Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Martin KaFai Lau says:

====================
pull-request: bpf-next 2023-08-03

We've added 54 non-merge commits during the last 10 day(s) which contain
a total of 84 files changed, 4026 insertions(+), 562 deletions(-).

The main changes are:

1) Add SO_REUSEPORT support for TC bpf_sk_assign from Lorenz Bauer,
Daniel Borkmann

2) Support new insns from cpu v4 from Yonghong Song

3) Non-atomically allocate freelist during prefill from YiFei Zhu

4) Support defragmenting IPv(4|6) packets in BPF from Daniel Xu

5) Add tracepoint to xdp attaching failure from Leon Hwang

6) struct netdev_rx_queue and xdp.h reshuffling to reduce
rebuild time from Jakub Kicinski

* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (54 commits)
net: invert the netdevice.h vs xdp.h dependency
net: move struct netdev_rx_queue out of netdevice.h
eth: add missing xdp.h includes in drivers
selftests/bpf: Add testcase for xdp attaching failure tracepoint
bpf, xdp: Add tracepoint to xdp attaching failure
selftests/bpf: fix static assert compilation issue for test_cls_*.c
bpf: fix bpf_probe_read_kernel prototype mismatch
riscv, bpf: Adapt bpf trampoline to optimized riscv ftrace framework
libbpf: fix typos in Makefile
tracing: bpf: use struct trace_entry in struct syscall_tp_t
bpf, devmap: Remove unused dtab field from bpf_dtab_netdev
bpf, cpumap: Remove unused cmap field from bpf_cpu_map_entry
netfilter: bpf: Only define get_proto_defrag_hook() if necessary
bpf: Fix an array-index-out-of-bounds issue in disasm.c
net: remove duplicate INDIRECT_CALLABLE_DECLARE of udp[6]_ehashfn
docs/bpf: Fix malformed documentation
bpf: selftests: Add defrag selftests
bpf: selftests: Support custom type and proto for client sockets
bpf: selftests: Support not connecting client socket
netfilter: bpf: Support BPF_F_NETFILTER_IP_DEFRAG in netfilter link
...
====================

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

Documentation/bpf/bpf_design_QA.rst

···
 it more complicated to support on arm64 and other archs. Also it
 needs div-by-zero runtime check.
 
-Q: Why there is no BPF_SDIV for signed divide operation?
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-A: Because it would be rarely used. llvm errors in such case and
-prints a suggestion to use unsigned divide instead.
-
 Q: Why BPF has implicit prologue and epilogue?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 A: Because architectures like sparc have register windows and in general

Documentation/bpf/standardization/instruction-set.rst

···
 The 'code' field encodes the operation as below, where 'src' and 'dst' refer
 to the values of the source and destination registers, respectively.
 
-========  =====  ==========================================================
-code      value  description
-========  =====  ==========================================================
-BPF_ADD   0x00   dst += src
-BPF_SUB   0x10   dst -= src
-BPF_MUL   0x20   dst \*= src
-BPF_DIV   0x30   dst = (src != 0) ? (dst / src) : 0
-BPF_OR    0x40   dst \|= src
-BPF_AND   0x50   dst &= src
-BPF_LSH   0x60   dst <<= (src & mask)
-BPF_RSH   0x70   dst >>= (src & mask)
-BPF_NEG   0x80   dst = -src
-BPF_MOD   0x90   dst = (src != 0) ? (dst % src) : dst
-BPF_XOR   0xa0   dst ^= src
-BPF_MOV   0xb0   dst = src
-BPF_ARSH  0xc0   sign extending dst >>= (src & mask)
-BPF_END   0xd0   byte swap operations (see `Byte swap instructions`_ below)
-========  =====  ==========================================================
+=========  =====  =======  ==========================================================
+code       value  offset   description
+=========  =====  =======  ==========================================================
+BPF_ADD    0x00   0        dst += src
+BPF_SUB    0x10   0        dst -= src
+BPF_MUL    0x20   0        dst \*= src
+BPF_DIV    0x30   0        dst = (src != 0) ? (dst / src) : 0
+BPF_SDIV   0x30   1        dst = (src != 0) ? (dst s/ src) : 0
+BPF_OR     0x40   0        dst \|= src
+BPF_AND    0x50   0        dst &= src
+BPF_LSH    0x60   0        dst <<= (src & mask)
+BPF_RSH    0x70   0        dst >>= (src & mask)
+BPF_NEG    0x80   0        dst = -dst
+BPF_MOD    0x90   0        dst = (src != 0) ? (dst % src) : dst
+BPF_SMOD   0x90   1        dst = (src != 0) ? (dst s% src) : dst
+BPF_XOR    0xa0   0        dst ^= src
+BPF_MOV    0xb0   0        dst = src
+BPF_MOVSX  0xb0   8/16/32  dst = (s8,s16,s32)src
+BPF_ARSH   0xc0   0        sign extending dst >>= (src & mask)
+BPF_END    0xd0   0        byte swap operations (see `Byte swap instructions`_ below)
+=========  =====  =======  ==========================================================
 
 Underflow and overflow are allowed during arithmetic operations, meaning
 the 64-bit or 32-bit value will wrap. If eBPF program execution would
···
 
   dst = dst ^ imm32
 
-Also note that the division and modulo operations are unsigned. Thus, for
-``BPF_ALU``, 'imm' is first interpreted as an unsigned 32-bit value, whereas
-for ``BPF_ALU64``, 'imm' is first sign extended to 64 bits and the result
-interpreted as an unsigned 64-bit value. There are no instructions for
-signed division or modulo.
+Note that most instructions have instruction offset of 0. Only three instructions
+(``BPF_SDIV``, ``BPF_SMOD``, ``BPF_MOVSX``) have a non-zero offset.
+
+The devision and modulo operations support both unsigned and signed flavors.
+
+For unsigned operations (``BPF_DIV`` and ``BPF_MOD``), for ``BPF_ALU``,
+'imm' is interpreted as a 32-bit unsigned value. For ``BPF_ALU64``,
+'imm' is first sign extended from 32 to 64 bits, and then interpreted as
+a 64-bit unsigned value.
+
+For signed operations (``BPF_SDIV`` and ``BPF_SMOD``), for ``BPF_ALU``,
+'imm' is interpreted as a 32-bit signed value. For ``BPF_ALU64``, 'imm'
+is first sign extended from 32 to 64 bits, and then interpreted as a
+64-bit signed value.
+
+The ``BPF_MOVSX`` instruction does a move operation with sign extension.
+``BPF_ALU | BPF_MOVSX`` sign extends 8-bit and 16-bit operands into 32
+bit operands, and zeroes the remaining upper 32 bits.
+``BPF_ALU64 | BPF_MOVSX`` sign extends 8-bit, 16-bit, and 32-bit
+operands into 64 bit operands.
 
 Shift operations use a mask of 0x3F (63) for 64-bit operations and 0x1F (31)
 for 32-bit operations.
 
 Byte swap instructions
-~~~~~~~~~~~~~~~~~~~~~~
+----------------------
 
-The byte swap instructions use an instruction class of ``BPF_ALU`` and a 4-bit
-'code' field of ``BPF_END``.
+The byte swap instructions use instruction classes of ``BPF_ALU`` and ``BPF_ALU64``
+and a 4-bit 'code' field of ``BPF_END``.
 
 The byte swap instructions operate on the destination register
 only and do not use a separate source register or immediate value.
 
-The 1-bit source operand field in the opcode is used to select what byte
-order the operation convert from or to:
+For ``BPF_ALU``, the 1-bit source operand field in the opcode is used to
+select what byte order the operation converts from or to. For
+``BPF_ALU64``, the 1-bit source operand field in the opcode is reserved
+and must be set to 0.
 
-=========  =====  =================================================
-source     value  description
-=========  =====  =================================================
-BPF_TO_LE  0x00   convert between host byte order and little endian
-BPF_TO_BE  0x08   convert between host byte order and big endian
-=========  =====  =================================================
+=========  =========  =====  =================================================
+class      source     value  description
+=========  =========  =====  =================================================
+BPF_ALU    BPF_TO_LE  0x00   convert between host byte order and little endian
+BPF_ALU    BPF_TO_BE  0x08   convert between host byte order and big endian
+BPF_ALU64  Reserved   0x00   do byte swap unconditionally
+=========  =========  =====  =================================================
 
 The 'imm' field encodes the width of the swap operations.  The following widths
 are supported: 16, 32 and 64.
···
 
   dst = htobe64(dst)
 
+``BPF_ALU64 | BPF_TO_LE | BPF_END`` with imm = 16/32/64 means::
+
+  dst = bswap16 dst
+  dst = bswap32 dst
+  dst = bswap64 dst
+
 Jump instructions
 -----------------
 
···
 ========  =====  ===  ===========================================  =========================================
 code      value  src  description                                  notes
 ========  =====  ===  ===========================================  =========================================
-BPF_JA    0x0    0x0  PC += offset                                 BPF_JMP only
+BPF_JA    0x0    0x0  PC += offset                                 BPF_JMP class
+BPF_JA    0x0    0x0  PC += imm                                    BPF_JMP32 class
 BPF_JEQ   0x1    any  PC += offset if dst == src
 BPF_JGT   0x2    any  PC += offset if dst > src                    unsigned
 BPF_JGE   0x3    any  PC += offset if dst >= src                   unsigned
···
   if (s32)dst s>= (s32)src goto +offset
 
 where 's>=' indicates a signed '>=' comparison.
+
+``BPF_JA | BPF_K | BPF_JMP32`` (0x06) means::
+
+  gotol +imm
+
+where 'imm' means the branch offset comes from insn 'imm' field.
+
+Note that there are two flavors of ``BPF_JA`` instructions. The
+``BPF_JMP`` class permits a 16-bit jump offset specified by the 'offset'
+field, whereas the ``BPF_JMP32`` class permits a 32-bit jump offset
+specified by the 'imm' field. A > 16-bit conditional jump may be
+converted to a < 16-bit conditional jump plus a 32-bit unconditional
+jump.
 
 Helper functions
 ~~~~~~~~~~~~~~~~
···
   BPF_ABS        0x20   legacy BPF packet access (absolute)   `Legacy BPF Packet access instructions`_
   BPF_IND        0x40   legacy BPF packet access (indirect)   `Legacy BPF Packet access instructions`_
   BPF_MEM        0x60   regular load and store operations     `Regular load and store operations`_
+  BPF_MEMSX      0x80   sign-extension load operations        `Sign-extension load operations`_
   BPF_ATOMIC     0xc0   atomic operations                     `Atomic operations`_
   =============  =====  ====================================  =============
 
···
 
 ``BPF_MEM | <size> | BPF_LDX`` means::
 
-  dst = *(size *) (src + offset)
+  dst = *(unsigned size *) (src + offset)
 
-Where size is one of: ``BPF_B``, ``BPF_H``, ``BPF_W``, or ``BPF_DW``.
+Where size is one of: ``BPF_B``, ``BPF_H``, ``BPF_W``, or ``BPF_DW`` and
+'unsigned size' is one of u8, u16, u32 or u64.
+
+Sign-extension load operations
+------------------------------
+
+The ``BPF_MEMSX`` mode modifier is used to encode sign-extension load
+instructions that transfer data between a register and memory.
+
+``BPF_MEMSX | <size> | BPF_LDX`` means::
+
+  dst = *(signed size *) (src + offset)
+
+Where size is one of: ``BPF_B``, ``BPF_H`` or ``BPF_W``, and
+'signed size' is one of s8, s16 or s32.
 
 Atomic operations
 -----------------

MAINTAINERS

···
 M:	Andrii Nakryiko <[e-mail]>
 R:	Martin KaFai Lau <[e-mail]>
 R:	Song Liu <[e-mail]>
-R:	Yonghong Song <[e-mail]>
+R:	Yonghong Song <[e-mail]>
 R:	John Fastabend <[e-mail]>
 R:	KP Singh <[e-mail]>
 R:	Stanislav Fomichev <[e-mail]>
···
 F:	tools/testing/selftests/bpf/
 
 BPF [ITERATOR]
-M:	Yonghong Song <[e-mail]>
+M:	Yonghong Song <[e-mail]>
 L:	[e-mail]
 S:	Maintained
 F:	kernel/bpf/*iter.c

arch/riscv/net/bpf_jit_comp64.c

···
 #include <asm/patch.h>
 #include "bpf_jit.h"
 
+#define RV_FENTRY_NINSNS 2
+
 #define RV_REG_TCC RV_REG_A6
 #define RV_REG_TCC_SAVED RV_REG_S6 /* Store A6 in S6 if program do calls */
 
···
 	if (!is_tail_call)
 		emit_mv(RV_REG_A0, RV_REG_A5, ctx);
 	emit_jalr(RV_REG_ZERO, is_tail_call ? RV_REG_T3 : RV_REG_RA,
-		  is_tail_call ? 20 : 0, /* skip reserved nops and TCC init */
+		  is_tail_call ? (RV_FENTRY_NINSNS + 1) * 4 : 0, /* skip reserved nops and TCC init */
 		  ctx);
 }
 
···
 	return 0;
 }
 
-static int gen_call_or_nops(void *target, void *ip, u32 *insns)
-{
-	s64 rvoff;
-	int i, ret;
-	struct rv_jit_context ctx;
-
-	ctx.ninsns = 0;
-	ctx.insns = (u16 *)insns;
-
-	if (!target) {
-		for (i = 0; i < 4; i++)
-			emit(rv_nop(), &ctx);
-		return 0;
-	}
-
-	rvoff = (s64)(target - (ip + 4));
-	emit(rv_sd(RV_REG_SP, -8, RV_REG_RA), &ctx);
-	ret = emit_jump_and_link(RV_REG_RA, rvoff, false, &ctx);
-	if (ret)
-		return ret;
-	emit(rv_ld(RV_REG_RA, -8, RV_REG_SP), &ctx);
-
-	return 0;
-}
-
-static int gen_jump_or_nops(void *target, void *ip, u32 *insns)
+static int gen_jump_or_nops(void *target, void *ip, u32 *insns, bool is_call)
 {
 	s64 rvoff;
 	struct rv_jit_context ctx;
···
 	}
 
 	rvoff = (s64)(target - ip);
-	return emit_jump_and_link(RV_REG_ZERO, rvoff, false, &ctx);
+	return emit_jump_and_link(is_call ? RV_REG_T0 : RV_REG_ZERO, rvoff, false, &ctx);
 }
 
 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type,
 		       void *old_addr, void *new_addr)
 {
-	u32 old_insns[4], new_insns[4];
+	u32 old_insns[RV_FENTRY_NINSNS], new_insns[RV_FENTRY_NINSNS];
 	bool is_call = poke_type == BPF_MOD_CALL;
-	int (*gen_insns)(void *target, void *ip, u32 *insns);
-	int ninsns = is_call ? 4 : 2;
 	int ret;
 
-	if (!is_bpf_text_address((unsigned long)ip))
+	if (!is_kernel_text((unsigned long)ip) &&
+	    !is_bpf_text_address((unsigned long)ip))
 		return -ENOTSUPP;
 
-	gen_insns = is_call ? gen_call_or_nops : gen_jump_or_nops;
-
-	ret = gen_insns(old_addr, ip, old_insns);
+	ret = gen_jump_or_nops(old_addr, ip, old_insns, is_call);
 	if (ret)
 		return ret;
 
-	if (memcmp(ip, old_insns, ninsns * 4))
+	if (memcmp(ip, old_insns, RV_FENTRY_NINSNS * 4))
 		return -EFAULT;
 
-	ret = gen_insns(new_addr, ip, new_insns);
+	ret = gen_jump_or_nops(new_addr, ip, new_insns, is_call);
 	if (ret)
 		return ret;
 
 	cpus_read_lock();
 	mutex_lock(&text_mutex);
-	if (memcmp(ip, new_insns, ninsns * 4))
-		ret = patch_text(ip, new_insns, ninsns);
+	if (memcmp(ip, new_insns, RV_FENTRY_NINSNS * 4))
+		ret = patch_text(ip, new_insns, RV_FENTRY_NINSNS);
 	mutex_unlock(&text_mutex);
 	cpus_read_unlock();
 
···
 	int i, ret, offset;
 	int *branches_off = NULL;
 	int stack_size = 0, nregs = m->nr_args;
-	int retaddr_off, fp_off, retval_off, args_off;
-	int nregs_off, ip_off, run_ctx_off, sreg_off;
+	int retval_off, args_off, nregs_off, ip_off, run_ctx_off, sreg_off;
 	struct bpf_tramp_links *fentry = &tlinks[BPF_TRAMP_FENTRY];
 	struct bpf_tramp_links *fexit = &tlinks[BPF_TRAMP_FEXIT];
 	struct bpf_tramp_links *fmod_ret = &tlinks[BPF_TRAMP_MODIFY_RETURN];
···
 	bool save_ret;
 	u32 insn;
 
-	/* Generated trampoline stack layout:
+	/* Two types of generated trampoline stack layout:
 	 *
-	 * FP - 8	    [ RA of parent func	] return address of parent
+	 * 1. trampoline called from function entry
+	 * --------------------------------------
+	 * FP + 8	    [ RA to parent func	] return address to parent
 	 *					  function
-	 * FP - retaddr_off [ RA of traced func	] return address of traced
+	 * FP + 0	    [ FP of parent func ] frame pointer of parent
 	 *					  function
-	 * FP - fp_off	    [ FP of parent func ]
+	 * FP - 8           [ T0 to traced func ] return address of traced
+	 *					  function
+	 * FP - 16	    [ FP of traced func ] frame pointer of traced
+	 *					  function
+	 * --------------------------------------
+	 *
+	 * 2. trampoline called directly
+	 * --------------------------------------
+	 * FP - 8	    [ RA to caller func ] return address to caller
+	 *					  function
+	 * FP - 16	    [ FP of caller func	] frame pointer of caller
+	 *					  function
+	 * --------------------------------------
 	 *
 	 * FP - retval_off  [ return value      ] BPF_TRAMP_F_CALL_ORIG or
 	 *					  BPF_TRAMP_F_RET_FENTRY_RET
···
 	if (nregs > 8)
 		return -ENOTSUPP;
 
-	/* room for parent function return address */
-	stack_size += 8;
-
-	stack_size += 8;
-	retaddr_off = stack_size;
-
-	stack_size += 8;
-	fp_off = stack_size;
+	/* room of trampoline frame to store return address and frame pointer */
+	stack_size += 16;
 
 	save_ret = flags & (BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_RET_FENTRY_RET);
 	if (save_ret) {
···
 
 	stack_size = round_up(stack_size, 16);
 
-	emit_addi(RV_REG_SP, RV_REG_SP, -stack_size, ctx);
+	if (func_addr) {
+		/* For the trampoline called from function entry,
+		 * the frame of traced function and the frame of
+		 * trampoline need to be considered.
+		 */
+		emit_addi(RV_REG_SP, RV_REG_SP, -16, ctx);
+		emit_sd(RV_REG_SP, 8, RV_REG_RA, ctx);
+		emit_sd(RV_REG_SP, 0, RV_REG_FP, ctx);
+		emit_addi(RV_REG_FP, RV_REG_SP, 16, ctx);
 
-	emit_sd(RV_REG_SP, stack_size - retaddr_off, RV_REG_RA, ctx);
-	emit_sd(RV_REG_SP, stack_size - fp_off, RV_REG_FP, ctx);
-
-	emit_addi(RV_REG_FP, RV_REG_SP, stack_size, ctx);
+		emit_addi(RV_REG_SP, RV_REG_SP, -stack_size, ctx);
+		emit_sd(RV_REG_SP, stack_size - 8, RV_REG_T0, ctx);
+		emit_sd(RV_REG_SP, stack_size - 16, RV_REG_FP, ctx);
+		emit_addi(RV_REG_FP, RV_REG_SP, stack_size, ctx);
+	} else {
+		/* For the trampoline called directly, just handle
+		 * the frame of trampoline.
+		 */
+		emit_addi(RV_REG_SP, RV_REG_SP, -stack_size, ctx);
+		emit_sd(RV_REG_SP, stack_size - 8, RV_REG_RA, ctx);
+		emit_sd(RV_REG_SP, stack_size - 16, RV_REG_FP, ctx);
+		emit_addi(RV_REG_FP, RV_REG_SP, stack_size, ctx);
+	}
 
 	/* callee saved register S1 to pass start time */
 	emit_sd(RV_REG_FP, -sreg_off, RV_REG_S1, ctx);
···
 
 	/* skip to actual body of traced function */
 	if (flags & BPF_TRAMP_F_SKIP_FRAME)
-		orig_call += 16;
+		orig_call += RV_FENTRY_NINSNS * 4;
 
 	if (flags & BPF_TRAMP_F_CALL_ORIG) {
 		emit_imm(RV_REG_A0, (const s64)im, ctx);
···
 
 	emit_ld(RV_REG_S1, -sreg_off, RV_REG_FP, ctx);
 
-	if (flags & BPF_TRAMP_F_SKIP_FRAME)
-		/* return address of parent function */
+	if (func_addr) {
+		/* trampoline called from function entry */
+		emit_ld(RV_REG_T0, stack_size - 8, RV_REG_SP, ctx);
+		emit_ld(RV_REG_FP, stack_size - 16, RV_REG_SP, ctx);
+		emit_addi(RV_REG_SP, RV_REG_SP, stack_size, ctx);
+
+		emit_ld(RV_REG_RA, 8, RV_REG_SP, ctx);
+		emit_ld(RV_REG_FP, 0, RV_REG_SP, ctx);
+		emit_addi(RV_REG_SP, RV_REG_SP, 16, ctx);
+
+		if (flags & BPF_TRAMP_F_SKIP_FRAME)
+			/* return to parent function */
+			emit_jalr(RV_REG_ZERO, RV_REG_RA, 0, ctx);
+		else
+			/* return to traced function */
+			emit_jalr(RV_REG_ZERO, RV_REG_T0, 0, ctx);
+	} else {
+		/* trampoline called directly */
 		emit_ld(RV_REG_RA, stack_size - 8, RV_REG_SP, ctx);
-	else
-		/* return address of traced function */
-		emit_ld(RV_REG_RA, stack_size - retaddr_off, RV_REG_SP, ctx);
+		emit_ld(RV_REG_FP, stack_size - 16, RV_REG_SP, ctx);
+		emit_addi(RV_REG_SP, RV_REG_SP, stack_size, ctx);
 
-	emit_ld(RV_REG_FP, stack_size - fp_off, RV_REG_SP, ctx);
-	emit_addi(RV_REG_SP, RV_REG_SP, stack_size, ctx);
-
-	emit_jalr(RV_REG_ZERO, RV_REG_RA, 0, ctx);
+		emit_jalr(RV_REG_ZERO, RV_REG_RA, 0, ctx);
+	}
 
 	ret = ctx->ninsns;
 out:
···
 
 	store_offset = stack_adjust - 8;
 
-	/* reserve 4 nop insns */
-	for (i = 0; i < 4; i++)
+	/* nops reserved for auipc+jalr pair */
+	for (i = 0; i < RV_FENTRY_NINSNS; i++)
 		emit(rv_nop(), ctx);
 
 	/* First instruction is always setting the tail-call-counter

arch/x86/net/bpf_jit_comp.c

···
 	*pprog = prog;
 }
 
+static void emit_movsx_reg(u8 **pprog, int num_bits, bool is64, u32 dst_reg,
+			   u32 src_reg)
+{
+	u8 *prog = *pprog;
+
+	if (is64) {
+		/* movs[b,w,l]q dst, src */
+		if (num_bits == 8)
+			EMIT4(add_2mod(0x48, src_reg, dst_reg), 0x0f, 0xbe,
+			      add_2reg(0xC0, src_reg, dst_reg));
+		else if (num_bits == 16)
+			EMIT4(add_2mod(0x48, src_reg, dst_reg), 0x0f, 0xbf,
+			      add_2reg(0xC0, src_reg, dst_reg));
+		else if (num_bits == 32)
+			EMIT3(add_2mod(0x48, src_reg, dst_reg), 0x63,
+			      add_2reg(0xC0, src_reg, dst_reg));
+	} else {
+		/* movs[b,w]l dst, src */
+		if (num_bits == 8) {
+			EMIT4(add_2mod(0x40, src_reg, dst_reg), 0x0f, 0xbe,
+			      add_2reg(0xC0, src_reg, dst_reg));
+		} else if (num_bits == 16) {
+			if (is_ereg(dst_reg) || is_ereg(src_reg))
+				EMIT1(add_2mod(0x40, src_reg, dst_reg));
+			EMIT3(add_2mod(0x0f, src_reg, dst_reg), 0xbf,
+			      add_2reg(0xC0, src_reg, dst_reg));
+		}
+	}
+
+	*pprog = prog;
+}
+
 /* Emit the suffix (ModR/M etc) for addressing *(ptr_reg + off) and val_reg */
 static void emit_insn_suffix(u8 **pprog, u32 ptr_reg, u32 val_reg, int off)
 {
···
 	case BPF_DW:
 		/* Emit 'mov rax, qword ptr [rax+0x14]' */
 		EMIT2(add_2mod(0x48, src_reg, dst_reg), 0x8B);
+		break;
+	}
+	emit_insn_suffix(&prog, src_reg, dst_reg, off);
+	*pprog = prog;
+}
+
+/* LDSX: dst_reg = *(s8*)(src_reg + off) */
+static void emit_ldsx(u8 **pprog, u32 size, u32 dst_reg, u32 src_reg, int off)
+{
+	u8 *prog = *pprog;
+
+	switch (size) {
+	case BPF_B:
+		/* Emit 'movsx rax, byte ptr [rax + off]' */
+		EMIT3(add_2mod(0x48, src_reg, dst_reg), 0x0F, 0xBE);
+		break;
+	case BPF_H:
+		/* Emit 'movsx rax, word ptr [rax + off]' */
+		EMIT3(add_2mod(0x48, src_reg, dst_reg), 0x0F, 0xBF);
+		break;
+	case BPF_W:
+		/* Emit 'movsx rax, dword ptr [rax+0x14]' */
+		EMIT2(add_2mod(0x48, src_reg, dst_reg), 0x63);
 		break;
 	}
 	emit_insn_suffix(&prog, src_reg, dst_reg, off);
···
 
 		case BPF_ALU64 | BPF_MOV | BPF_X:
 		case BPF_ALU | BPF_MOV | BPF_X:
-			emit_mov_reg(&prog,
-				     BPF_CLASS(insn->code) == BPF_ALU64,
-				     dst_reg, src_reg);
+			if (insn->off == 0)
+				emit_mov_reg(&prog,
+					     BPF_CLASS(insn->code) == BPF_ALU64,
+					     dst_reg, src_reg);
+			else
+				emit_movsx_reg(&prog, insn->off,
+					       BPF_CLASS(insn->code) == BPF_ALU64,
+					       dst_reg, src_reg);
 			break;
 
 			/* neg dst */
···
 				/* mov rax, dst_reg */
 				emit_mov_reg(&prog, is64, BPF_REG_0, dst_reg);
 
-			/*
-			 * xor edx, edx
-			 * equivalent to 'xor rdx, rdx', but one byte less
-			 */
-			EMIT2(0x31, 0xd2);
+			if (insn->off == 0) {
+				/*
+				 * xor edx, edx
+				 * equivalent to 'xor rdx, rdx', but one byte less
+				 */
+				EMIT2(0x31, 0xd2);
 
-			/* div src_reg */
-			maybe_emit_1mod(&prog, src_reg, is64);
-			EMIT2(0xF7, add_1reg(0xF0, src_reg));
+				/* div src_reg */
+				maybe_emit_1mod(&prog, src_reg, is64);
+				EMIT2(0xF7, add_1reg(0xF0, src_reg));
+			} else {
+				if (BPF_CLASS(insn->code) == BPF_ALU)
+					EMIT1(0x99); /* cdq */
+				else
+					EMIT2(0x48, 0x99); /* cqo */
+
+				/* idiv src_reg */
+				maybe_emit_1mod(&prog, src_reg, is64);
+				EMIT2(0xF7, add_1reg(0xF8, src_reg));
+			}
 
 			if (BPF_OP(insn->code) == BPF_MOD &&
 			    dst_reg != BPF_REG_3)
···
 			break;
 
 		case BPF_ALU | BPF_END | BPF_FROM_BE:
+		case BPF_ALU64 | BPF_END | BPF_FROM_LE:
 			switch (imm32) {
 			case 16:
 				/* Emit 'ror %ax, 8' to swap lower 2 bytes */
···
 		case BPF_LDX | BPF_PROBE_MEM | BPF_W:
 		case BPF_LDX | BPF_MEM | BPF_DW:
 		case BPF_LDX | BPF_PROBE_MEM | BPF_DW:
+			/* LDXS: dst_reg = *(s8*)(src_reg + off) */
+		case BPF_LDX | BPF_MEMSX | BPF_B:
+		case BPF_LDX | BPF_MEMSX | BPF_H:
+		case BPF_LDX | BPF_MEMSX | BPF_W:
+		case BPF_LDX | BPF_PROBE_MEMSX | BPF_B:
+		case BPF_LDX | BPF_PROBE_MEMSX | BPF_H:
+		case BPF_LDX | BPF_PROBE_MEMSX | BPF_W:
 			insn_off = insn->off;
 
-			if (BPF_MODE(insn->code) == BPF_PROBE_MEM) {
+			if (BPF_MODE(insn->code) == BPF_PROBE_MEM ||
+			    BPF_MODE(insn->code) == BPF_PROBE_MEMSX) {
 				/* Conservatively check that src_reg + insn->off is a kernel address:
 				 *   src_reg + insn->off >= TASK_SIZE_MAX + PAGE_SIZE
 				 * src_reg is used as scratch for src_reg += insn->off and restored
···
 				start_of_ldx = prog;
 				end_of_jmp[-1] = start_of_ldx - end_of_jmp;
 			}
-			emit_ldx(&prog, BPF_SIZE(insn->code), dst_reg, src_reg, insn_off);
-			if (BPF_MODE(insn->code) == BPF_PROBE_MEM) {
+			if (BPF_MODE(insn->code) == BPF_PROBE_MEMSX ||
+			    BPF_MODE(insn->code) == BPF_MEMSX)
+				emit_ldsx(&prog, BPF_SIZE(insn->code), dst_reg, src_reg, insn_off);
+			else
+				emit_ldx(&prog, BPF_SIZE(insn->code), dst_reg, src_reg, insn_off);
+			if (BPF_MODE(insn->code) == BPF_PROBE_MEM ||
+			    BPF_MODE(insn->code) == BPF_PROBE_MEMSX) {
 				struct exception_table_entry *ex;
 				u8 *_insn = image + proglen + (start_of_ldx - temp);
 				s64 delta;
···
 			break;
 
 		case BPF_JMP | BPF_JA:
-			if (insn->off == -1)
-				/* -1 jmp instructions will always jump
-				 * backwards two bytes. Explicitly handling
-				 * this case avoids wasting too many passes
-				 * when there are long sequences of replaced
-				 * dead code.
-				 */
-				jmp_offset = -2;
-			else
-				jmp_offset = addrs[i + insn->off] - addrs[i];
+		case BPF_JMP32 | BPF_JA:
+			if (BPF_CLASS(insn->code) == BPF_JMP) {
+				if (insn->off == -1)
+					/* -1 jmp instructions will always jump
+					 * backwards two bytes. Explicitly handling
+					 * this case avoids wasting too many passes
+					 * when there are long sequences of replaced
+					 * dead code.
+					 */
+					jmp_offset = -2;
+				else
+					jmp_offset = addrs[i + insn->off] - addrs[i];
+			} else {
+				if (insn->imm == -1)
+					jmp_offset = -2;
+				else
+					jmp_offset = addrs[i + insn->imm] - addrs[i];
+			}
 
 			if (!jmp_offset) {
 				/*

drivers/net/bonding/bond_main.c

···
 #include <net/tls.h>
 #endif
 #include <net/ip6_route.h>
+#include <net/xdp.h>
 
 #include "bonding_priv.h"
 

drivers/net/ethernet/amazon/ena/ena_netdev.h

···
 #include <linux/interrupt.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
+#include <net/xdp.h>
 #include <uapi/linux/bpf.h>
 
 #include "ena_com.h"

drivers/net/ethernet/engleder/tsnep.h

···
 #include <linux/net_tstamp.h>
 #include <linux/ptp_clock_kernel.h>
 #include <linux/miscdevice.h>
+#include <net/xdp.h>
 
 #define TSNEP "tsnep"
 

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h

···
 #include <linux/fsl/mc.h>
 #include <linux/net_tstamp.h>
 #include <net/devlink.h>
+#include <net/xdp.h>
 
 #include <soc/fsl/dpaa2-io.h>
 #include <soc/fsl/dpaa2-fd.h>

drivers/net/ethernet/freescale/enetc/enetc.h

···
 #include <linux/if_vlan.h>
 #include <linux/phylink.h>
 #include <linux/dim.h>
+#include <net/xdp.h>
 
 #include "enetc_hw.h"
 

drivers/net/ethernet/freescale/fec.h

···
 #include <linux/timecounter.h>
 #include <dt-bindings/firmware/imx/rsrc.h>
 #include <linux/firmware/imx/sci.h>
+#include <net/xdp.h>
 
 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
     defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \

drivers/net/ethernet/fungible/funeth/funeth_txrx.h

···
 
 #include <linux/netdevice.h>
 #include <linux/u64_stats_sync.h>
+#include <net/xdp.h>
 
 /* Tx descriptor size */
 #define FUNETH_SQE_SIZE 64U

drivers/net/ethernet/google/gve/gve.h

···
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <linux/u64_stats_sync.h>
+#include <net/xdp.h>
 
 #include "gve_desc.h"
 #include "gve_desc_dqo.h"

drivers/net/ethernet/intel/igc/igc.h

···
 #include <linux/net_tstamp.h>
 #include <linux/bitfield.h>
 #include <linux/hrtimer.h>
+#include <net/xdp.h>
 
 #include "igc_hw.h"
 

drivers/net/ethernet/microchip/lan966x/lan966x_main.h

···
 #include <net/pkt_cls.h>
 #include <net/pkt_sched.h>
 #include <net/switchdev.h>
+#include <net/xdp.h>
 
 #include <vcap_api.h>
 #include <vcap_api_client.h>

drivers/net/ethernet/microsoft/mana/mana_en.c

···
 
 #include <net/checksum.h>
 #include <net/ip6_checksum.h>
+#include <net/xdp.h>
 
 #include <net/mana/mana.h>
 #include <net/mana/mana_auxiliary.h>

drivers/net/ethernet/stmicro/stmmac/stmmac.h

···
 #include <linux/net_tstamp.h>
 #include <linux/reset.h>
 #include <net/page_pool.h>
+#include <net/xdp.h>
 #include <uapi/linux/bpf.h>
 
 struct stmmac_resources {

drivers/net/ethernet/ti/cpsw_priv.h

···
 #ifndef DRIVERS_NET_ETHERNET_TI_CPSW_PRIV_H_
 #define DRIVERS_NET_ETHERNET_TI_CPSW_PRIV_H_
 
+#include <net/xdp.h>
 #include <uapi/linux/bpf.h>
 
 #include "davinci_cpdma.h"

drivers/net/hyperv/hyperv_net.h

···
 #include <linux/hyperv.h>
 #include <linux/rndis.h>
 #include <linux/jhash.h>
+#include <net/xdp.h>
 
 /* RSS related */
 #define OID_GEN_RECEIVE_SCALE_CAPABILITIES 0x00010203  /* query only */

drivers/net/tap.c

···
 #include <net/net_namespace.h>
 #include <net/rtnetlink.h>
 #include <net/sock.h>
+#include <net/xdp.h>
 #include <linux/virtio_net.h>
 #include <linux/skb_array.h>
 

drivers/net/virtio_net.c

···
 #include <net/route.h>
 #include <net/xdp.h>
 #include <net/net_failover.h>
+#include <net/netdev_rx_queue.h>
 
 static int napi_weight = NAPI_POLL_WEIGHT;
 module_param(napi_weight, int, 0444);

include/linux/bpf.h

···
 }
 #endif /* CONFIG_BPF_SYSCALL */
 
+static __always_inline int
+bpf_probe_read_kernel_common(void *dst, u32 size, const void *unsafe_ptr)
+{
+	int ret = -EFAULT;
+
+	if (IS_ENABLED(CONFIG_BPF_EVENTS))
+		ret = copy_from_kernel_nofault(dst, unsafe_ptr, size);
+	if (unlikely(ret < 0))
+		memset(dst, 0, size);
+	return ret;
+}
+
 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
 			  struct btf_mod_pair *used_btfs, u32 len);
 

include/linux/filter.h

···
 /* unused opcode to mark special load instruction. Same as BPF_ABS */
 #define BPF_PROBE_MEM	0x20
 
+/* unused opcode to mark special ldsx instruction. Same as BPF_IND */
+#define BPF_PROBE_MEMSX	0x40
+
 /* unused opcode to mark call to interpreter with arguments */
 #define BPF_CALL_ARGS	0xe0
 
···
 
 /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
 
-#define BPF_ALU64_REG(OP, DST, SRC)				\
+#define BPF_ALU64_REG_OFF(OP, DST, SRC, OFF)			\
 	((struct bpf_insn) {					\
 		.code  = BPF_ALU64 | BPF_OP(OP) | BPF_X,	\
 		.dst_reg = DST,					\
 		.src_reg = SRC,					\
-		.off   = 0,					\
+		.off   = OFF,					\
 		.imm   = 0 })
 
-#define BPF_ALU32_REG(OP, DST, SRC)				\
+#define BPF_ALU64_REG(OP, DST, SRC)				\
+	BPF_ALU64_REG_OFF(OP, DST, SRC, 0)
+
+#define BPF_ALU32_REG_OFF(OP, DST, SRC, OFF)			\
 	((struct bpf_insn) {					\
 		.code  = BPF_ALU | BPF_OP(OP) | BPF_X,		\
 		.dst_reg = DST,					\
 		.src_reg = SRC,					\
-		.off   = 0,					\
+		.off   = OFF,					\
 		.imm   = 0 })
+
+#define BPF_ALU32_REG(OP, DST, SRC)				\
+	BPF_ALU32_REG_OFF(OP, DST, SRC, 0)
 
 /* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */
 
···
 DECLARE_STATIC_KEY_FALSE(bpf_master_redirect_enabled_key);
 
 u32 xdp_master_redirect(struct xdp_buff *xdp);
-
-static __always_inline u32 bpf_prog_run_xdp(const struct bpf_prog *prog,
-					    struct xdp_buff *xdp)
-{
-	/* Driver XDP hooks are invoked within a single NAPI poll cycle and thus
-	 * under local_bh_disable(), which provides the needed RCU protection
-	 * for accessing map entries.
-	 */
-	u32 act = __bpf_prog_run(prog, xdp, BPF_DISPATCHER_FUNC(xdp));
-
-	if (static_branch_unlikely(&bpf_master_redirect_enabled_key)) {
-		if (act == XDP_TX && netif_is_bond_slave(xdp->rxq->dev))
-			act = xdp_master_redirect(xdp);
-	}
-
-	return act;
-}
 
 void bpf_prog_change_xdp(struct bpf_prog *prev_prog, struct bpf_prog *prog);
 

include/linux/netdevice.h

···
 #include <net/dcbnl.h>
 #endif
 #include <net/netprio_cgroup.h>
-#include <net/xdp.h>
 
 #include <linux/netdev_features.h>
 #include <linux/neighbour.h>
···
 struct udp_tunnel_nic;
 struct bpf_prog;
 struct xdp_buff;
+struct xdp_frame;
+struct xdp_metadata_ops;
 struct xdp_md;
+
+typedef u32 xdp_features_t;
 
 void synchronize_net(void);
 void netdev_set_default_ethtool_ops(struct net_device *dev,
···
 			 u16 filter_id);
 #endif
 #endif /* CONFIG_RPS */
-
-/* This structure contains an instance of an RX queue. */
-struct netdev_rx_queue {
-	struct xdp_rxq_info		xdp_rxq;
-#ifdef CONFIG_RPS
-	struct rps_map __rcu		*rps_map;
-	struct rps_dev_flow_table __rcu	*rps_flow_table;
-#endif
-	struct kobject			kobj;
-	struct net_device		*dev;
-	netdevice_tracker		dev_tracker;
-
-#ifdef CONFIG_XDP_SOCKETS
-	struct xsk_buff_pool            *pool;
-#endif
-} ____cacheline_aligned_in_smp;
-
-/*
- * RX queue sysfs structures and functions.
- */
-struct rx_queue_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
-	ssize_t (*store)(struct netdev_rx_queue *queue,
-			 const char *buf, size_t len);
-};
 
 /* XPS map type and offset of the xps map within net_device->xps_maps[]. */
 enum xps_map_type {
···
 	int			(*ndo_hwtstamp_set)(struct net_device *dev,
 						    struct kernel_hwtstamp_config *kernel_config,
 						    struct netlink_ext_ack *extack);
-};
-
-struct xdp_metadata_ops {
-	int	(*xmo_rx_timestamp)(const struct xdp_md *ctx, u64 *timestamp);
-	int	(*xmo_rx_hash)(const struct xdp_md *ctx, u32 *hash,
-			       enum xdp_rss_hash_type *rss_type);
 };
 
 /**
···
 #endif
 int netif_set_real_num_queues(struct net_device *dev,
 			      unsigned int txq, unsigned int rxq);
-
-static inline struct netdev_rx_queue *
-__netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
-{
-	return dev->_rx + rxq;
-}
-
-#ifdef CONFIG_SYSFS
-static inline unsigned int get_netdev_rx_queue_index(
-		struct netdev_rx_queue *queue)
-{
-	struct net_device *dev = queue->dev;
-	int index = queue - dev->_rx;
-
-	BUG_ON(index >= dev->num_rx_queues);
-	return index;
-}
-#endif
 
 int netif_get_num_default_rss_queues(void);
 

include/linux/netfilter.h

···
 #include <linux/wait.h>
 #include <linux/list.h>
 #include <linux/static_key.h>
+#include <linux/module.h>
 #include <linux/netfilter_defs.h>
 #include <linux/netdevice.h>
 #include <linux/sockptr.h>
···
 			   enum ip_conntrack_info ctinfo, s32 off);
 };
 extern const struct nfnl_ct_hook __rcu *nfnl_ct_hook;
+
+struct nf_defrag_hook {
+	struct module *owner;
+	int (*enable)(struct net *net);
+	void (*disable)(struct net *net);
+};
+
+extern const struct nf_defrag_hook __rcu *nf_defrag_v4_hook;
+extern const struct nf_defrag_hook __rcu *nf_defrag_v6_hook;
 
 /*
  * nf_skb_duplicated - TEE target has sent a packet

include/net/busy_poll.h

···
 #include <linux/sched/clock.h>
 #include <linux/sched/signal.h>
 #include <net/ip.h>
+#include <net/xdp.h>
 
 /*		0 - Reserved to indicate value not set
  *     1..NR_CPUS - Reserved for sender_cpu

include/net/inet6_hashtables.h

···
 					const u16 hnum, const int dif,
 					const int sdif);
 
+typedef u32 (inet6_ehashfn_t)(const struct net *net,
+			       const struct in6_addr *laddr, const u16 lport,
+			       const struct in6_addr *faddr, const __be16 fport);
+
+inet6_ehashfn_t inet6_ehashfn;
+
+INDIRECT_CALLABLE_DECLARE(inet6_ehashfn_t udp6_ehashfn);
+
+struct sock *inet6_lookup_reuseport(struct net *net, struct sock *sk,
+				    struct sk_buff *skb, int doff,
+				    const struct in6_addr *saddr,
+				    __be16 sport,
+				    const struct in6_addr *daddr,
+				    unsigned short hnum,
+				    inet6_ehashfn_t *ehashfn);
+
 struct sock *inet6_lookup_listener(struct net *net,
 				   struct inet_hashinfo *hashinfo,
 				   struct sk_buff *skb, int doff,
···
 				   const struct in6_addr *daddr,
 				   const unsigned short hnum,
 				   const int dif, const int sdif);
+
+struct sock *inet6_lookup_run_sk_lookup(struct net *net,
+					int protocol,
+					struct sk_buff *skb, int doff,
+					const struct in6_addr *saddr,
+					const __be16 sport,
+					const struct in6_addr *daddr,
+					const u16 hnum, const int dif,
+					inet6_ehashfn_t *ehashfn);
 
 static inline struct sock *__inet6_lookup(struct net *net,
 					  struct inet_hashinfo *hashinfo,
···
 				     daddr, hnum, dif, sdif);
 }
 
+static inline
+struct sock *inet6_steal_sock(struct net *net, struct sk_buff *skb, int doff,
+			      const struct in6_addr *saddr, const __be16 sport,
+			      const struct in6_addr *daddr, const __be16 dport,
+			      bool *refcounted, inet6_ehashfn_t *ehashfn)
+{
+	struct sock *sk, *reuse_sk;
+	bool prefetched;
+
+	sk = skb_steal_sock(skb, refcounted, &prefetched);
+	if (!sk)
+		return NULL;
+
+	if (!prefetched)
+		return sk;
+
+	if (sk->sk_protocol == IPPROTO_TCP) {
+		if (sk->sk_state != TCP_LISTEN)
+			return sk;
+	} else if (sk->sk_protocol == IPPROTO_UDP) {
+		if (sk->sk_state != TCP_CLOSE)
+			return sk;
+	} else {
+		return sk;
+	}
+
+	reuse_sk = inet6_lookup_reuseport(net, sk, skb, doff,
+					  saddr, sport, daddr, ntohs(dport),
+					  ehashfn);
+	if (!reuse_sk)
+		return sk;
+
+	/* We've chosen a new reuseport sock which is never refcounted. This
+	 * implies that sk also isn't refcounted.
+	 */
+	WARN_ON_ONCE(*refcounted);
+
+	return reuse_sk;
+}
+
 static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
 					      struct sk_buff *skb, int doff,
 					      const __be16 sport,
···
 					      int iif, int sdif,
 					      bool *refcounted)
 {
-	struct sock *sk = skb_steal_sock(skb, refcounted);
+	struct net *net = dev_net(skb_dst(skb)->dev);
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	struct sock *sk;
 
+	sk = inet6_steal_sock(net, skb, doff, &ip6h->saddr, sport, &ip6h->daddr, dport,
+			      refcounted, inet6_ehashfn);
+	if (IS_ERR(sk))
+		return NULL;
 	if (sk)
 		return sk;
 
-	return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
-			      doff, &ipv6_hdr(skb)->saddr, sport,
-			      &ipv6_hdr(skb)->daddr, ntohs(dport),
+	return __inet6_lookup(net, hashinfo, skb,
+			      doff, &ip6h->saddr, sport,
+			      &ip6h->daddr, ntohs(dport),
 			      iif, sdif, refcounted);
 }
 

include/net/inet_hashtables.h

···
 				       const __be32 daddr, const u16 hnum,
 				       const int dif, const int sdif);
 
+typedef u32 (inet_ehashfn_t)(const struct net *net,
+			      const __be32 laddr, const __u16 lport,
+			      const __be32 faddr, const __be16 fport);
+
+inet_ehashfn_t inet_ehashfn;
+
+INDIRECT_CALLABLE_DECLARE(inet_ehashfn_t udp_ehashfn);
+
+struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
+				   struct sk_buff *skb, int doff,
+				   __be32 saddr, __be16 sport,
+				   __be32 daddr, unsigned short hnum,
+				   inet_ehashfn_t *ehashfn);
+
+struct sock *inet_lookup_run_sk_lookup(struct net *net,
+				       int protocol,
+				       struct sk_buff *skb, int doff,
+				       __be32 saddr, __be16 sport,
+				       __be32 daddr, u16 hnum, const int dif,
+				       inet_ehashfn_t *ehashfn);
+
 static inline struct sock *
 	inet_lookup_established(struct net *net, struct inet_hashinfo *hashinfo,
 				const __be32 saddr, const __be16 sport,
···
 	return sk;
 }
 
+static inline
+struct sock *inet_steal_sock(struct net *net, struct sk_buff *skb, int doff,
+			     const __be32 saddr, const __be16 sport,
+			     const __be32 daddr, const __be16 dport,
+			     bool *refcounted, inet_ehashfn_t *ehashfn)
+{
+	struct sock *sk, *reuse_sk;
+	bool prefetched;
+
+	sk = skb_steal_sock(skb, refcounted, &prefetched);
+	if (!sk)
+		return NULL;
+
+	if (!prefetched)
+		return sk;
+
+	if (sk->sk_protocol == IPPROTO_TCP) {
+		if (sk->sk_state != TCP_LISTEN)
+			return sk;
+	} else if (sk->sk_protocol == IPPROTO_UDP) {
+		if (sk->sk_state != TCP_CLOSE)
+			return sk;
+	} else {
+		return sk;
+	}
+
+	reuse_sk = inet_lookup_reuseport(net, sk, skb, doff,
+					 saddr, sport, daddr, ntohs(dport),
+					 ehashfn);
+	if (!reuse_sk)
+		return sk;
+
+	/* We've chosen a new reuseport sock which is never refcounted. This
+	 * implies that sk also isn't refcounted.
+	 */
+	WARN_ON_ONCE(*refcounted);
+
+	return reuse_sk;
+}
+
 static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
 					     struct sk_buff *skb,
 					     int doff,
···
 					     const int sdif,
 					     bool *refcounted)
 {
-	struct sock *sk = skb_steal_sock(skb, refcounted);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 	const struct iphdr *iph = ip_hdr(skb);
+	struct sock *sk;
 
+	sk = inet_steal_sock(net, skb, doff, iph->saddr, sport, iph->daddr, dport,
+			     refcounted, inet_ehashfn);
+	if (IS_ERR(sk))
+		return NULL;
 	if (sk)
 		return sk;
 
-	return __inet_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
+	return __inet_lookup(net, hashinfo, skb,
 			     doff, iph->saddr, sport,
 			     iph->daddr, dport, inet_iif(skb), sdif,
 			     refcounted);
 }
-
-u32 inet6_ehashfn(const struct net *net,
-		  const struct in6_addr *laddr, const u16 lport,
-		  const struct in6_addr *faddr, const __be16 fport);
 
 static inline void sk_daddr_set(struct sock *sk, __be32 addr)
 {

include/net/mana/mana.h

···
 #ifndef _MANA_H
 #define _MANA_H
 
+#include <net/xdp.h>
+
 #include "gdma.h"
 #include "hw_channel.h"
 

include/net/netdev_rx_queue.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_NETDEV_RX_QUEUE_H
+#define _LINUX_NETDEV_RX_QUEUE_H
+
+#include <linux/kobject.h>
+#include <linux/netdevice.h>
+#include <linux/sysfs.h>
+#include <net/xdp.h>
+
+/* This structure contains an instance of an RX queue. */
+struct netdev_rx_queue {
+	struct xdp_rxq_info		xdp_rxq;
+#ifdef CONFIG_RPS
+	struct rps_map __rcu		*rps_map;
+	struct rps_dev_flow_table __rcu	*rps_flow_table;
+#endif
+	struct kobject			kobj;
+	struct net_device		*dev;
+	netdevice_tracker		dev_tracker;
+
+#ifdef CONFIG_XDP_SOCKETS
+	struct xsk_buff_pool            *pool;
+#endif
+} ____cacheline_aligned_in_smp;
+
+/*
+ * RX queue sysfs structures and functions.
+ */
+struct rx_queue_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
+	ssize_t (*store)(struct netdev_rx_queue *queue,
+			 const char *buf, size_t len);
+};
+
+static inline struct netdev_rx_queue *
+__netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
+{
+	return dev->_rx + rxq;
+}
+
+#ifdef CONFIG_SYSFS
+static inline unsigned int
+get_netdev_rx_queue_index(struct netdev_rx_queue *queue)
+{
+	struct net_device *dev = queue->dev;
+	int index = queue - dev->_rx;
+
+	BUG_ON(index >= dev->num_rx_queues);
+	return index;
+}
+#endif
+#endif

include/net/sock.h

···
  * skb_steal_sock - steal a socket from an sk_buff
  * @skb: sk_buff to steal the socket from
  * @refcounted: is set to true if the socket is reference-counted
+ * @prefetched: is set to true if the socket was assigned from bpf
  */
 static inline struct sock *
-skb_steal_sock(struct sk_buff *skb, bool *refcounted)
+skb_steal_sock(struct sk_buff *skb, bool *refcounted, bool *prefetched)
 {
 	if (skb->sk) {
 		struct sock *sk = skb->sk;
 
 		*refcounted = true;
-		if (skb_sk_is_prefetched(skb))
+		*prefetched = skb_sk_is_prefetched(skb);
+		if (*prefetched)
 			*refcounted = sk_is_refcounted(sk);
 		skb->destructor = NULL;
 		skb->sk = NULL;
 		return sk;
 	}
+	*prefetched = false;
 	*refcounted = false;
 	return NULL;
 }

include/net/xdp.h

···
 #ifndef __LINUX_NET_XDP_H__
 #define __LINUX_NET_XDP_H__
 
-#include <linux/skbuff.h> /* skb_shared_info */
-#include <uapi/linux/netdev.h>
 #include <linux/bitfield.h>
+#include <linux/filter.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h> /* skb_shared_info */
 
 /**
  * DOC: XDP RX-queue information
···
 	MEM_TYPE_XSK_BUFF_POOL,
 	MEM_TYPE_MAX,
 };
-
-typedef u32 xdp_features_t;
 
 /* XDP flags for ndo_xdp_xmit */
 #define XDP_XMIT_FLUSH		(1U << 0)	/* doorbell signal consumer */
···
 	XDP_RSS_TYPE_L4_IPV6_SCTP_EX = XDP_RSS_TYPE_L4_IPV6_SCTP | XDP_RSS_L3_DYNHDR,
 };
 
+struct xdp_metadata_ops {
+	int	(*xmo_rx_timestamp)(const struct xdp_md *ctx, u64 *timestamp);
+	int	(*xmo_rx_hash)(const struct xdp_md *ctx, u32 *hash,
+			       enum xdp_rss_hash_type *rss_type);
+};
+
 #ifdef CONFIG_NET
 u32 bpf_xdp_metadata_kfunc_id(int id);
 bool bpf_dev_bound_kfunc_id(u32 btf_id);
···
 	xdp_set_features_flag(dev, 0);
 }
 
+static __always_inline u32 bpf_prog_run_xdp(const struct bpf_prog *prog,
+					    struct xdp_buff *xdp)
+{
+	/* Driver XDP hooks are invoked within a single NAPI poll cycle and thus
+	 * under local_bh_disable(), which provides the needed RCU protection
+	 * for accessing map entries.
+	 */
+	u32 act = __bpf_prog_run(prog, xdp, BPF_DISPATCHER_FUNC(xdp));
+
+	if (static_branch_unlikely(&bpf_master_redirect_enabled_key)) {
+		if (act == XDP_TX && netif_is_bond_slave(xdp->rxq->dev))
+			act = xdp_master_redirect(xdp);
+	}
+
+	return act;
+}
 #endif /* __LINUX_NET_XDP_H__ */

include/trace/events/xdp.h

···
 #include <linux/filter.h>
 #include <linux/tracepoint.h>
 #include <linux/bpf.h>
+#include <net/xdp.h>
 
 #define __XDP_ACT_MAP(FN)	\
 	FN(ABORTED)		\
···
 		  __print_symbolic(__entry->mem_type, __MEM_TYPE_SYM_TAB),
 		  __entry->page
 	)
+);
+
+TRACE_EVENT(bpf_xdp_link_attach_failed,
+
+	TP_PROTO(const char *msg),
+
+	TP_ARGS(msg),
+
+	TP_STRUCT__entry(
+		__string(msg, msg)
+	),
+
+	TP_fast_assign(
+		__assign_str(msg, msg);
+	),
+
+	TP_printk("errmsg=%s", __get_str(msg))
 );
 
 #endif /* _TRACE_XDP_H */

include/uapi/linux/bpf.h

···
 
 /* ld/ldx fields */
 #define BPF_DW		0x18	/* double word (64-bit) */
+#define BPF_MEMSX	0x80	/* load with sign extension */
 #define BPF_ATOMIC	0xc0	/* atomic memory ops - op type in immediate */
 #define BPF_XADD	0xc0	/* exclusive add - legacy name */
 
···
  * BPF_TRACE_KPROBE_MULTI attach type to create return probe.
  */
 #define BPF_F_KPROBE_MULTI_RETURN	(1U << 0)
+
+/* link_create.netfilter.flags used in LINK_CREATE command for
+ * BPF_PROG_TYPE_NETFILTER to enable IP packet defragmentation.
+ */
+#define BPF_F_NETFILTER_IP_DEFRAG (1U << 0)
 
 /* When BPF ldimm64's insn[0].src_reg != 0 then this can have
  * the following extensions:
···
  *
  *		**-EOPNOTSUPP** if the operation is not supported, for example
  *		a call from outside of TC ingress.
- *
- *		**-ESOCKTNOSUPPORT** if the socket type is not supported
- *		(reuseport).
  *
  * long bpf_sk_assign(struct bpf_sk_lookup *ctx, struct bpf_sock *sk, u64 flags)
  *	Description

kernel/bpf/btf.c

···
 #include <net/netfilter/nf_bpf_link.h>
 
 #include <net/sock.h>
+#include <net/xdp.h>
 #include "../tools/lib/bpf/relo_core.h"
 
 /* BTF (BPF Type Format) is the meta data format which describes

kernel/bpf/core.c

···
 #define AX	regs[BPF_REG_AX]
 #define ARG1	regs[BPF_REG_ARG1]
 #define CTX	regs[BPF_REG_CTX]
+#define OFF	insn->off
 #define IMM	insn->imm
 
 struct bpf_mem_alloc bpf_global_ma;
···
 {
 	const s32 off_min = S16_MIN, off_max = S16_MAX;
 	s32 delta = end_new - end_old;
-	s32 off = insn->off;
+	s32 off;
+
+	if (insn->code == (BPF_JMP32 | BPF_JA))
+		off = insn->imm;
+	else
+		off = insn->off;
 
 	if (curr < pos && curr + off + 1 >= end_old)
 		off += delta;
···
 		off -= delta;
 	if (off < off_min || off > off_max)
 		return -ERANGE;
-	if (!probe_pass)
-		insn->off = off;
+	if (!probe_pass) {
+		if (insn->code == (BPF_JMP32 | BPF_JA))
+			insn->imm = off;
+		else
+			insn->off = off;
+	}
 	return 0;
 }
 
···
 	case BPF_ALU | BPF_MOD | BPF_K:
 		*to++ = BPF_ALU32_IMM(BPF_MOV, BPF_REG_AX, imm_rnd ^ from->imm);
 		*to++ = BPF_ALU32_IMM(BPF_XOR, BPF_REG_AX, imm_rnd);
-		*to++ = BPF_ALU32_REG(from->code, from->dst_reg, BPF_REG_AX);
+		*to++ = BPF_ALU32_REG_OFF(from->code, from->dst_reg, BPF_REG_AX, from->off);
 		break;
 
 	case BPF_ALU64 | BPF_ADD | BPF_K:
···
 	case BPF_ALU64 | BPF_MOD | BPF_K:
 		*to++ = BPF_ALU64_IMM(BPF_MOV, BPF_REG_AX, imm_rnd ^ from->imm);
 		*to++ = BPF_ALU64_IMM(BPF_XOR, BPF_REG_AX, imm_rnd);
-		*to++ = BPF_ALU64_REG(from->code, from->dst_reg, BPF_REG_AX);
+		*to++ = BPF_ALU64_REG_OFF(from->code, from->dst_reg, BPF_REG_AX, from->off);
 		break;
 
 	case BPF_JMP | BPF_JEQ  | BPF_K:
···
 	INSN_3(ALU64, DIV,  X),			\
 	INSN_3(ALU64, MOD,  X),			\
 	INSN_2(ALU64, NEG),			\
+	INSN_3(ALU64, END, TO_LE),		\
 	/*   Immediate based. */		\
 	INSN_3(ALU64, ADD,  K),			\
 	INSN_3(ALU64, SUB,  K),			\
···
 	INSN_3(JMP, JSLE, K),			\
 	INSN_3(JMP, JSET, K),			\
 	INSN_2(JMP, JA),			\
+	INSN_2(JMP32, JA),			\
 	/* Store instructions. */		\
 	/*   Register based. */			\
 	INSN_3(STX, MEM,  B),			\
···
 	INSN_3(LDX, MEM, H),			\
 	INSN_3(LDX, MEM, W),			\
 	INSN_3(LDX, MEM, DW),			\
+	INSN_3(LDX, MEMSX, B),			\
+	INSN_3(LDX, MEMSX, H),			\
+	INSN_3(LDX, MEMSX, W),			\
 	/*   Immediate based. */		\
 	INSN_3(LD, IMM, DW)
 
···
 }
 
 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
-u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
-{
-	memset(dst, 0, size);
-	return -EFAULT;
-}
-
 /**
  *	___bpf_prog_run - run eBPF program on a given context
  *	@regs: is the array of MAX_BPF_EXT_REG eBPF pseudo-registers
···
 		[BPF_LDX | BPF_PROBE_MEM | BPF_H] = &&LDX_PROBE_MEM_H,
 		[BPF_LDX | BPF_PROBE_MEM | BPF_W] = &&LDX_PROBE_MEM_W,
 		[BPF_LDX | BPF_PROBE_MEM | BPF_DW] = &&LDX_PROBE_MEM_DW,
+		[BPF_LDX | BPF_PROBE_MEMSX | BPF_B] = &&LDX_PROBE_MEMSX_B,
+		[BPF_LDX | BPF_PROBE_MEMSX | BPF_H] = &&LDX_PROBE_MEMSX_H,
+		[BPF_LDX | BPF_PROBE_MEMSX | BPF_W] = &&LDX_PROBE_MEMSX_W,
 	};
 #undef BPF_INSN_3_LBL
 #undef BPF_INSN_2_LBL
···
 		DST = -DST;
 		CONT;
 	ALU_MOV_X:
-		DST = (u32) SRC;
+		switch (OFF) {
+		case 0:
+			DST = (u32) SRC;
+			break;
+		case 8:
+			DST = (u32)(s8) SRC;
+			break;
+		case 16:
+			DST = (u32)(s16) SRC;
+			break;
+		}
 		CONT;
 	ALU_MOV_K:
 		DST = (u32) IMM;
 		CONT;
 	ALU64_MOV_X:
-		DST = SRC;
+		switch (OFF) {
+		case 0:
+			DST = SRC;
+			break;
+		case 8:
+			DST = (s8) SRC;
+			break;
+		case 16:
+			DST = (s16) SRC;
+			break;
+		case 32:
+			DST = (s32) SRC;
+			break;
+		}
 		CONT;
 	ALU64_MOV_K:
 		DST = IMM;
···
 		(*(s64 *) &DST) >>= IMM;
 		CONT;
 	ALU64_MOD_X:
-		div64_u64_rem(DST, SRC, &AX);
-		DST = AX;
+		switch (OFF) {
+		case 0:
+			div64_u64_rem(DST, SRC, &AX);
+			DST = AX;
+			break;
+		case 1:
+			AX = div64_s64(DST, SRC);
+			DST = DST - AX * SRC;
+			break;
+		}
 		CONT;
 	ALU_MOD_X:
-		AX = (u32) DST;
-		DST = do_div(AX, (u32) SRC);
+		switch (OFF) {
+		case 0:
+			AX = (u32) DST;
+			DST = do_div(AX, (u32) SRC);
+			break;
+		case 1:
+			AX = abs((s32)DST);
+			AX = do_div(AX, abs((s32)SRC));
+			if ((s32)DST < 0)
+				DST = (u32)-AX;
+			else
+				DST = (u32)AX;
+			break;
+		}
 		CONT;
 	ALU64_MOD_K:
-		div64_u64_rem(DST, IMM, &AX);
-		DST = AX;
+		switch (OFF) {
+		case 0:
+			div64_u64_rem(DST, IMM, &AX);
+			DST = AX;
+			break;
+		case 1:
+			AX = div64_s64(DST, IMM);
+			DST = DST - AX * IMM;
+			break;
+		}
 		CONT;
 	ALU_MOD_K:
-		AX = (u32) DST;
-		DST = do_div(AX, (u32) IMM);
+		switch (OFF) {
+		case 0:
+			AX = (u32) DST;
+			DST = do_div(AX, (u32) IMM);
+			break;
+		case 1:
+			AX = abs((s32)DST);
+			AX = do_div(AX, abs((s32)IMM));
+			if ((s32)DST < 0)
+				DST = (u32)-AX;
+			else
+				DST = (u32)AX;
+			break;
+		}
 		CONT;
 	ALU64_DIV_X:
-		DST = div64_u64(DST, SRC);
+		switch (OFF) {
+		case 0:
+			DST = div64_u64(DST, SRC);
+			break;
+		case 1:
+			DST = div64_s64(DST, SRC);
+			break;
+		}
 		CONT;
 	ALU_DIV_X:
-		AX = (u32) DST;
-		do_div(AX, (u32) SRC);
-		DST = (u32) AX;
+		switch (OFF) {
+		case 0:
+			AX = (u32) DST;
+			do_div(AX, (u32) SRC);
+			DST = (u32) AX;
+			break;
+		case 1:
+			AX = abs((s32)DST);
+			do_div(AX, abs((s32)SRC));
+			if (((s32)DST < 0) == ((s32)SRC < 0))
+				DST = (u32)AX;
+			else
+				DST = (u32)-AX;
+			break;
+		}
 		CONT;
 	ALU64_DIV_K:
-		DST = div64_u64(DST, IMM);
+		switch (OFF) {
+		case 0:
+			DST = div64_u64(DST, IMM);
+			break;
+		case 1:
+			DST = div64_s64(DST, IMM);
+			break;
+		}
 		CONT;
 	ALU_DIV_K:
-		AX = (u32) DST;
-		do_div(AX, (u32) IMM);
-		DST = (u32) AX;
+		switch (OFF) {
+		case 0:
+			AX = (u32) DST;
+			do_div(AX, (u32) IMM);
+			DST = (u32) AX;
+			break;
+		case 1:
+			AX = abs((s32)DST);
+			do_div(AX, abs((s32)IMM));
+			if (((s32)DST < 0) == ((s32)IMM < 0))
+				DST = (u32)AX;
+			else
+				DST = (u32)-AX;
+			break;
+		}
 		CONT;
 	ALU_END_TO_BE:
 		switch (IMM) {
···
 			break;
 		case 64:
 			DST = (__force u64) cpu_to_le64(DST);
+			break;
+		}
+		CONT;
+	ALU64_END_TO_LE:
+		switch (IMM) {
+		case 16:
+			DST = (__force u16) __swab16(DST);
+			break;
+		case 32:
+			DST = (__force u32) __swab32(DST);
+			break;
+		case 64:
+			DST = (__force u64) __swab64(DST);
 			break;
 		}
 		CONT;
···
 	}
 	JMP_JA:
 		insn += insn->off;
+		CONT;
+	JMP32_JA:
+		insn += insn->imm;
 		CONT;
 	JMP_EXIT:
 		return BPF_R0;
···
 		DST = *(SIZE *)(unsigned long) (SRC + insn->off);	\
 		CONT;							\
 	LDX_PROBE_MEM_##SIZEOP:						\
-		bpf_probe_read_kernel(&DST, sizeof(SIZE),		\
-				      (const void *)(long) (SRC + insn->off));	\
+		bpf_probe_read_kernel_common(&DST, sizeof(SIZE),	\
+			      (const void *)(long) (SRC + insn->off));	\
 		DST = *((SIZE *)&DST);					\
 		CONT;
 
···
 	LDST(W,  u32)
 	LDST(DW, u64)
 #undef LDST
+
+#define LDSX(SIZEOP, SIZE)						\
+	LDX_MEMSX_##SIZEOP:						\
+		DST = *(SIZE *)(unsigned long) (SRC + insn->off);	\
+		CONT;							\
+	LDX_PROBE_MEMSX_##SIZEOP:					\
+		bpf_probe_read_kernel_common(&DST, sizeof(SIZE),		\
+				      (const void *)(long) (SRC + insn->off));	\
+		DST = *((SIZE *)&DST);					\
+		CONT;
+
+	LDSX(B,   s8)
+	LDSX(H,  s16)
+	LDSX(W,  s32)
+#undef LDSX
 
 #define ATOMIC_ALU_OP(BOP, KOP)						\
 		case BOP:						\

kernel/bpf/cpumap.c

···
 	/* XDP can run multiple RX-ring queues, need __percpu enqueue store */
 	struct xdp_bulk_queue __percpu *bulkq;
 
-	struct bpf_cpu_map *cmap;
-
 	/* Queue with potential multi-producers, and single-consumer kthread */
 	struct ptr_ring *queue;
 	struct task_struct *kthread;
···
 		rcpu = __cpu_map_entry_alloc(map, &cpumap_value, key_cpu);
 		if (!rcpu)
 			return -ENOMEM;
-		rcpu->cmap = cmap;
 	}
 	rcu_read_lock();
 	__cpu_map_entry_replace(cmap, key_cpu, rcpu);

kernel/bpf/devmap.c

···
 struct bpf_dtab_netdev {
 	struct net_device *dev; /* must be first member, due to tracepoint */
 	struct hlist_node index_hlist;
-	struct bpf_dtab *dtab;
 	struct bpf_prog *xdp_prog;
 	struct rcu_head rcu;
 	unsigned int idx;
···
 	}
 
 	dev->idx = idx;
-	dev->dtab = dtab;
 	if (prog) {
 		dev->xdp_prog = prog;
 		dev->val.bpf_prog.id = prog->aux->id;

kernel/bpf/disasm.c

···
 	[BPF_END >> 4]  = "endian",
 };
 
+const char *const bpf_alu_sign_string[16] = {
+	[BPF_DIV >> 4]  = "s/=",
+	[BPF_MOD >> 4]  = "s%=",
+};
+
+const char *const bpf_movsx_string[4] = {
+	[0] = "(s8)",
+	[1] = "(s16)",
+	[3] = "(s32)",
+};
+
 static const char *const bpf_atomic_alu_string[16] = {
 	[BPF_ADD >> 4]  = "add",
 	[BPF_AND >> 4]  = "and",
···
 	[BPF_H >> 3]  = "u16",
 	[BPF_B >> 3]  = "u8",
 	[BPF_DW >> 3] = "u64",
+};
+
+static const char *const bpf_ldsx_string[] = {
+	[BPF_W >> 3]  = "s32",
+	[BPF_H >> 3]  = "s16",
+	[BPF_B >> 3]  = "s8",
 };
 
 static const char *const bpf_jmp_string[16] = {
···
 		insn->imm, insn->dst_reg);
 }
 
+static void print_bpf_bswap_insn(bpf_insn_print_t verbose,
+			       void *private_data,
+			       const struct bpf_insn *insn)
+{
+	verbose(private_data, "(%02x) r%d = bswap%d r%d\n",
+		insn->code, insn->dst_reg,
+		insn->imm, insn->dst_reg);
+}
+
+static bool is_sdiv_smod(const struct bpf_insn *insn)
+{
+	return (BPF_OP(insn->code)  == BPF_DIV || BPF_OP(insn->code) == BPF_MOD) &&
+	       insn->off == 1;
+}
+
+static bool is_movsx(const struct bpf_insn *insn)
+{
+	return BPF_OP(insn->code) == BPF_MOV &&
+	       (insn->off == 8 || insn->off == 16 || insn->off == 32);
+}
+
 void print_bpf_insn(const struct bpf_insn_cbs *cbs,
 		    const struct bpf_insn *insn,
 		    bool allow_ptr_leaks)
···
 	if (class == BPF_ALU || class == BPF_ALU64) {
 		if (BPF_OP(insn->code) == BPF_END) {
 			if (class == BPF_ALU64)
-				verbose(cbs->private_data, "BUG_alu64_%02x\n", insn->code);
+				print_bpf_bswap_insn(verbose, cbs->private_data, insn);
 			else
 				print_bpf_end_insn(verbose, cbs->private_data, insn);
 		} else if (BPF_OP(insn->code) == BPF_NEG) {
···
 				insn->dst_reg, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg);
 		} else if (BPF_SRC(insn->code) == BPF_X) {
-			verbose(cbs->private_data, "(%02x) %c%d %s %c%d\n",
+			verbose(cbs->private_data, "(%02x) %c%d %s %s%c%d\n",
 				insn->code, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg,
-				bpf_alu_string[BPF_OP(insn->code) >> 4],
+				is_sdiv_smod(insn) ? bpf_alu_sign_string[BPF_OP(insn->code) >> 4]
+						   : bpf_alu_string[BPF_OP(insn->code) >> 4],
+				is_movsx(insn) ? bpf_movsx_string[(insn->off >> 3) - 1] : "",
 				class == BPF_ALU ? 'w' : 'r',
 				insn->src_reg);
 		} else {
 			verbose(cbs->private_data, "(%02x) %c%d %s %d\n",
 				insn->code, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg,
-				bpf_alu_string[BPF_OP(insn->code) >> 4],
+				is_sdiv_smod(insn) ? bpf_alu_sign_string[BPF_OP(insn->code) >> 4]
+						   : bpf_alu_string[BPF_OP(insn->code) >> 4],
 				insn->imm);
 		}
 	} else if (class == BPF_STX) {
···
 			verbose(cbs->private_data, "BUG_st_%02x\n", insn->code);
 		}
 	} else if (class == BPF_LDX) {
-		if (BPF_MODE(insn->code) != BPF_MEM) {
+		if (BPF_MODE(insn->code) != BPF_MEM && BPF_MODE(insn->code) != BPF_MEMSX) {
 			verbose(cbs->private_data, "BUG_ldx_%02x\n", insn->code);
 			return;
 		}
 		verbose(cbs->private_data, "(%02x) r%d = *(%s *)(r%d %+d)\n",
 			insn->code, insn->dst_reg,
-			bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
+			BPF_MODE(insn->code) == BPF_MEM ?
+				 bpf_ldst_string[BPF_SIZE(insn->code) >> 3] :
+				 bpf_ldsx_string[BPF_SIZE(insn->code) >> 3],
 			insn->src_reg, insn->off);
 	} else if (class == BPF_LD) {
 		if (BPF_MODE(insn->code) == BPF_ABS) {
···
 		} else if (insn->code == (BPF_JMP | BPF_JA)) {
 			verbose(cbs->private_data, "(%02x) goto pc%+d\n",
 				insn->code, insn->off);
+		} else if (insn->code == (BPF_JMP32 | BPF_JA)) {
+			verbose(cbs->private_data, "(%02x) gotol pc%+d\n",
+				insn->code, insn->imm);
 		} else if (insn->code == (BPF_JMP | BPF_EXIT)) {
 			verbose(cbs->private_data, "(%02x) exit\n", insn->code);
 		} else if (BPF_SRC(insn->code) == BPF_X) {

kernel/bpf/memalloc.c

···
 	WARN_ON_ONCE(local_inc_return(&c->active) != 1);
 }
 
-static void dec_active(struct bpf_mem_cache *c, unsigned long flags)
+static void dec_active(struct bpf_mem_cache *c, unsigned long *flags)
 {
 	local_dec(&c->active);
 	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-		local_irq_restore(flags);
+		local_irq_restore(*flags);
 }
 
 static void add_obj_to_free_list(struct bpf_mem_cache *c, void *obj)
···
 	inc_active(c, &flags);
 	__llist_add(obj, &c->free_llist);
 	c->free_cnt++;
-	dec_active(c, flags);
+	dec_active(c, &flags);
 }
 
 /* Mostly runs from irq_work except __init phase. */
-static void alloc_bulk(struct bpf_mem_cache *c, int cnt, int node)
+static void alloc_bulk(struct bpf_mem_cache *c, int cnt, int node, bool atomic)
 {
 	struct mem_cgroup *memcg = NULL, *old_memcg;
+	gfp_t gfp;
 	void *obj;
 	int i;
+
+	gfp = __GFP_NOWARN | __GFP_ACCOUNT;
+	gfp |= atomic ? GFP_NOWAIT : GFP_KERNEL;
 
 	for (i = 0; i < cnt; i++) {
 		/*
···
 		 * will allocate from the current numa node which is what we
 		 * want here.
 		 */
-		obj = __alloc(c, node, GFP_NOWAIT | __GFP_NOWARN | __GFP_ACCOUNT);
+		obj = __alloc(c, node, gfp);
 		if (!obj)
 			break;
 		add_obj_to_free_list(c, obj);
···
 			cnt = --c->free_cnt;
 		else
 			cnt = 0;
-		dec_active(c, flags);
+		dec_active(c, &flags);
 		if (llnode)
 			enque_to_free(tgt, llnode);
 	} while (cnt > (c->high_watermark + c->low_watermark) / 2);
···
 		llist_for_each_safe(llnode, t, llist_del_all(&c->free_llist_extra_rcu))
 			if (__llist_add(llnode, &c->free_by_rcu))
 				c->free_by_rcu_tail = llnode;
-		dec_active(c, flags);
+		dec_active(c, &flags);
 	}
 
 	if (llist_empty(&c->free_by_rcu))
···
 	inc_active(c, &flags);
 	WRITE_ONCE(c->waiting_for_gp.first, __llist_del_all(&c->free_by_rcu));
 	c->waiting_for_gp_tail = c->free_by_rcu_tail;
-	dec_active(c, flags);
+	dec_active(c, &flags);
 
 	if (unlikely(READ_ONCE(c->draining))) {
 		free_all(llist_del_all(&c->waiting_for_gp), !!c->percpu_size);
···
 		/* irq_work runs on this cpu and kmalloc will allocate
 		 * from the current numa node which is what we want here.
 		 */
-		alloc_bulk(c, c->batch, NUMA_NO_NODE);
+		alloc_bulk(c, c->batch, NUMA_NO_NODE, true);
 	else if (cnt > c->high_watermark)
 		free_bulk(c);
 
···
 	 * prog won't be doing more than 4 map_update_elem from
 	 * irq disabled region
 	 */
-	alloc_bulk(c, c->unit_size <= 256 ? 4 : 1, cpu_to_node(cpu));
+	alloc_bulk(c, c->unit_size <= 256 ? 4 : 1, cpu_to_node(cpu), false);
 }
 
 /* When size != 0 bpf_mem_cache for each cpu.

kernel/bpf/offload.c

···
 #include <linux/rhashtable.h>
 #include <linux/rtnetlink.h>
 #include <linux/rwsem.h>
+#include <net/xdp.h>
 
 /* Protects offdevs, members of bpf_offload_netdev and offload members
  * of all progs.

kernel/bpf/verifier.c

···
 #include <linux/poison.h>
 #include <linux/module.h>
 #include <linux/cpumask.h>
+#include <net/xdp.h>
 
 #include "disasm.h"
 
···
 			goto next;
 		if (BPF_OP(code) == BPF_EXIT || BPF_OP(code) == BPF_CALL)
 			goto next;
-		off = i + insn[i].off + 1;
+		if (code == (BPF_JMP32 | BPF_JA))
+			off = i + insn[i].imm + 1;
+		else
+			off = i + insn[i].off + 1;
 		if (off < subprog_start || off >= subprog_end) {
 			verbose(env, "jump out of range from insn %d to %d\n", i, off);
 			return -EINVAL;
···
 			 * or unconditional jump back
 			 */
 			if (code != (BPF_JMP | BPF_EXIT) &&
+			    code != (BPF_JMP32 | BPF_JA) &&
 			    code != (BPF_JMP | BPF_JA)) {
 				verbose(env, "last insn is not an exit or jmp\n");
 				return -EINVAL;
···
 		}
 	}
 
+	if (class == BPF_ALU64 && op == BPF_END && (insn->imm == 16 || insn->imm == 32))
+		return false;
+
 	if (class == BPF_ALU64 || class == BPF_JMP ||
-	    /* BPF_END always use BPF_ALU class. */
 	    (class == BPF_ALU && op == BPF_END && insn->imm == 64))
 		return true;
 
···
 			return 0;
 		if (opcode == BPF_MOV) {
 			if (BPF_SRC(insn->code) == BPF_X) {
-				/* dreg = sreg
+				/* dreg = sreg or dreg = (s8, s16, s32)sreg
 				 * dreg needs precision after this insn
 				 * sreg needs precision before this insn
 				 */
···
 	__reg_combine_64_into_32(reg);
 }
 
+static void set_sext64_default_val(struct bpf_reg_state *reg, int size)
+{
+	if (size == 1) {
+		reg->smin_value = reg->s32_min_value = S8_MIN;
+		reg->smax_value = reg->s32_max_value = S8_MAX;
+	} else if (size == 2) {
+		reg->smin_value = reg->s32_min_value = S16_MIN;
+		reg->smax_value = reg->s32_max_value = S16_MAX;
+	} else {
+		/* size == 4 */
+		reg->smin_value = reg->s32_min_value = S32_MIN;
+		reg->smax_value = reg->s32_max_value = S32_MAX;
+	}
+	reg->umin_value = reg->u32_min_value = 0;
+	reg->umax_value = U64_MAX;
+	reg->u32_max_value = U32_MAX;
+	reg->var_off = tnum_unknown;
+}
+
+static void coerce_reg_to_size_sx(struct bpf_reg_state *reg, int size)
+{
+	s64 init_s64_max, init_s64_min, s64_max, s64_min, u64_cval;
+	u64 top_smax_value, top_smin_value;
+	u64 num_bits = size * 8;
+
+	if (tnum_is_const(reg->var_off)) {
+		u64_cval = reg->var_off.value;
+		if (size == 1)
+			reg->var_off = tnum_const((s8)u64_cval);
+		else if (size == 2)
+			reg->var_off = tnum_const((s16)u64_cval);
+		else
+			/* size == 4 */
+			reg->var_off = tnum_const((s32)u64_cval);
+
+		u64_cval = reg->var_off.value;
+		reg->smax_value = reg->smin_value = u64_cval;
+		reg->umax_value = reg->umin_value = u64_cval;
+		reg->s32_max_value = reg->s32_min_value = u64_cval;
+		reg->u32_max_value = reg->u32_min_value = u64_cval;
+		return;
+	}
+
+	top_smax_value = ((u64)reg->smax_value >> num_bits) << num_bits;
+	top_smin_value = ((u64)reg->smin_value >> num_bits) << num_bits;
+
+	if (top_smax_value != top_smin_value)
+		goto out;
+
+	/* find the s64_min and s64_min after sign extension */
+	if (size == 1) {
+		init_s64_max = (s8)reg->smax_value;
+		init_s64_min = (s8)reg->smin_value;
+	} else if (size == 2) {
+		init_s64_max = (s16)reg->smax_value;
+		init_s64_min = (s16)reg->smin_value;
+	} else {
+		init_s64_max = (s32)reg->smax_value;
+		init_s64_min = (s32)reg->smin_value;
+	}
+
+	s64_max = max(init_s64_max, init_s64_min);
+	s64_min = min(init_s64_max, init_s64_min);
+
+	/* both of s64_max/s64_min positive or negative */
+	if ((s64_max >= 0) == (s64_min >= 0)) {
+		reg->smin_value = reg->s32_min_value = s64_min;
+		reg->smax_value = reg->s32_max_value = s64_max;
+		reg->umin_value = reg->u32_min_value = s64_min;
+		reg->umax_value = reg->u32_max_value = s64_max;
+		reg->var_off = tnum_range(s64_min, s64_max);
+		return;
+	}
+
+out:
+	set_sext64_default_val(reg, size);
+}
+
+static void set_sext32_default_val(struct bpf_reg_state *reg, int size)
+{
+	if (size == 1) {
+		reg->s32_min_value = S8_MIN;
+		reg->s32_max_value = S8_MAX;
+	} else {
+		/* size == 2 */
+		reg->s32_min_value = S16_MIN;
+		reg->s32_max_value = S16_MAX;
+	}
+	reg->u32_min_value = 0;
+	reg->u32_max_value = U32_MAX;
+}
+
+static void coerce_subreg_to_size_sx(struct bpf_reg_state *reg, int size)
+{
+	s32 init_s32_max, init_s32_min, s32_max, s32_min, u32_val;
+	u32 top_smax_value, top_smin_value;
+	u32 num_bits = size * 8;
+
+	if (tnum_is_const(reg->var_off)) {
+		u32_val = reg->var_off.value;
+		if (size == 1)
+			reg->var_off = tnum_const((s8)u32_val);
+		else
+			reg->var_off = tnum_const((s16)u32_val);
+
+		u32_val = reg->var_off.value;
+		reg->s32_min_value = reg->s32_max_value = u32_val;
+		reg->u32_min_value = reg->u32_max_value = u32_val;
+		return;
+	}
+
+	top_smax_value = ((u32)reg->s32_max_value >> num_bits) << num_bits;
+	top_smin_value = ((u32)reg->s32_min_value >> num_bits) << num_bits;
+
+	if (top_smax_value != top_smin_value)
+		goto out;
+
+	/* find the s32_min and s32_min after sign extension */
+	if (size == 1) {
+		init_s32_max = (s8)reg->s32_max_value;
+		init_s32_min = (s8)reg->s32_min_value;
+	} else {
+		/* size == 2 */
+		init_s32_max = (s16)reg->s32_max_value;
+		init_s32_min = (s16)reg->s32_min_value;
+	}
+	s32_max = max(init_s32_max, init_s32_min);
+	s32_min = min(init_s32_max, init_s32_min);
+
+	if ((s32_min >= 0) == (s32_max >= 0)) {
+		reg->s32_min_value = s32_min;
+		reg->s32_max_value = s32_max;
+		reg->u32_min_value = (u32)s32_min;
+		reg->u32_max_value = (u32)s32_max;
+		return;
+	}
+
+out:
+	set_sext32_default_val(reg, size);
+}
+
 static bool bpf_map_is_rdonly(const struct bpf_map *map)
 {
 	/* A map is considered read-only if the following condition are true:
···
 	       !bpf_map_write_active(map);
 }
 
-static int bpf_map_direct_read(struct bpf_map *map, int off, int size, u64 *val)
+static int bpf_map_direct_read(struct bpf_map *map, int off, int size, u64 *val,
+			       bool is_ldsx)
 {
 	void *ptr;
 	u64 addr;
···
 
 	switch (size) {
 	case sizeof(u8):
-		*val = (u64)*(u8 *)ptr;
+		*val = is_ldsx ? (s64)*(s8 *)ptr : (u64)*(u8 *)ptr;
 		break;
 	case sizeof(u16):
-		*val = (u64)*(u16 *)ptr;
+		*val = is_ldsx ? (s64)*(s16 *)ptr : (u64)*(u16 *)ptr;
 		break;
 	case sizeof(u32):
-		*val = (u64)*(u32 *)ptr;
+		*val = is_ldsx ? (s64)*(s32 *)ptr : (u64)*(u32 *)ptr;
 		break;
 	case sizeof(u64):
 		*val = *(u64 *)ptr;
···
  */
 static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regno,
 			    int off, int bpf_size, enum bpf_access_type t,
-			    int value_regno, bool strict_alignment_once)
+			    int value_regno, bool strict_alignment_once, bool is_ldsx)
 {
 	struct bpf_reg_state *regs = cur_regs(env);
 	struct bpf_reg_state *reg = regs + regno;
···
 				u64 val = 0;
 
 				err = bpf_map_direct_read(map, map_off, size,
-							  &val);
+							  &val, is_ldsx);
 				if (err)
 					return err;
 
···
 
 	if (!err && size < BPF_REG_SIZE && value_regno >= 0 && t == BPF_READ &&
 	    regs[value_regno].type == SCALAR_VALUE) {
-		/* b/h/w load zero-extends, mark upper bits as known 0 */
-		coerce_reg_to_size(&regs[value_regno], size);
+		if (!is_ldsx)
+			/* b/h/w load zero-extends, mark upper bits as known 0 */
+			coerce_reg_to_size(&regs[value_regno], size);
+		else
+			coerce_reg_to_size_sx(&regs[value_regno], size);
 	}
 	return err;
 }
···
 	 * case to simulate the register fill.
 	 */
 	err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
-			       BPF_SIZE(insn->code), BPF_READ, -1, true);
+			       BPF_SIZE(insn->code), BPF_READ, -1, true, false);
 	if (!err && load_reg >= 0)
 		err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
 				       BPF_SIZE(insn->code), BPF_READ, load_reg,
-				       true);
+				       true, false);
 	if (err)
 		return err;
 
 	/* Check whether we can write into the same memory. */
 	err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
-			       BPF_SIZE(insn->code), BPF_WRITE, -1, true);
+			       BPF_SIZE(insn->code), BPF_WRITE, -1, true, false);
 	if (err)
 		return err;
 
···
 				return zero_size_allowed ? 0 : -EACCES;
 
 			return check_mem_access(env, env->insn_idx, regno, offset, BPF_B,
-						atype, -1, false);
+						atype, -1, false, false);
 		}
 
 		fallthrough;
···
 		/* we write BPF_DW bits (8 bytes) at a time */
 		for (i = 0; i < BPF_DYNPTR_SIZE; i += 8) {
 			err = check_mem_access(env, insn_idx, regno,
-					       i, BPF_DW, BPF_WRITE, -1, false);
+					       i, BPF_DW, BPF_WRITE, -1, false, false);
 			if (err)
 				return err;
 		}
···
 
 		for (i = 0; i < nr_slots * 8; i += BPF_REG_SIZE) {
 			err = check_mem_access(env, insn_idx, regno,
-					       i, BPF_DW, BPF_WRITE, -1, false);
+					       i, BPF_DW, BPF_WRITE, -1, false, false);
 			if (err)
 				return err;
 		}
···
 	 */
 	for (i = 0; i < meta.access_size; i++) {
 		err = check_mem_access(env, insn_idx, meta.regno, i, BPF_B,
-				       BPF_WRITE, -1, false);
+				       BPF_WRITE, -1, false, false);
 		if (err)
 			return err;
 	}
···
 		} else {
 			if (insn->src_reg != BPF_REG_0 || insn->off != 0 ||
 			    (insn->imm != 16 && insn->imm != 32 && insn->imm != 64) ||
-			    BPF_CLASS(insn->code) == BPF_ALU64) {
+			    (BPF_CLASS(insn->code) == BPF_ALU64 &&
+			     BPF_SRC(insn->code) != BPF_TO_LE)) {
 				verbose(env, "BPF_END uses reserved fields\n");
 				return -EINVAL;
 			}
···
 	} else if (opcode == BPF_MOV) {
 
 		if (BPF_SRC(insn->code) == BPF_X) {
-			if (insn->imm != 0 || insn->off != 0) {
+			if (insn->imm != 0) {
 				verbose(env, "BPF_MOV uses reserved fields\n");
 				return -EINVAL;
+			}
+
+			if (BPF_CLASS(insn->code) == BPF_ALU) {
+				if (insn->off != 0 && insn->off != 8 && insn->off != 16) {
+					verbose(env, "BPF_MOV uses reserved fields\n");
+					return -EINVAL;
+				}
+			} else {
+				if (insn->off != 0 && insn->off != 8 && insn->off != 16 &&
+				    insn->off != 32) {
+					verbose(env, "BPF_MOV uses reserved fields\n");
+					return -EINVAL;
+				}
 			}
 
 			/* check src operand */
···
 				       !tnum_is_const(src_reg->var_off);
 
 			if (BPF_CLASS(insn->code) == BPF_ALU64) {
-				/* case: R1 = R2
-				 * copy register state to dest reg
-				 */
-				if (need_id)
-					/* Assign src and dst registers the same ID
-					 * that will be used by find_equal_scalars()
-					 * to propagate min/max range.
+				if (insn->off == 0) {
+					/* case: R1 = R2
+					 * copy register state to dest reg
 					 */
-					src_reg->id = ++env->id_gen;
-				copy_register_state(dst_reg, src_reg);
-				dst_reg->live |= REG_LIVE_WRITTEN;
-				dst_reg->subreg_def = DEF_NOT_SUBREG;
+					if (need_id)
+						/* Assign src and dst registers the same ID
+						 * that will be used by find_equal_scalars()
+						 * to propagate min/max range.
+						 */
+						src_reg->id = ++env->id_gen;
+					copy_register_state(dst_reg, src_reg);
+					dst_reg->live |= REG_LIVE_WRITTEN;
+					dst_reg->subreg_def = DEF_NOT_SUBREG;
+				} else {
+					/* case: R1 = (s8, s16 s32)R2 */
+					bool no_sext;
+
+					no_sext = src_reg->umax_value < (1ULL << (insn->off - 1));
+					if (no_sext && need_id)
+						src_reg->id = ++env->id_gen;
+					copy_register_state(dst_reg, src_reg);
+					if (!no_sext)
+						dst_reg->id = 0;
+					coerce_reg_to_size_sx(dst_reg, insn->off >> 3);
+					dst_reg->live |= REG_LIVE_WRITTEN;
+					dst_reg->subreg_def = DEF_NOT_SUBREG;
+				}
 			} else {
 				/* R1 = (u32) R2 */
 				if (is_pointer_value(env, insn->src_reg)) {
···
 						insn->src_reg);
 					return -EACCES;
 				} else if (src_reg->type == SCALAR_VALUE) {
-					bool is_src_reg_u32 = src_reg->umax_value <= U32_MAX;
+					if (insn->off == 0) {
+						bool is_src_reg_u32 = src_reg->umax_value <= U32_MAX;
 
-					if (is_src_reg_u32 && need_id)
-						src_reg->id = ++env->id_gen;
-					copy_register_state(dst_reg, src_reg);
-					/* Make sure ID is cleared if src_reg is not in u32 range otherwise
-					 * dst_reg min/max could be incorrectly
-					 * propagated into src_reg by find_equal_scalars()
-					 */
-					if (!is_src_reg_u32)
-						dst_reg->id = 0;
-					dst_reg->live |= REG_LIVE_WRITTEN;
-					dst_reg->subreg_def = env->insn_idx + 1;
+						if (is_src_reg_u32 && need_id)
+							src_reg->id = ++env->id_gen;
+						copy_register_state(dst_reg, src_reg);
+						/* Make sure ID is cleared if src_reg is not in u32
+						 * range otherwise dst_reg min/max could be incorrectly
+						 * propagated into src_reg by find_equal_scalars()
+						 */
+						if (!is_src_reg_u32)
+							dst_reg->id = 0;
+						dst_reg->live |= REG_LIVE_WRITTEN;
+						dst_reg->subreg_def = env->insn_idx + 1;
+					} else {
+						/* case: W1 = (s8, s16)W2 */
+						bool no_sext = src_reg->umax_value < (1ULL << (insn->off - 1));
+
+						if (no_sext && need_id)
+							src_reg->id = ++env->id_gen;
+						copy_register_state(dst_reg, src_reg);
+						if (!no_sext)
+							dst_reg->id = 0;
+						dst_reg->live |= REG_LIVE_WRITTEN;
+						dst_reg->subreg_def = env->insn_idx + 1;
+						coerce_subreg_to_size_sx(dst_reg, insn->off >> 3);
+					}
 				} else {
 					mark_reg_unknown(env, regs,
 							 insn->dst_reg);
···
 	} else {	/* all other ALU ops: and, sub, xor, add, ... */
 
 		if (BPF_SRC(insn->code) == BPF_X) {
-			if (insn->imm != 0 || insn->off != 0) {
+			if (insn->imm != 0 || insn->off > 1 ||
+			    (insn->off == 1 && opcode != BPF_MOD && opcode != BPF_DIV)) {
 				verbose(env, "BPF_ALU uses reserved fields\n");
 				return -EINVAL;
 			}
···
 			if (err)
 				return err;
 		} else {
-			if (insn->src_reg != BPF_REG_0 || insn->off != 0) {
+			if (insn->src_reg != BPF_REG_0 || insn->off > 1 ||
+			    (insn->off == 1 && opcode != BPF_MOD && opcode != BPF_DIV)) {
 				verbose(env, "BPF_ALU uses reserved fields\n");
 				return -EINVAL;
 			}
···
 static int visit_insn(int t, struct bpf_verifier_env *env)
 {
 	struct bpf_insn *insns = env->prog->insnsi, *insn = &insns[t];
-	int ret;
+	int ret, off;
 
 	if (bpf_pseudo_func(insn))
 		return visit_func_call_insn(t, insns, env, true);
···
 		if (BPF_SRC(insn->code) != BPF_K)
 			return -EINVAL;
 
+		if (BPF_CLASS(insn->code) == BPF_JMP)
+			off = insn->off;
+		else
+			off = insn->imm;
+
 		/* unconditional jump with single edge */
-		ret = push_insn(t, t + insn->off + 1, FALLTHROUGH, env,
+		ret = push_insn(t, t + off + 1, FALLTHROUGH, env,
 				true);
 		if (ret)
 			return ret;
 
-		mark_prune_point(env, t + insn->off + 1);
-		mark_jmp_point(env, t + insn->off + 1);
+		mark_prune_point(env, t + off + 1);
+		mark_jmp_point(env, t + off + 1);
 
 		return ret;
 
···
 			 * Have to support a use case when one path through
 			 * the program yields TRUSTED pointer while another
 			 * is UNTRUSTED. Fallback to UNTRUSTED to generate
-			 * BPF_PROBE_MEM.
+			 * BPF_PROBE_MEM/BPF_PROBE_MEMSX.
 			 */
 			*prev_type = PTR_TO_BTF_ID | PTR_UNTRUSTED;
 		} else {
···
 			 */
 			err = check_mem_access(env, env->insn_idx, insn->src_reg,
 					       insn->off, BPF_SIZE(insn->code),
-					       BPF_READ, insn->dst_reg, false);
+					       BPF_READ, insn->dst_reg, false,
+					       BPF_MODE(insn->code) == BPF_MEMSX);
 			if (err)
 				return err;
 
···
 			/* check that memory (dst_reg + off) is writeable */
 			err = check_mem_access(env, env->insn_idx, insn->dst_reg,
 					       insn->off, BPF_SIZE(insn->code),
-					       BPF_WRITE, insn->src_reg, false);
+					       BPF_WRITE, insn->src_reg, false, false);
 			if (err)
 				return err;
 
···
 			/* check that memory (dst_reg + off) is writeable */
 			err = check_mem_access(env, env->insn_idx, insn->dst_reg,
 					       insn->off, BPF_SIZE(insn->code),
-					       BPF_WRITE, -1, false);
+					       BPF_WRITE, -1, false, false);
 			if (err)
 				return err;
 
···
 				mark_reg_scratched(env, BPF_REG_0);
 			} else if (opcode == BPF_JA) {
 				if (BPF_SRC(insn->code) != BPF_K ||
-				    insn->imm != 0 ||
 				    insn->src_reg != BPF_REG_0 ||
 				    insn->dst_reg != BPF_REG_0 ||
-				    class == BPF_JMP32) {
+				    (class == BPF_JMP && insn->imm != 0) ||
+				    (class == BPF_JMP32 && insn->off != 0)) {
 					verbose(env, "BPF_JA uses reserved fields\n");
 					return -EINVAL;
 				}
 
-				env->insn_idx += insn->off + 1;
+				if (class == BPF_JMP)
+					env->insn_idx += insn->off + 1;
+				else
+					env->insn_idx += insn->imm + 1;
 				continue;
 
 			} else if (opcode == BPF_EXIT) {
···
 
 	for (i = 0; i < insn_cnt; i++, insn++) {
 		if (BPF_CLASS(insn->code) == BPF_LDX &&
-		    (BPF_MODE(insn->code) != BPF_MEM || insn->imm != 0)) {
+		    ((BPF_MODE(insn->code) != BPF_MEM && BPF_MODE(insn->code) != BPF_MEMSX) ||
+		    insn->imm != 0)) {
 			verbose(env, "BPF_LDX uses reserved fields\n");
 			return -EINVAL;
 		}
···
 {
 	u8 op;
 
+	op = BPF_OP(code);
 	if (BPF_CLASS(code) == BPF_JMP32)
-		return true;
+		return op != BPF_JA;
 
 	if (BPF_CLASS(code) != BPF_JMP)
 		return false;
 
-	op = BPF_OP(code);
 	return op != BPF_JA && op != BPF_EXIT && op != BPF_CALL;
 }
 
···
 
 	for (i = 0; i < insn_cnt; i++, insn++) {
 		bpf_convert_ctx_access_t convert_ctx_access;
+		u8 mode;
 
 		if (insn->code == (BPF_LDX | BPF_MEM | BPF_B) ||
 		    insn->code == (BPF_LDX | BPF_MEM | BPF_H) ||
 		    insn->code == (BPF_LDX | BPF_MEM | BPF_W) ||
-		    insn->code == (BPF_LDX | BPF_MEM | BPF_DW)) {
+		    insn->code == (BPF_LDX | BPF_MEM | BPF_DW) ||
+		    insn->code == (BPF_LDX | BPF_MEMSX | BPF_B) ||
+		    insn->code == (BPF_LDX | BPF_MEMSX | BPF_H) ||
+		    insn->code == (BPF_LDX | BPF_MEMSX | BPF_W)) {
 			type = BPF_READ;
 		} else if (insn->code == (BPF_STX | BPF_MEM | BPF_B) ||
 			   insn->code == (BPF_STX | BPF_MEM | BPF_H) ||
···
 		 */
 		case PTR_TO_BTF_ID | MEM_ALLOC | PTR_UNTRUSTED:
 			if (type == BPF_READ) {
-				insn->code = BPF_LDX | BPF_PROBE_MEM |
-					BPF_SIZE((insn)->code);
+				if (BPF_MODE(insn->code) == BPF_MEM)
+					insn->code = BPF_LDX | BPF_PROBE_MEM |
+						     BPF_SIZE((insn)->code);
+				else
+					insn->code = BPF_LDX | BPF_PROBE_MEMSX |
+						     BPF_SIZE((insn)->code);
 				env->prog->aux->num_exentries++;
 			}
 			continue;
···
 
 		ctx_field_size = env->insn_aux_data[i + delta].ctx_field_size;
 		size = BPF_LDST_BYTES(insn);
+		mode = BPF_MODE(insn->code);
 
 		/* If the read access is a narrower load of the field,
 		 * convert to a 4/8-byte load, to minimum program type specific
···
 								(1ULL << size * 8) - 1);
 			}
 		}
+		if (mode == BPF_MEMSX)
+			insn_buf[cnt++] = BPF_RAW_INSN(BPF_ALU64 | BPF_MOV | BPF_X,
+						       insn->dst_reg, insn->dst_reg,
+						       size * 8, 0);
 
 		new_prog = bpf_patch_insn_data(env, i + delta, insn_buf, cnt);
 		if (!new_prog)
···
 		insn = func[i]->insnsi;
 		for (j = 0; j < func[i]->len; j++, insn++) {
 			if (BPF_CLASS(insn->code) == BPF_LDX &&
-			    BPF_MODE(insn->code) == BPF_PROBE_MEM)
+			    (BPF_MODE(insn->code) == BPF_PROBE_MEM ||
+			     BPF_MODE(insn->code) == BPF_PROBE_MEMSX))
 				num_exentries++;
 		}
 		func[i]->aux->num_exentries = num_exentries;

kernel/trace/bpf_trace.c

···
 	.arg3_type	= ARG_ANYTHING,
 };
 
-static __always_inline int
-bpf_probe_read_kernel_common(void *dst, u32 size, const void *unsafe_ptr)
-{
-	int ret;
-
-	ret = copy_from_kernel_nofault(dst, unsafe_ptr, size);
-	if (unlikely(ret < 0))
-		memset(dst, 0, size);
-	return ret;
-}
-
 BPF_CALL_3(bpf_probe_read_kernel, void *, dst, u32, size,
 	   const void *, unsafe_ptr)
 {

kernel/trace/trace_syscalls.c

···
 			       struct syscall_trace_enter *rec)
 {
 	struct syscall_tp_t {
-		unsigned long long regs;
+		struct trace_entry ent;
 		unsigned long syscall_nr;
 		unsigned long args[SYSCALL_DEFINE_MAXARGS];
-	} param;
+	} __aligned(8) param;
 	int i;
 
+	BUILD_BUG_ON(sizeof(param.ent) < sizeof(void *));
+
+	/* bpf prog requires 'regs' to be the first member in the ctx (a.k.a. &param) */
 	*(struct pt_regs **)&param = regs;
 	param.syscall_nr = rec->nr;
 	for (i = 0; i < sys_data->nb_args; i++)
···
 			      struct syscall_trace_exit *rec)
 {
 	struct syscall_tp_t {
-		unsigned long long regs;
+		struct trace_entry ent;
 		unsigned long syscall_nr;
 		unsigned long ret;
-	} param;
+	} __aligned(8) param;
 
+	/* bpf prog requires 'regs' to be the first member in the ctx (a.k.a. &param) */
 	*(struct pt_regs **)&param = regs;
 	param.syscall_nr = rec->nr;
 	param.ret = rec->ret;

net/bpf/test_run.c

···
 #include <linux/smp.h>
 #include <linux/sock_diag.h>
 #include <linux/netfilter.h>
+#include <net/netdev_rx_queue.h>
 #include <net/xdp.h>
 #include <net/netfilter/nf_bpf_link.h>
 

net/core/dev.c

···
 #include <trace/events/net.h>
 #include <trace/events/skb.h>
 #include <trace/events/qdisc.h>
+#include <trace/events/xdp.h>
 #include <linux/inetdevice.h>
 #include <linux/cpu_rmap.h>
 #include <linux/static_key.h>
···
 #include <linux/pm_runtime.h>
 #include <linux/prandom.h>
 #include <linux/once_lite.h>
+#include <net/netdev_rx_queue.h>
 
 #include "dev.h"
 #include "net-sysfs.h"
···
 {
 	struct net *net = current->nsproxy->net_ns;
 	struct bpf_link_primer link_primer;
+	struct netlink_ext_ack extack = {};
 	struct bpf_xdp_link *link;
 	struct net_device *dev;
 	int err, fd;
···
 		goto unlock;
 	}
 
-	err = dev_xdp_attach_link(dev, NULL, link);
+	err = dev_xdp_attach_link(dev, &extack, link);
 	rtnl_unlock();
 
 	if (err) {
 		link->dev = NULL;
 		bpf_link_cleanup(&link_primer);
+		trace_bpf_xdp_link_attach_failed(extack._msg);
 		goto out_put_dev;
 	}
 

net/core/filter.c

···
 		return -EOPNOTSUPP;
 	if (unlikely(dev_net(skb->dev) != sock_net(sk)))
 		return -ENETUNREACH;
-	if (unlikely(sk_fullsock(sk) && sk->sk_reuseport))
-		return -ESOCKTNOSUPPORT;
+	if (sk_unhashed(sk))
+		return -EOPNOTSUPP;
 	if (sk_is_refcounted(sk) &&
 	    unlikely(!refcount_inc_not_zero(&sk->sk_refcnt)))
 		return -ENOENT;

net/core/net-sysfs.c

···
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/cpu.h>
+#include <net/netdev_rx_queue.h>
 
 #include "dev.h"
 #include "net-sysfs.h"

net/ipv4/inet_hashtables.c

···
 #include <net/tcp.h>
 #include <net/sock_reuseport.h>
 
-static u32 inet_ehashfn(const struct net *net, const __be32 laddr,
-			const __u16 lport, const __be32 faddr,
-			const __be16 fport)
+u32 inet_ehashfn(const struct net *net, const __be32 laddr,
+		 const __u16 lport, const __be32 faddr,
+		 const __be16 fport)
 {
 	static u32 inet_ehash_secret __read_mostly;
 
···
 	return __inet_ehashfn(laddr, lport, faddr, fport,
 			      inet_ehash_secret + net_hash_mix(net));
 }
+EXPORT_SYMBOL_GPL(inet_ehashfn);
 
 /* This function handles inet_sock, but also timewait and request sockets
  * for IPv4/IPv6.
···
 	return score;
 }
 
-static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
-					    struct sk_buff *skb, int doff,
-					    __be32 saddr, __be16 sport,
-					    __be32 daddr, unsigned short hnum)
+/**
+ * inet_lookup_reuseport() - execute reuseport logic on AF_INET socket if necessary.
+ * @net: network namespace.
+ * @sk: AF_INET socket, must be in TCP_LISTEN state for TCP or TCP_CLOSE for UDP.
+ * @skb: context for a potential SK_REUSEPORT program.
+ * @doff: header offset.
+ * @saddr: source address.
+ * @sport: source port.
+ * @daddr: destination address.
+ * @hnum: destination port in host byte order.
+ * @ehashfn: hash function used to generate the fallback hash.
+ *
+ * Return: NULL if sk doesn't have SO_REUSEPORT set, otherwise a pointer to
+ *         the selected sock or an error.
+ */
+struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
+				   struct sk_buff *skb, int doff,
+				   __be32 saddr, __be16 sport,
+				   __be32 daddr, unsigned short hnum,
+				   inet_ehashfn_t *ehashfn)
 {
 	struct sock *reuse_sk = NULL;
 	u32 phash;
 
 	if (sk->sk_reuseport) {
-		phash = inet_ehashfn(net, daddr, hnum, saddr, sport);
+		phash = INDIRECT_CALL_2(ehashfn, udp_ehashfn, inet_ehashfn,
+					net, daddr, hnum, saddr, sport);
 		reuse_sk = reuseport_select_sock(sk, phash, skb, doff);
 	}
 	return reuse_sk;
 }
+EXPORT_SYMBOL_GPL(inet_lookup_reuseport);
 
 /*
  * Here are some nice properties to exploit here. The BSD API
···
 	sk_nulls_for_each_rcu(sk, node, &ilb2->nulls_head) {
 		score = compute_score(sk, net, hnum, daddr, dif, sdif);
 		if (score > hiscore) {
-			result = lookup_reuseport(net, sk, skb, doff,
-						  saddr, sport, daddr, hnum);
+			result = inet_lookup_reuseport(net, sk, skb, doff,
+						       saddr, sport, daddr, hnum, inet_ehashfn);
 			if (result)
 				return result;
 
···
 	return result;
 }
 
-static inline struct sock *inet_lookup_run_bpf(struct net *net,
-					       struct inet_hashinfo *hashinfo,
-					       struct sk_buff *skb, int doff,
-					       __be32 saddr, __be16 sport,
-					       __be32 daddr, u16 hnum, const int dif)
+struct sock *inet_lookup_run_sk_lookup(struct net *net,
+				       int protocol,
+				       struct sk_buff *skb, int doff,
+				       __be32 saddr, __be16 sport,
+				       __be32 daddr, u16 hnum, const int dif,
+				       inet_ehashfn_t *ehashfn)
 {
 	struct sock *sk, *reuse_sk;
 	bool no_reuseport;
 
-	if (hashinfo != net->ipv4.tcp_death_row.hashinfo)
-		return NULL; /* only TCP is supported */
-
-	no_reuseport = bpf_sk_lookup_run_v4(net, IPPROTO_TCP, saddr, sport,
+	no_reuseport = bpf_sk_lookup_run_v4(net, protocol, saddr, sport,
 					    daddr, hnum, dif, &sk);
 	if (no_reuseport || IS_ERR_OR_NULL(sk))
 		return sk;
 
-	reuse_sk = lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
+	reuse_sk = inet_lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum,
+					 ehashfn);
 	if (reuse_sk)
 		sk = reuse_sk;
 	return sk;
···
 	unsigned int hash2;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
-		result = inet_lookup_run_bpf(net, hashinfo, skb, doff,
-					     saddr, sport, daddr, hnum, dif);
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
+	    hashinfo == net->ipv4.tcp_death_row.hashinfo) {
+		result = inet_lookup_run_sk_lookup(net, IPPROTO_TCP, skb, doff,
+						   saddr, sport, daddr, hnum, dif,
+						   inet_ehashfn);
 		if (result)
 			goto done;
 	}

net/ipv4/netfilter/nf_defrag_ipv4.c

···
 #include <linux/ip.h>
 #include <linux/netfilter.h>
 #include <linux/module.h>
+#include <linux/rcupdate.h>
 #include <linux/skbuff.h>
 #include <net/netns/generic.h>
 #include <net/route.h>
···
 	}
 }
 
+static const struct nf_defrag_hook defrag_hook = {
+	.owner = THIS_MODULE,
+	.enable = nf_defrag_ipv4_enable,
+	.disable = nf_defrag_ipv4_disable,
+};
+
 static struct pernet_operations defrag4_net_ops = {
 	.exit = defrag4_net_exit,
 };
 
 static int __init nf_defrag_init(void)
 {
-	return register_pernet_subsys(&defrag4_net_ops);
+	int err;
+
+	err = register_pernet_subsys(&defrag4_net_ops);
+	if (err)
+		return err;
+
+	rcu_assign_pointer(nf_defrag_v4_hook, &defrag_hook);
+	return err;
 }
 
 static void __exit nf_defrag_fini(void)
 {
+	rcu_assign_pointer(nf_defrag_v4_hook, NULL);
 	unregister_pernet_subsys(&defrag4_net_ops);
 }
 

net/ipv4/udp.c

···
 	return score;
 }
 
-static u32 udp_ehashfn(const struct net *net, const __be32 laddr,
-		       const __u16 lport, const __be32 faddr,
-		       const __be16 fport)
+INDIRECT_CALLABLE_SCOPE
+u32 udp_ehashfn(const struct net *net, const __be32 laddr, const __u16 lport,
+		const __be32 faddr, const __be16 fport)
 {
 	static u32 udp_ehash_secret __read_mostly;
 
···
 
 	return __inet_ehashfn(laddr, lport, faddr, fport,
 			      udp_ehash_secret + net_hash_mix(net));
-}
-
-static struct sock *lookup_reuseport(struct net *net, struct sock *sk,
-				     struct sk_buff *skb,
-				     __be32 saddr, __be16 sport,
-				     __be32 daddr, unsigned short hnum)
-{
-	struct sock *reuse_sk = NULL;
-	u32 hash;
-
-	if (sk->sk_reuseport && sk->sk_state != TCP_ESTABLISHED) {
-		hash = udp_ehashfn(net, daddr, hnum, saddr, sport);
-		reuse_sk = reuseport_select_sock(sk, hash, skb,
-						 sizeof(struct udphdr));
-	}
-	return reuse_sk;
 }
 
 /* called with rcu_read_lock() */
···
 		score = compute_score(sk, net, saddr, sport,
 				      daddr, hnum, dif, sdif);
 		if (score > badness) {
-			result = lookup_reuseport(net, sk, skb,
-						  saddr, sport, daddr, hnum);
+			badness = score;
+
+			if (sk->sk_state == TCP_ESTABLISHED) {
+				result = sk;
+				continue;
+			}
+
+			result = inet_lookup_reuseport(net, sk, skb, sizeof(struct udphdr),
+						       saddr, sport, daddr, hnum, udp_ehashfn);
+			if (!result) {
+				result = sk;
+				continue;
+			}
+
 			/* Fall back to scoring if group has connections */
-			if (result && !reuseport_has_conns(sk))
+			if (!reuseport_has_conns(sk))
 				return result;
 
-			result = result ? : sk;
-			badness = score;
+			/* Reuseport logic returned an error, keep original score. */
+			if (IS_ERR(result))
+				continue;
+
+			badness = compute_score(result, net, saddr, sport,
+						daddr, hnum, dif, sdif);
+
 		}
 	}
 	return result;
-}
-
-static struct sock *udp4_lookup_run_bpf(struct net *net,
-					struct udp_table *udptable,
-					struct sk_buff *skb,
-					__be32 saddr, __be16 sport,
-					__be32 daddr, u16 hnum, const int dif)
-{
-	struct sock *sk, *reuse_sk;
-	bool no_reuseport;
-
-	if (udptable != net->ipv4.udp_table)
-		return NULL; /* only UDP is supported */
-
-	no_reuseport = bpf_sk_lookup_run_v4(net, IPPROTO_UDP, saddr, sport,
-					    daddr, hnum, dif, &sk);
-	if (no_reuseport || IS_ERR_OR_NULL(sk))
-		return sk;
-
-	reuse_sk = lookup_reuseport(net, sk, skb, saddr, sport, daddr, hnum);
-	if (reuse_sk)
-		sk = reuse_sk;
-	return sk;
 }
 
 /* UDP is nearly always wildcards out the wazoo, it makes no sense to try
···
 		goto done;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
-		sk = udp4_lookup_run_bpf(net, udptable, skb,
-					 saddr, sport, daddr, hnum, dif);
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
+	    udptable == net->ipv4.udp_table) {
+		sk = inet_lookup_run_sk_lookup(net, IPPROTO_UDP, skb, sizeof(struct udphdr),
+					       saddr, sport, daddr, hnum, dif,
+					       udp_ehashfn);
 		if (sk) {
 			result = sk;
 			goto done;
···
 	if (udp4_csum_init(skb, uh, proto))
 		goto csum_error;
 
-	sk = skb_steal_sock(skb, &refcounted);
+	sk = inet_steal_sock(net, skb, sizeof(struct udphdr), saddr, uh->source, daddr, uh->dest,
+			     &refcounted, udp_ehashfn);
+	if (IS_ERR(sk))
+		goto no_sk;
+
 	if (sk) {
 		struct dst_entry *dst = skb_dst(skb);
 		int ret;
···
 	sk = __udp4_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
 	if (sk)
 		return udp_unicast_rcv_skb(sk, skb, uh);
-
+no_sk:
 	if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
 		goto drop;
 	nf_reset_ct(skb);

net/ipv6/inet6_hashtables.c

···
 	return __inet6_ehashfn(lhash, lport, fhash, fport,
 			       inet6_ehash_secret + net_hash_mix(net));
 }
+EXPORT_SYMBOL_GPL(inet6_ehashfn);
 
 /*
  * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
···
 	return score;
 }
 
-static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
-					    struct sk_buff *skb, int doff,
-					    const struct in6_addr *saddr,
-					    __be16 sport,
-					    const struct in6_addr *daddr,
-					    unsigned short hnum)
+/**
+ * inet6_lookup_reuseport() - execute reuseport logic on AF_INET6 socket if necessary.
+ * @net: network namespace.
+ * @sk: AF_INET6 socket, must be in TCP_LISTEN state for TCP or TCP_CLOSE for UDP.
+ * @skb: context for a potential SK_REUSEPORT program.
+ * @doff: header offset.
+ * @saddr: source address.
+ * @sport: source port.
+ * @daddr: destination address.
+ * @hnum: destination port in host byte order.
+ * @ehashfn: hash function used to generate the fallback hash.
+ *
+ * Return: NULL if sk doesn't have SO_REUSEPORT set, otherwise a pointer to
+ *         the selected sock or an error.
+ */
+struct sock *inet6_lookup_reuseport(struct net *net, struct sock *sk,
+				    struct sk_buff *skb, int doff,
+				    const struct in6_addr *saddr,
+				    __be16 sport,
+				    const struct in6_addr *daddr,
+				    unsigned short hnum,
+				    inet6_ehashfn_t *ehashfn)
 {
 	struct sock *reuse_sk = NULL;
 	u32 phash;
 
 	if (sk->sk_reuseport) {
-		phash = inet6_ehashfn(net, daddr, hnum, saddr, sport);
+		phash = INDIRECT_CALL_INET(ehashfn, udp6_ehashfn, inet6_ehashfn,
+					   net, daddr, hnum, saddr, sport);
 		reuse_sk = reuseport_select_sock(sk, phash, skb, doff);
 	}
 	return reuse_sk;
 }
+EXPORT_SYMBOL_GPL(inet6_lookup_reuseport);
 
 /* called with rcu_read_lock() */
 static struct sock *inet6_lhash2_lookup(struct net *net,
···
 	sk_nulls_for_each_rcu(sk, node, &ilb2->nulls_head) {
 		score = compute_score(sk, net, hnum, daddr, dif, sdif);
 		if (score > hiscore) {
-			result = lookup_reuseport(net, sk, skb, doff,
-						  saddr, sport, daddr, hnum);
+			result = inet6_lookup_reuseport(net, sk, skb, doff,
+							saddr, sport, daddr, hnum, inet6_ehashfn);
 			if (result)
 				return result;
 
···
 	return result;
 }
 
-static inline struct sock *inet6_lookup_run_bpf(struct net *net,
-						struct inet_hashinfo *hashinfo,
-						struct sk_buff *skb, int doff,
-						const struct in6_addr *saddr,
-						const __be16 sport,
-						const struct in6_addr *daddr,
-						const u16 hnum, const int dif)
+struct sock *inet6_lookup_run_sk_lookup(struct net *net,
+					int protocol,
+					struct sk_buff *skb, int doff,
+					const struct in6_addr *saddr,
+					const __be16 sport,
+					const struct in6_addr *daddr,
+					const u16 hnum, const int dif,
+					inet6_ehashfn_t *ehashfn)
 {
 	struct sock *sk, *reuse_sk;
 	bool no_reuseport;
 
-	if (hashinfo != net->ipv4.tcp_death_row.hashinfo)
-		return NULL; /* only TCP is supported */
-
-	no_reuseport = bpf_sk_lookup_run_v6(net, IPPROTO_TCP, saddr, sport,
+	no_reuseport = bpf_sk_lookup_run_v6(net, protocol, saddr, sport,
 					    daddr, hnum, dif, &sk);
 	if (no_reuseport || IS_ERR_OR_NULL(sk))
 		return sk;
 
-	reuse_sk = lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
+	reuse_sk = inet6_lookup_reuseport(net, sk, skb, doff,
+					  saddr, sport, daddr, hnum, ehashfn);
 	if (reuse_sk)
 		sk = reuse_sk;
 	return sk;
 }
+EXPORT_SYMBOL_GPL(inet6_lookup_run_sk_lookup);
 
 struct sock *inet6_lookup_listener(struct net *net,
 		struct inet_hashinfo *hashinfo,
···
 	unsigned int hash2;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
-		result = inet6_lookup_run_bpf(net, hashinfo, skb, doff,
-					      saddr, sport, daddr, hnum, dif);
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
+	    hashinfo == net->ipv4.tcp_death_row.hashinfo) {
+		result = inet6_lookup_run_sk_lookup(net, IPPROTO_TCP, skb, doff,
+						    saddr, sport, daddr, hnum, dif,
+						    inet6_ehashfn);
 		if (result)
 			goto done;
 	}

net/ipv6/netfilter/nf_defrag_ipv6_hooks.c

···
 #include <linux/module.h>
 #include <linux/skbuff.h>
 #include <linux/icmp.h>
+#include <linux/rcupdate.h>
 #include <linux/sysctl.h>
 #include <net/ipv6_frag.h>
 
···
 	}
 }
 
+static const struct nf_defrag_hook defrag_hook = {
+	.owner = THIS_MODULE,
+	.enable = nf_defrag_ipv6_enable,
+	.disable = nf_defrag_ipv6_disable,
+};
+
 static struct pernet_operations defrag6_net_ops = {
 	.exit = defrag6_net_exit,
 };
···
 		pr_err("nf_defrag_ipv6: can't register pernet ops\n");
 		goto cleanup_frag6;
 	}
+
+	rcu_assign_pointer(nf_defrag_v6_hook, &defrag_hook);
+
 	return ret;
 
 cleanup_frag6:
···
 
 static void __exit nf_defrag_fini(void)
 {
+	rcu_assign_pointer(nf_defrag_v6_hook, NULL);
 	unregister_pernet_subsys(&defrag6_net_ops);
 	nf_ct_frag6_cleanup();
 }

net/ipv6/udp.c

···
 	return 0;
 }
 
-static u32 udp6_ehashfn(const struct net *net,
-			const struct in6_addr *laddr,
-			const u16 lport,
-			const struct in6_addr *faddr,
-			const __be16 fport)
+INDIRECT_CALLABLE_SCOPE
+u32 udp6_ehashfn(const struct net *net,
+		 const struct in6_addr *laddr,
+		 const u16 lport,
+		 const struct in6_addr *faddr,
+		 const __be16 fport)
 {
 	static u32 udp6_ehash_secret __read_mostly;
 	static u32 udp_ipv6_hash_secret __read_mostly;
···
 	return score;
 }
 
-static struct sock *lookup_reuseport(struct net *net, struct sock *sk,
-				     struct sk_buff *skb,
-				     const struct in6_addr *saddr,
-				     __be16 sport,
-				     const struct in6_addr *daddr,
-				     unsigned int hnum)
-{
-	struct sock *reuse_sk = NULL;
-	u32 hash;
-
-	if (sk->sk_reuseport && sk->sk_state != TCP_ESTABLISHED) {
-		hash = udp6_ehashfn(net, daddr, hnum, saddr, sport);
-		reuse_sk = reuseport_select_sock(sk, hash, skb,
-						 sizeof(struct udphdr));
-	}
-	return reuse_sk;
-}
-
 /* called with rcu_read_lock() */
 static struct sock *udp6_lib_lookup2(struct net *net,
 		const struct in6_addr *saddr, __be16 sport,
···
 		score = compute_score(sk, net, saddr, sport,
 				      daddr, hnum, dif, sdif);
 		if (score > badness) {
-			result = lookup_reuseport(net, sk, skb,
-						  saddr, sport, daddr, hnum);
+			badness = score;
+
+			if (sk->sk_state == TCP_ESTABLISHED) {
+				result = sk;
+				continue;
+			}
+
+			result = inet6_lookup_reuseport(net, sk, skb, sizeof(struct udphdr),
+							saddr, sport, daddr, hnum, udp6_ehashfn);
+			if (!result) {
+				result = sk;
+				continue;
+			}
+
 			/* Fall back to scoring if group has connections */
-			if (result && !reuseport_has_conns(sk))
+			if (!reuseport_has_conns(sk))
 				return result;
 
-			result = result ? : sk;
-			badness = score;
+			/* Reuseport logic returned an error, keep original score. */
+			if (IS_ERR(result))
+				continue;
+
+			badness = compute_score(sk, net, saddr, sport,
+						daddr, hnum, dif, sdif);
 		}
 	}
 	return result;
-}
-
-static inline struct sock *udp6_lookup_run_bpf(struct net *net,
-					       struct udp_table *udptable,
-					       struct sk_buff *skb,
-					       const struct in6_addr *saddr,
-					       __be16 sport,
-					       const struct in6_addr *daddr,
-					       u16 hnum, const int dif)
-{
-	struct sock *sk, *reuse_sk;
-	bool no_reuseport;
-
-	if (udptable != net->ipv4.udp_table)
-		return NULL; /* only UDP is supported */
-
-	no_reuseport = bpf_sk_lookup_run_v6(net, IPPROTO_UDP, saddr, sport,
-					    daddr, hnum, dif, &sk);
-	if (no_reuseport || IS_ERR_OR_NULL(sk))
-		return sk;
-
-	reuse_sk = lookup_reuseport(net, sk, skb, saddr, sport, daddr, hnum);
-	if (reuse_sk)
-		sk = reuse_sk;
-	return sk;
 }
 
 /* rcu_read_lock() must be held */
···
 		goto done;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
-		sk = udp6_lookup_run_bpf(net, udptable, skb,
-					 saddr, sport, daddr, hnum, dif);
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
+	    udptable == net->ipv4.udp_table) {
+		sk = inet6_lookup_run_sk_lookup(net, IPPROTO_UDP, skb, sizeof(struct udphdr),
+						saddr, sport, daddr, hnum, dif,
+						udp6_ehashfn);
 		if (sk) {
 			result = sk;
 			goto done;
···
 		goto csum_error;
 
 	/* Check if the socket is already available, e.g. due to early demux */
-	sk = skb_steal_sock(skb, &refcounted);
+	sk = inet6_steal_sock(net, skb, sizeof(struct udphdr), saddr, uh->source, daddr, uh->dest,
+			      &refcounted, udp6_ehashfn);
+	if (IS_ERR(sk))
+		goto no_sk;
+
 	if (sk) {
 		struct dst_entry *dst = skb_dst(skb);
 		int ret;
···
 			goto report_csum_error;
 		return udp6_unicast_rcv_skb(sk, skb, uh);
 	}
-
+no_sk:
 	reason = SKB_DROP_REASON_NO_SOCKET;
 
 	if (!uh->check)

net/netfilter/core.c

···
 const struct nf_ct_hook __rcu *nf_ct_hook __read_mostly;
 EXPORT_SYMBOL_GPL(nf_ct_hook);
 
+const struct nf_defrag_hook __rcu *nf_defrag_v4_hook __read_mostly;
+EXPORT_SYMBOL_GPL(nf_defrag_v4_hook);
+
+const struct nf_defrag_hook __rcu *nf_defrag_v6_hook __read_mostly;
+EXPORT_SYMBOL_GPL(nf_defrag_v6_hook);
+
 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
 u8 nf_ctnetlink_has_listener;
 EXPORT_SYMBOL_GPL(nf_ctnetlink_has_listener);

net/netfilter/nf_bpf_link.c

···
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/bpf.h>
 #include <linux/filter.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
 #include <linux/netfilter.h>
 
 #include <net/netfilter/nf_bpf_link.h>
···
 	struct nf_hook_ops hook_ops;
 	struct net *net;
 	u32 dead;
+	const struct nf_defrag_hook *defrag_hook;
 };
+
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4) || IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
+static const struct nf_defrag_hook *
+get_proto_defrag_hook(struct bpf_nf_link *link,
+		      const struct nf_defrag_hook __rcu *global_hook,
+		      const char *mod)
+{
+	const struct nf_defrag_hook *hook;
+	int err;
+
+	/* RCU protects us from races against module unloading */
+	rcu_read_lock();
+	hook = rcu_dereference(global_hook);
+	if (!hook) {
+		rcu_read_unlock();
+		err = request_module(mod);
+		if (err)
+			return ERR_PTR(err < 0 ? err : -EINVAL);
+
+		rcu_read_lock();
+		hook = rcu_dereference(global_hook);
+	}
+
+	if (hook && try_module_get(hook->owner)) {
+		/* Once we have a refcnt on the module, we no longer need RCU */
+		hook = rcu_pointer_handoff(hook);
+	} else {
+		WARN_ONCE(!hook, "%s has bad registration", mod);
+		hook = ERR_PTR(-ENOENT);
+	}
+	rcu_read_unlock();
+
+	if (!IS_ERR(hook)) {
+		err = hook->enable(link->net);
+		if (err) {
+			module_put(hook->owner);
+			hook = ERR_PTR(err);
+		}
+	}
+
+	return hook;
+}
+#endif
+
+static int bpf_nf_enable_defrag(struct bpf_nf_link *link)
+{
+	const struct nf_defrag_hook __maybe_unused *hook;
+
+	switch (link->hook_ops.pf) {
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
+	case NFPROTO_IPV4:
+		hook = get_proto_defrag_hook(link, nf_defrag_v4_hook, "nf_defrag_ipv4");
+		if (IS_ERR(hook))
+			return PTR_ERR(hook);
+
+		link->defrag_hook = hook;
+		return 0;
+#endif
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
+	case NFPROTO_IPV6:
+		hook = get_proto_defrag_hook(link, nf_defrag_v6_hook, "nf_defrag_ipv6");
+		if (IS_ERR(hook))
+			return PTR_ERR(hook);
+
+		link->defrag_hook = hook;
+		return 0;
+#endif
+	default:
+		return -EAFNOSUPPORT;
+	}
+}
+
+static void bpf_nf_disable_defrag(struct bpf_nf_link *link)
+{
+	const struct nf_defrag_hook *hook = link->defrag_hook;
+
+	if (!hook)
+		return;
+	hook->disable(link->net);
+	module_put(hook->owner);
+}
 
 static void bpf_nf_link_release(struct bpf_link *link)
 {
···
 	if (nf_link->dead)
 		return;
 
-	/* prevent hook-not-found warning splat from netfilter core when
-	 * .detach was already called
-	 */
-	if (!cmpxchg(&nf_link->dead, 0, 1))
+	/* do not double release in case .detach was already called */
+	if (!cmpxchg(&nf_link->dead, 0, 1)) {
 		nf_unregister_net_hook(nf_link->net, &nf_link->hook_ops);
+		bpf_nf_disable_defrag(nf_link);
+	}
 }
 
 static void bpf_nf_link_dealloc(struct bpf_link *link)
···
 
 static int bpf_nf_check_pf_and_hooks(const union bpf_attr *attr)
 {
+	int prio;
+
 	switch (attr->link_create.netfilter.pf) {
 	case NFPROTO_IPV4:
 	case NFPROTO_IPV6:
···
 		return -EAFNOSUPPORT;
 	}
 
-	if (attr->link_create.netfilter.flags)
+	if (attr->link_create.netfilter.flags & ~BPF_F_NETFILTER_IP_DEFRAG)
 		return -EOPNOTSUPP;
 
-	/* make sure conntrack confirm is always last.
-	 *
-	 * In the future, if userspace can e.g. request defrag, then
-	 * "defrag_requested && prio before NF_IP_PRI_CONNTRACK_DEFRAG"
-	 * should fail.
-	 */
-	switch (attr->link_create.netfilter.priority) {
-	case NF_IP_PRI_FIRST: return -ERANGE; /* sabotage_in and other warts */
-	case NF_IP_PRI_LAST: return -ERANGE; /* e.g. conntrack confirm */
-	}
+	/* make sure conntrack confirm is always last */
+	prio = attr->link_create.netfilter.priority;
+	if (prio == NF_IP_PRI_FIRST)
+		return -ERANGE;  /* sabotage_in and other warts */
+	else if (prio == NF_IP_PRI_LAST)
+		return -ERANGE;  /* e.g. conntrack confirm */
+	else if ((attr->link_create.netfilter.flags & BPF_F_NETFILTER_IP_DEFRAG) &&
+		 prio <= NF_IP_PRI_CONNTRACK_DEFRAG)
+		return -ERANGE;  /* cannot use defrag if prog runs before nf_defrag */
 
 	return 0;
 }
···
 
 	link->net = net;
 	link->dead = false;
+	link->defrag_hook = NULL;
 
 	err = bpf_link_prime(&link->link, &link_primer);
 	if (err) {
···
 		return err;
 	}
 
+	if (attr->link_create.netfilter.flags & BPF_F_NETFILTER_IP_DEFRAG) {
+		err = bpf_nf_enable_defrag(link);
+		if (err) {
+			bpf_link_cleanup(&link_primer);
+			return err;
+		}
+	}
+
 	err = nf_register_net_hook(net, &link->hook_ops);
 	if (err) {
+		bpf_nf_disable_defrag(link);
 		bpf_link_cleanup(&link_primer);
 		return err;
 	}

net/netfilter/nf_conntrack_bpf.c

···
 #include <linux/types.h>
 #include <linux/btf_ids.h>
 #include <linux/net_namespace.h>
+#include <net/xdp.h>
 #include <net/netfilter/nf_conntrack_bpf.h>
 #include <net/netfilter/nf_conntrack_core.h>
 

net/xdp/xsk.c

···
 #include <linux/vmalloc.h>
 #include <net/xdp_sock_drv.h>
 #include <net/busy_poll.h>
+#include <net/netdev_rx_queue.h>
 #include <net/xdp.h>
 
 #include "xsk_queue.h"

tools/include/uapi/linux/bpf.h

···
 
 /* ld/ldx fields */
 #define BPF_DW		0x18	/* double word (64-bit) */
+#define BPF_MEMSX	0x80	/* load with sign extension */
 #define BPF_ATOMIC	0xc0	/* atomic memory ops - op type in immediate */
 #define BPF_XADD	0xc0	/* exclusive add - legacy name */
 
···
  * BPF_TRACE_KPROBE_MULTI attach type to create return probe.
  */
 #define BPF_F_KPROBE_MULTI_RETURN	(1U << 0)
+
+/* link_create.netfilter.flags used in LINK_CREATE command for
+ * BPF_PROG_TYPE_NETFILTER to enable IP packet defragmentation.
+ */
+#define BPF_F_NETFILTER_IP_DEFRAG (1U << 0)
 
 /* When BPF ldimm64's insn[0].src_reg != 0 then this can have
  * the following extensions:
···
  *
  *		**-EOPNOTSUPP** if the operation is not supported, for example
  *		a call from outside of TC ingress.
- *
- *		**-ESOCKTNOSUPPORT** if the socket type is not supported
- *		(reuseport).
  *
  * long bpf_sk_assign(struct bpf_sk_lookup *ctx, struct bpf_sock *sk, u64 flags)
  *	Description

tools/lib/bpf/Makefile

···
 	@echo '  HINT: use "V=1" to enable verbose build'
 	@echo '  all     - build libraries and pkgconfig'
 	@echo '  clean   - remove all generated files'
-	@echo '  check   - check abi and version info'
+	@echo '  check   - check ABI and version info'
 	@echo ''
 	@echo 'libbpf install targets:'
 	@echo '  HINT: use "prefix"(defaults to "/usr/local") or "DESTDIR" (defaults to "/")'
-	@echo '        to adjust target desitantion, e.g. "make prefix=/usr/local install"'
+	@echo '        to adjust target destination, e.g. "make prefix=/usr/local install"'
 	@echo '  install          - build and install all headers, libraries and pkgconfig'
 	@echo '  install_headers  - install only headers to include/bpf'
 	@echo ''

tools/testing/selftests/bpf/.gitignore

···
 /test_progs
 /test_progs-no_alu32
 /test_progs-bpf_gcc
+/test_progs-cpuv4
 test_verifier_log
 feature
 test_sock
···
 *.lskel.h
 /no_alu32
 /bpf_gcc
+/cpuv4
 /host-tools
 /tools
 /runqslower

tools/testing/selftests/bpf/Makefile

···
 LDFLAGS += $(SAN_LDFLAGS)
 LDLIBS += -lelf -lz -lrt -lpthread
 
-# Silence some warnings when compiled with clang
 ifneq ($(LLVM),)
+# Silence some warnings when compiled with clang
 CFLAGS += -Wno-unused-command-line-argument
+endif
+
+# Check whether bpf cpu=v4 is supported or not by clang
+ifneq ($(shell $(CLANG) --target=bpf -mcpu=help 2>&1 | grep 'v4'),)
+CLANG_CPUV4 := 1
 endif
 
 # Order correspond to 'make run_tests' order
···
 # Also test bpf-gcc, if present
 ifneq ($(BPF_GCC),)
 TEST_GEN_PROGS += test_progs-bpf_gcc
+endif
+
+ifneq ($(CLANG_CPUV4),)
+TEST_GEN_PROGS += test_progs-cpuv4
 endif
 
 TEST_GEN_FILES = test_lwt_ip_encap.bpf.o test_tc_edt.bpf.o
···
 	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
 	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
 endef
+# Similar to CLANG_BPF_BUILD_RULE, but with cpu-v4
+define CLANG_CPUV4_BPF_BUILD_RULE
+	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
+	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v4 -o $2
+endef
 # Build BPF object using GCC
 define GCC_BPF_BUILD_RULE
 	$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
···
 # $eval()) and pass control to DEFINE_TEST_RUNNER_RULES.
 # Parameters:
 # $1 - test runner base binary name (e.g., test_progs)
-# $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
+# $2 - test runner extra "flavor" (e.g., no_alu32, cpuv4, gcc-bpf, etc)
 define DEFINE_TEST_RUNNER
 
 TRUNNER_OUTPUT := $(OUTPUT)$(if $2,/)$2
···
 # Using TRUNNER_XXX variables, provided by callers of DEFINE_TEST_RUNNER and
 # set up by DEFINE_TEST_RUNNER itself, create test runner build rules with:
 # $1 - test runner base binary name (e.g., test_progs)
-# $2 - test runner extra "flavor" (e.g., no_alu32, gcc-bpf, etc)
+# $2 - test runner extra "flavor" (e.g., no_alu32, cpuv4, gcc-bpf, etc)
 define DEFINE_TEST_RUNNER_RULES
 
 ifeq ($($(TRUNNER_OUTPUT)-dir),)
···
 			 network_helpers.c testing_helpers.c		\
 			 btf_helpers.c flow_dissector_load.h		\
 			 cap_helpers.c test_loader.c xsk.c disasm.c	\
-			 json_writer.c unpriv_helpers.c
-
+			 json_writer.c unpriv_helpers.c 		\
+			 ip_check_defrag_frags.h
 TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko	\
 		       $(OUTPUT)/liburandom_read.so			\
 		       $(OUTPUT)/xdp_synproxy				\
···
 TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE
 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
 $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32))
+
+# Define test_progs-cpuv4 test runner.
+ifneq ($(CLANG_CPUV4),)
+TRUNNER_BPF_BUILD_RULE := CLANG_CPUV4_BPF_BUILD_RULE
+TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS)
+$(eval $(call DEFINE_TEST_RUNNER,test_progs,cpuv4))
+endif
 
 # Define test_progs BPF-GCC-flavored test runner.
 ifneq ($(BPF_GCC),)
···
 	prog_tests/tests.h map_tests/tests.h verifier/tests.h		\
 	feature bpftool							\
 	$(addprefix $(OUTPUT)/,*.o *.skel.h *.lskel.h *.subskel.h	\
-			       no_alu32 bpf_gcc bpf_testmod.ko		\
+			       no_alu32 cpuv4 bpf_gcc bpf_testmod.ko	\
 			       liburandom_read.so)
 
 .PHONY: docs docs-clean

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c

···
 	return bpf_testmod_test_struct_arg_result;
 }
 
+noinline int
+bpf_testmod_test_arg_ptr_to_struct(struct bpf_testmod_struct_arg_1 *a) {
+	bpf_testmod_test_struct_arg_result = a->a;
+	return bpf_testmod_test_struct_arg_result;
+}
+
 __bpf_kfunc void
 bpf_testmod_test_mod_kfunc(int i)
 {
···
 		.off = off,
 		.len = len,
 	};
-	struct bpf_testmod_struct_arg_1 struct_arg1 = {10};
+	struct bpf_testmod_struct_arg_1 struct_arg1 = {10}, struct_arg1_2 = {-1};
 	struct bpf_testmod_struct_arg_2 struct_arg2 = {2, 3};
 	struct bpf_testmod_struct_arg_3 *struct_arg3;
 	struct bpf_testmod_struct_arg_4 struct_arg4 = {21, 22};
···
 	(void)bpf_testmod_test_struct_arg_8(16, (void *)17, 18, 19,
 					    (void *)20, struct_arg4, 23);
 
+	(void)bpf_testmod_test_arg_ptr_to_struct(&struct_arg1_2);
 
 	struct_arg3 = kmalloc((sizeof(struct bpf_testmod_struct_arg_3) +
 				sizeof(int)), GFP_KERNEL);

tools/testing/selftests/bpf/generate_udp_fragments.py

···
+#!/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+"""
+This script helps generate fragmented UDP packets.
+
+While it is technically possible to dynamically generate
+fragmented packets in C, it is much harder to read and write
+said code. `scapy` is relatively industry standard and really
+easy to read / write.
+
+So we choose to write this script that generates a valid C
+header. Rerun script and commit generated file after any
+modifications.
+"""
+
+import argparse
+import os
+
+from scapy.all import *
+
+
+# These constants must stay in sync with `ip_check_defrag.c`
+VETH1_ADDR = "172.16.1.200"
+VETH0_ADDR6 = "fc00::100"
+VETH1_ADDR6 = "fc00::200"
+CLIENT_PORT = 48878
+SERVER_PORT = 48879
+MAGIC_MESSAGE = "THIS IS THE ORIGINAL MESSAGE, PLEASE REASSEMBLE ME"
+
+
+def print_header(f):
+    f.write("// SPDX-License-Identifier: GPL-2.0\n")
+    f.write("/* DO NOT EDIT -- this file is generated */\n")
+    f.write("\n")
+    f.write("#ifndef _IP_CHECK_DEFRAG_FRAGS_H\n")
+    f.write("#define _IP_CHECK_DEFRAG_FRAGS_H\n")
+    f.write("\n")
+    f.write("#include <stdint.h>\n")
+    f.write("\n")
+
+
+def print_frags(f, frags, v6):
+    for idx, frag in enumerate(frags):
+        # 10 bytes per line to keep width in check
+        chunks = [frag[i : i + 10] for i in range(0, len(frag), 10)]
+        chunks_fmted = [", ".join([str(hex(b)) for b in chunk]) for chunk in chunks]
+        suffix = "6" if v6 else ""
+
+        f.write(f"static uint8_t frag{suffix}_{idx}[] = {{\n")
+        for chunk in chunks_fmted:
+            f.write(f"\t{chunk},\n")
+        f.write(f"}};\n")
+
+
+def print_trailer(f):
+    f.write("\n")
+    f.write("#endif /* _IP_CHECK_DEFRAG_FRAGS_H */\n")
+
+
+def main(f):
+    # srcip of 0 is filled in by IP_HDRINCL
+    sip = "0.0.0.0"
+    sip6 = VETH0_ADDR6
+    dip = VETH1_ADDR
+    dip6 = VETH1_ADDR6
+    sport = CLIENT_PORT
+    dport = SERVER_PORT
+    payload = MAGIC_MESSAGE.encode()
+
+    # Disable UDPv4 checksums to keep code simpler
+    pkt = IP(src=sip,dst=dip) / UDP(sport=sport,dport=dport,chksum=0) / Raw(load=payload)
+    # UDPv6 requires a checksum
+    # Also pin the ipv6 fragment header ID, otherwise it's a random value
+    pkt6 = IPv6(src=sip6,dst=dip6) / IPv6ExtHdrFragment(id=0xBEEF) / UDP(sport=sport,dport=dport) / Raw(load=payload)
+
+    frags = [f.build() for f in pkt.fragment(24)]
+    frags6 = [f.build() for f in fragment6(pkt6, 72)]
+
+    print_header(f)
+    print_frags(f, frags, False)
+    print_frags(f, frags6, True)
+    print_trailer(f)
+
+
+if __name__ == "__main__":
+    dir = os.path.dirname(os.path.realpath(__file__))
+    header = f"{dir}/ip_check_defrag_frags.h"
+    with open(header, "w") as f:
+        main(f)

tools/testing/selftests/bpf/ip_check_defrag_frags.h

···
+// SPDX-License-Identifier: GPL-2.0
+/* DO NOT EDIT -- this file is generated */
+
+#ifndef _IP_CHECK_DEFRAG_FRAGS_H
+#define _IP_CHECK_DEFRAG_FRAGS_H
+
+#include <stdint.h>
+
+static uint8_t frag_0[] = {
+	0x45, 0x0, 0x0, 0x2c, 0x0, 0x1, 0x20, 0x0, 0x40, 0x11,
+	0xac, 0xe8, 0x0, 0x0, 0x0, 0x0, 0xac, 0x10, 0x1, 0xc8,
+	0xbe, 0xee, 0xbe, 0xef, 0x0, 0x3a, 0x0, 0x0, 0x54, 0x48,
+	0x49, 0x53, 0x20, 0x49, 0x53, 0x20, 0x54, 0x48, 0x45, 0x20,
+	0x4f, 0x52, 0x49, 0x47,
+};
+static uint8_t frag_1[] = {
+	0x45, 0x0, 0x0, 0x2c, 0x0, 0x1, 0x20, 0x3, 0x40, 0x11,
+	0xac, 0xe5, 0x0, 0x0, 0x0, 0x0, 0xac, 0x10, 0x1, 0xc8,
+	0x49, 0x4e, 0x41, 0x4c, 0x20, 0x4d, 0x45, 0x53, 0x53, 0x41,
+	0x47, 0x45, 0x2c, 0x20, 0x50, 0x4c, 0x45, 0x41, 0x53, 0x45,
+	0x20, 0x52, 0x45, 0x41,
+};
+static uint8_t frag_2[] = {
+	0x45, 0x0, 0x0, 0x1e, 0x0, 0x1, 0x0, 0x6, 0x40, 0x11,
+	0xcc, 0xf0, 0x0, 0x0, 0x0, 0x0, 0xac, 0x10, 0x1, 0xc8,
+	0x53, 0x53, 0x45, 0x4d, 0x42, 0x4c, 0x45, 0x20, 0x4d, 0x45,
+};
+static uint8_t frag6_0[] = {
+	0x60, 0x0, 0x0, 0x0, 0x0, 0x20, 0x2c, 0x40, 0xfc, 0x0,
+	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+	0x0, 0x0, 0x1, 0x0, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0,
+	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0x0,
+	0x11, 0x0, 0x0, 0x1, 0x0, 0x0, 0xbe, 0xef, 0xbe, 0xee,
+	0xbe, 0xef, 0x0, 0x3a, 0xd0, 0xf8, 0x54, 0x48, 0x49, 0x53,
+	0x20, 0x49, 0x53, 0x20, 0x54, 0x48, 0x45, 0x20, 0x4f, 0x52,
+	0x49, 0x47,
+};
+static uint8_t frag6_1[] = {
+	0x60, 0x0, 0x0, 0x0, 0x0, 0x20, 0x2c, 0x40, 0xfc, 0x0,
+	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+	0x0, 0x0, 0x1, 0x0, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0,
+	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0x0,
+	0x11, 0x0, 0x0, 0x19, 0x0, 0x0, 0xbe, 0xef, 0x49, 0x4e,
+	0x41, 0x4c, 0x20, 0x4d, 0x45, 0x53, 0x53, 0x41, 0x47, 0x45,
+	0x2c, 0x20, 0x50, 0x4c, 0x45, 0x41, 0x53, 0x45, 0x20, 0x52,
+	0x45, 0x41,
+};
+static uint8_t frag6_2[] = {
+	0x60, 0x0, 0x0, 0x0, 0x0, 0x12, 0x2c, 0x40, 0xfc, 0x0,
+	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+	0x0, 0x0, 0x1, 0x0, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0,
+	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2, 0x0,
+	0x11, 0x0, 0x0, 0x30, 0x0, 0x0, 0xbe, 0xef, 0x53, 0x53,
+	0x45, 0x4d, 0x42, 0x4c, 0x45, 0x20, 0x4d, 0x45,
+};
+
+#endif /* _IP_CHECK_DEFRAG_FRAGS_H */

tools/testing/selftests/bpf/network_helpers.c

···
 		opts = &default_opts;
 
 	optlen = sizeof(type);
-	if (getsockopt(server_fd, SOL_SOCKET, SO_TYPE, &type, &optlen)) {
-		log_err("getsockopt(SOL_TYPE)");
-		return -1;
+
+	if (opts->type) {
+		type = opts->type;
+	} else {
+		if (getsockopt(server_fd, SOL_SOCKET, SO_TYPE, &type, &optlen)) {
+			log_err("getsockopt(SOL_TYPE)");
+			return -1;
+		}
 	}
 
-	if (getsockopt(server_fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &optlen)) {
-		log_err("getsockopt(SOL_PROTOCOL)");
-		return -1;
+	if (opts->proto) {
+		protocol = opts->proto;
+	} else {
+		if (getsockopt(server_fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &optlen)) {
+			log_err("getsockopt(SOL_PROTOCOL)");
+			return -1;
+		}
 	}
 
 	addrlen = sizeof(addr);
···
 		       strlen(opts->cc) + 1))
 		goto error_close;
 
-	if (connect_fd_to_addr(fd, &addr, addrlen, opts->must_fail))
-		goto error_close;
+	if (!opts->noconnect)
+		if (connect_fd_to_addr(fd, &addr, addrlen, opts->must_fail))
+			goto error_close;
 
 	return fd;
 
···
 
 void close_netns(struct nstoken *token)
 {
+	if (!token)
+		return;
+
 	ASSERT_OK(setns(token->orig_netns_fd, CLONE_NEWNET), "setns");
 	close(token->orig_netns_fd);
 	free(token);

tools/testing/selftests/bpf/network_helpers.h

···
 	const char *cc;
 	int timeout_ms;
 	bool must_fail;
+	bool noconnect;
+	int type;
+	int proto;
 };
 
 /* ipv4 test vector */

tools/testing/selftests/bpf/prog_tests/assign_reuse.c

···
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2023 Isovalent */
+#include <uapi/linux/if_link.h>
+#include <test_progs.h>
+
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+
+#include "network_helpers.h"
+#include "test_assign_reuse.skel.h"
+
+#define NS_TEST "assign_reuse"
+#define LOOPBACK 1
+#define PORT 4443
+
+static int attach_reuseport(int sock_fd, int prog_fd)
+{
+	return setsockopt(sock_fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF,
+			  &prog_fd, sizeof(prog_fd));
+}
+
+static __u64 cookie(int fd)
+{
+	__u64 cookie = 0;
+	socklen_t cookie_len = sizeof(cookie);
+	int ret;
+
+	ret = getsockopt(fd, SOL_SOCKET, SO_COOKIE, &cookie, &cookie_len);
+	ASSERT_OK(ret, "cookie");
+	ASSERT_GT(cookie, 0, "cookie_invalid");
+
+	return cookie;
+}
+
+static int echo_test_udp(int fd_sv)
+{
+	struct sockaddr_storage addr = {};
+	socklen_t len = sizeof(addr);
+	char buff[1] = {};
+	int fd_cl = -1, ret;
+
+	fd_cl = connect_to_fd(fd_sv, 100);
+	ASSERT_GT(fd_cl, 0, "create_client");
+	ASSERT_EQ(getsockname(fd_cl, (void *)&addr, &len), 0, "getsockname");
+
+	ASSERT_EQ(send(fd_cl, buff, sizeof(buff), 0), 1, "send_client");
+
+	ret = recv(fd_sv, buff, sizeof(buff), 0);
+	if (ret < 0) {
+		close(fd_cl);
+		return errno;
+	}
+
+	ASSERT_EQ(ret, 1, "recv_server");
+	ASSERT_EQ(sendto(fd_sv, buff, sizeof(buff), 0, (void *)&addr, len), 1, "send_server");
+	ASSERT_EQ(recv(fd_cl, buff, sizeof(buff), 0), 1, "recv_client");
+	close(fd_cl);
+	return 0;
+}
+
+static int echo_test_tcp(int fd_sv)
+{
+	char buff[1] = {};
+	int fd_cl = -1, fd_sv_cl = -1;
+
+	fd_cl = connect_to_fd(fd_sv, 100);
+	if (fd_cl < 0)
+		return errno;
+
+	fd_sv_cl = accept(fd_sv, NULL, NULL);
+	ASSERT_GE(fd_sv_cl, 0, "accept_fd");
+
+	ASSERT_EQ(send(fd_cl, buff, sizeof(buff), 0), 1, "send_client");
+	ASSERT_EQ(recv(fd_sv_cl, buff, sizeof(buff), 0), 1, "recv_server");
+	ASSERT_EQ(send(fd_sv_cl, buff, sizeof(buff), 0), 1, "send_server");
+	ASSERT_EQ(recv(fd_cl, buff, sizeof(buff), 0), 1, "recv_client");
+	close(fd_sv_cl);
+	close(fd_cl);
+	return 0;
+}
+
+void run_assign_reuse(int family, int sotype, const char *ip, __u16 port)
+{
+	DECLARE_LIBBPF_OPTS(bpf_tc_hook, tc_hook,
+		.ifindex = LOOPBACK,
+		.attach_point = BPF_TC_INGRESS,
+	);
+	DECLARE_LIBBPF_OPTS(bpf_tc_opts, tc_opts,
+		.handle = 1,
+		.priority = 1,
+	);
+	bool hook_created = false, tc_attached = false;
+	int ret, fd_tc, fd_accept, fd_drop, fd_map;
+	int *fd_sv = NULL;
+	__u64 fd_val;
+	struct test_assign_reuse *skel;
+	const int zero = 0;
+
+	skel = test_assign_reuse__open();
+	if (!ASSERT_OK_PTR(skel, "skel_open"))
+		goto cleanup;
+
+	skel->rodata->dest_port = port;
+
+	ret = test_assign_reuse__load(skel);
+	if (!ASSERT_OK(ret, "skel_load"))
+		goto cleanup;
+
+	ASSERT_EQ(skel->bss->sk_cookie_seen, 0, "cookie_init");
+
+	fd_tc = bpf_program__fd(skel->progs.tc_main);
+	fd_accept = bpf_program__fd(skel->progs.reuse_accept);
+	fd_drop = bpf_program__fd(skel->progs.reuse_drop);
+	fd_map = bpf_map__fd(skel->maps.sk_map);
+
+	fd_sv = start_reuseport_server(family, sotype, ip, port, 100, 1);
+	if (!ASSERT_NEQ(fd_sv, NULL, "start_reuseport_server"))
+		goto cleanup;
+
+	ret = attach_reuseport(*fd_sv, fd_drop);
+	if (!ASSERT_OK(ret, "attach_reuseport"))
+		goto cleanup;
+
+	fd_val = *fd_sv;
+	ret = bpf_map_update_elem(fd_map, &zero, &fd_val, BPF_NOEXIST);
+	if (!ASSERT_OK(ret, "bpf_sk_map"))
+		goto cleanup;
+
+	ret = bpf_tc_hook_create(&tc_hook);
+	if (ret == 0)
+		hook_created = true;
+	ret = ret == -EEXIST ? 0 : ret;
+	if (!ASSERT_OK(ret, "bpf_tc_hook_create"))
+		goto cleanup;
+
+	tc_opts.prog_fd = fd_tc;
+	ret = bpf_tc_attach(&tc_hook, &tc_opts);
+	if (!ASSERT_OK(ret, "bpf_tc_attach"))
+		goto cleanup;
+	tc_attached = true;
+
+	if (sotype == SOCK_STREAM)
+		ASSERT_EQ(echo_test_tcp(*fd_sv), ECONNREFUSED, "drop_tcp");
+	else
+		ASSERT_EQ(echo_test_udp(*fd_sv), EAGAIN, "drop_udp");
+	ASSERT_EQ(skel->bss->reuseport_executed, 1, "program executed once");
+
+	skel->bss->sk_cookie_seen = 0;
+	skel->bss->reuseport_executed = 0;
+	ASSERT_OK(attach_reuseport(*fd_sv, fd_accept), "attach_reuseport(accept)");
+
+	if (sotype == SOCK_STREAM)
+		ASSERT_EQ(echo_test_tcp(*fd_sv), 0, "echo_tcp");
+	else
+		ASSERT_EQ(echo_test_udp(*fd_sv), 0, "echo_udp");
+
+	ASSERT_EQ(skel->bss->sk_cookie_seen, cookie(*fd_sv),
+		  "cookie_mismatch");
+	ASSERT_EQ(skel->bss->reuseport_executed, 1, "program executed once");
+cleanup:
+	if (tc_attached) {
+		tc_opts.flags = tc_opts.prog_fd = tc_opts.prog_id = 0;
+		ret = bpf_tc_detach(&tc_hook, &tc_opts);
+		ASSERT_OK(ret, "bpf_tc_detach");
+	}
+	if (hook_created) {
+		tc_hook.attach_point = BPF_TC_INGRESS | BPF_TC_EGRESS;
+		bpf_tc_hook_destroy(&tc_hook);
+	}
+	test_assign_reuse__destroy(skel);
+	free_fds(fd_sv, 1);
+}
+
+void test_assign_reuse(void)
+{
+	struct nstoken *tok = NULL;
+
+	SYS(out, "ip netns add %s", NS_TEST);
+	SYS(cleanup, "ip -net %s link set dev lo up", NS_TEST);
+
+	tok = open_netns(NS_TEST);
+	if (!ASSERT_OK_PTR(tok, "netns token"))
+		return;
+
+	if (test__start_subtest("tcpv4"))
+		run_assign_reuse(AF_INET, SOCK_STREAM, "127.0.0.1", PORT);
+	if (test__start_subtest("tcpv6"))
+		run_assign_reuse(AF_INET6, SOCK_STREAM, "::1", PORT);
+	if (test__start_subtest("udpv4"))
+		run_assign_reuse(AF_INET, SOCK_DGRAM, "127.0.0.1", PORT);
+	if (test__start_subtest("udpv6"))
+		run_assign_reuse(AF_INET6, SOCK_DGRAM, "::1", PORT);
+
+cleanup:
+	close_netns(tok);
+	SYS_NOFAIL("ip netns delete %s", NS_TEST);
+out:
+	return;
+}

tools/testing/selftests/bpf/prog_tests/ip_check_defrag.c

···
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+#include <net/if.h>
+#include <linux/netfilter.h>
+#include <network_helpers.h>
+#include "ip_check_defrag.skel.h"
+#include "ip_check_defrag_frags.h"
+
+/*
+ * This selftest spins up a client and an echo server, each in their own
+ * network namespace. The client will send a fragmented message to the server.
+ * The prog attached to the server will shoot down any fragments. Thus, if
+ * the server is able to correctly echo back the message to the client, we will
+ * have verified that netfilter is reassembling packets for us.
+ *
+ * Topology:
+ * =========
+ *           NS0         |         NS1
+ *                       |
+ *         client        |       server
+ *       ----------      |     ----------
+ *       |  veth0  | --------- |  veth1  |
+ *       ----------    peer    ----------
+ *                       |
+ *                       |       with bpf
+ */
+
+#define NS0		"defrag_ns0"
+#define NS1		"defrag_ns1"
+#define VETH0		"veth0"
+#define VETH1		"veth1"
+#define VETH0_ADDR	"172.16.1.100"
+#define VETH0_ADDR6	"fc00::100"
+/* The following constants must stay in sync with `generate_udp_fragments.py` */
+#define VETH1_ADDR	"172.16.1.200"
+#define VETH1_ADDR6	"fc00::200"
+#define CLIENT_PORT	48878
+#define SERVER_PORT	48879
+#define MAGIC_MESSAGE	"THIS IS THE ORIGINAL MESSAGE, PLEASE REASSEMBLE ME"
+
+static int setup_topology(bool ipv6)
+{
+	bool up;
+	int i;
+
+	SYS(fail, "ip netns add " NS0);
+	SYS(fail, "ip netns add " NS1);
+	SYS(fail, "ip link add " VETH0 " netns " NS0 " type veth peer name " VETH1 " netns " NS1);
+	if (ipv6) {
+		SYS(fail, "ip -6 -net " NS0 " addr add " VETH0_ADDR6 "/64 dev " VETH0 " nodad");
+		SYS(fail, "ip -6 -net " NS1 " addr add " VETH1_ADDR6 "/64 dev " VETH1 " nodad");
+	} else {
+		SYS(fail, "ip -net " NS0 " addr add " VETH0_ADDR "/24 dev " VETH0);
+		SYS(fail, "ip -net " NS1 " addr add " VETH1_ADDR "/24 dev " VETH1);
+	}
+	SYS(fail, "ip -net " NS0 " link set dev " VETH0 " up");
+	SYS(fail, "ip -net " NS1 " link set dev " VETH1 " up");
+
+	/* Wait for up to 5s for links to come up */
+	for (i = 0; i < 5; ++i) {
+		if (ipv6)
+			up = !system("ip netns exec " NS0 " ping -6 -c 1 -W 1 " VETH1_ADDR6 " &>/dev/null");
+		else
+			up = !system("ip netns exec " NS0 " ping -c 1 -W 1 " VETH1_ADDR " &>/dev/null");
+
+		if (up)
+			break;
+	}
+
+	return 0;
+fail:
+	return -1;
+}
+
+static void cleanup_topology(void)
+{
+	SYS_NOFAIL("test -f /var/run/netns/" NS0 " && ip netns delete " NS0);
+	SYS_NOFAIL("test -f /var/run/netns/" NS1 " && ip netns delete " NS1);
+}
+
+static int attach(struct ip_check_defrag *skel, bool ipv6)
+{
+	LIBBPF_OPTS(bpf_netfilter_opts, opts,
+		    .pf = ipv6 ? NFPROTO_IPV6 : NFPROTO_IPV4,
+		    .priority = 42,
+		    .flags = BPF_F_NETFILTER_IP_DEFRAG);
+	struct nstoken *nstoken;
+	int err = -1;
+
+	nstoken = open_netns(NS1);
+
+	skel->links.defrag = bpf_program__attach_netfilter(skel->progs.defrag, &opts);
+	if (!ASSERT_OK_PTR(skel->links.defrag, "program attach"))
+		goto out;
+
+	err = 0;
+out:
+	close_netns(nstoken);
+	return err;
+}
+
+static int send_frags(int client)
+{
+	struct sockaddr_storage saddr;
+	struct sockaddr *saddr_p;
+	socklen_t saddr_len;
+	int err;
+
+	saddr_p = (struct sockaddr *)&saddr;
+	err = make_sockaddr(AF_INET, VETH1_ADDR, SERVER_PORT, &saddr, &saddr_len);
+	if (!ASSERT_OK(err, "make_sockaddr"))
+		return -1;
+
+	err = sendto(client, frag_0, sizeof(frag_0), 0, saddr_p, saddr_len);
+	if (!ASSERT_GE(err, 0, "sendto frag_0"))
+		return -1;
+
+	err = sendto(client, frag_1, sizeof(frag_1), 0, saddr_p, saddr_len);
+	if (!ASSERT_GE(err, 0, "sendto frag_1"))
+		return -1;
+
+	err = sendto(client, frag_2, sizeof(frag_2), 0, saddr_p, saddr_len);
+	if (!ASSERT_GE(err, 0, "sendto frag_2"))
+		return -1;
+
+	return 0;
+}
+
+static int send_frags6(int client)
+{
+	struct sockaddr_storage saddr;
+	struct sockaddr *saddr_p;
+	socklen_t saddr_len;
+	int err;
+
+	saddr_p = (struct sockaddr *)&saddr;
+	/* Port needs to be set to 0 for raw ipv6 socket for some reason */
+	err = make_sockaddr(AF_INET6, VETH1_ADDR6, 0, &saddr, &saddr_len);
+	if (!ASSERT_OK(err, "make_sockaddr"))
+		return -1;
+
+	err = sendto(client, frag6_0, sizeof(frag6_0), 0, saddr_p, saddr_len);
+	if (!ASSERT_GE(err, 0, "sendto frag6_0"))
+		return -1;
+
+	err = sendto(client, frag6_1, sizeof(frag6_1), 0, saddr_p, saddr_len);
+	if (!ASSERT_GE(err, 0, "sendto frag6_1"))
+		return -1;
+
+	err = sendto(client, frag6_2, sizeof(frag6_2), 0, saddr_p, saddr_len);
+	if (!ASSERT_GE(err, 0, "sendto frag6_2"))
+		return -1;
+
+	return 0;
+}
+
+void test_bpf_ip_check_defrag_ok(bool ipv6)
+{
+	struct network_helper_opts rx_opts = {
+		.timeout_ms = 1000,
+		.noconnect = true,
+	};
+	struct network_helper_opts tx_ops = {
+		.timeout_ms = 1000,
+		.type = SOCK_RAW,
+		.proto = IPPROTO_RAW,
+		.noconnect = true,
+	};
+	struct sockaddr_storage caddr;
+	struct ip_check_defrag *skel;
+	struct nstoken *nstoken;
+	int client_tx_fd = -1;
+	int client_rx_fd = -1;
+	socklen_t caddr_len;
+	int srv_fd = -1;
+	char buf[1024];
+	int len, err;
+
+	skel = ip_check_defrag__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel_open"))
+		return;
+
+	if (!ASSERT_OK(setup_topology(ipv6), "setup_topology"))
+		goto out;
+
+	if (!ASSERT_OK(attach(skel, ipv6), "attach"))
+		goto out;
+
+	/* Start server in ns1 */
+	nstoken = open_netns(NS1);
+	if (!ASSERT_OK_PTR(nstoken, "setns ns1"))
+		goto out;
+	srv_fd = start_server(ipv6 ? AF_INET6 : AF_INET, SOCK_DGRAM, NULL, SERVER_PORT, 0);
+	close_netns(nstoken);
+	if (!ASSERT_GE(srv_fd, 0, "start_server"))
+		goto out;
+
+	/* Open tx raw socket in ns0 */
+	nstoken = open_netns(NS0);
+	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
+		goto out;
+	client_tx_fd = connect_to_fd_opts(srv_fd, &tx_ops);
+	close_netns(nstoken);
+	if (!ASSERT_GE(client_tx_fd, 0, "connect_to_fd_opts"))
+		goto out;
+
+	/* Open rx socket in ns0 */
+	nstoken = open_netns(NS0);
+	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
+		goto out;
+	client_rx_fd = connect_to_fd_opts(srv_fd, &rx_opts);
+	close_netns(nstoken);
+	if (!ASSERT_GE(client_rx_fd, 0, "connect_to_fd_opts"))
+		goto out;
+
+	/* Bind rx socket to a premeditated port */
+	memset(&caddr, 0, sizeof(caddr));
+	nstoken = open_netns(NS0);
+	if (!ASSERT_OK_PTR(nstoken, "setns ns0"))
+		goto out;
+	if (ipv6) {
+		struct sockaddr_in6 *c = (struct sockaddr_in6 *)&caddr;
+
+		c->sin6_family = AF_INET6;
+		inet_pton(AF_INET6, VETH0_ADDR6, &c->sin6_addr);
+		c->sin6_port = htons(CLIENT_PORT);
+		err = bind(client_rx_fd, (struct sockaddr *)c, sizeof(*c));
+	} else {
+		struct sockaddr_in *c = (struct sockaddr_in *)&caddr;
+
+		c->sin_family = AF_INET;
+		inet_pton(AF_INET, VETH0_ADDR, &c->sin_addr);
+		c->sin_port = htons(CLIENT_PORT);
+		err = bind(client_rx_fd, (struct sockaddr *)c, sizeof(*c));
+	}
+	close_netns(nstoken);
+	if (!ASSERT_OK(err, "bind"))
+		goto out;
+
+	/* Send message in fragments */
+	if (ipv6) {
+		if (!ASSERT_OK(send_frags6(client_tx_fd), "send_frags6"))
+			goto out;
+	} else {
+		if (!ASSERT_OK(send_frags(client_tx_fd), "send_frags"))
+			goto out;
+	}
+
+	if (!ASSERT_EQ(skel->bss->shootdowns, 0, "shootdowns"))
+		goto out;
+
+	/* Receive reassembled msg on server and echo back to client */
+	caddr_len = sizeof(caddr);
+	len = recvfrom(srv_fd, buf, sizeof(buf), 0, (struct sockaddr *)&caddr, &caddr_len);
+	if (!ASSERT_GE(len, 0, "server recvfrom"))
+		goto out;
+	len = sendto(srv_fd, buf, len, 0, (struct sockaddr *)&caddr, caddr_len);
+	if (!ASSERT_GE(len, 0, "server sendto"))
+		goto out;
+
+	/* Expect reassembed message to be echoed back */
+	len = recvfrom(client_rx_fd, buf, sizeof(buf), 0, NULL, NULL);
+	if (!ASSERT_EQ(len, sizeof(MAGIC_MESSAGE) - 1, "client short read"))
+		goto out;
+
+out:
+	if (client_rx_fd != -1)
+		close(client_rx_fd);
+	if (client_tx_fd != -1)
+		close(client_tx_fd);
+	if (srv_fd != -1)
+		close(srv_fd);
+	cleanup_topology();
+	ip_check_defrag__destroy(skel);
+}
+
+void test_bpf_ip_check_defrag(void)
+{
+	if (test__start_subtest("v4"))
+		test_bpf_ip_check_defrag_ok(false);
+	if (test__start_subtest("v6"))
+		test_bpf_ip_check_defrag_ok(true);
+}

tools/testing/selftests/bpf/prog_tests/test_ldsx_insn.c

···
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates.*/
+
+#include <test_progs.h>
+#include <network_helpers.h>
+#include "test_ldsx_insn.skel.h"
+
+static void test_map_val_and_probed_memory(void)
+{
+	struct test_ldsx_insn *skel;
+	int err;
+
+	skel = test_ldsx_insn__open();
+	if (!ASSERT_OK_PTR(skel, "test_ldsx_insn__open"))
+		return;
+
+	if (skel->rodata->skip) {
+		test__skip();
+		goto out;
+	}
+
+	bpf_program__set_autoload(skel->progs.rdonly_map_prog, true);
+	bpf_program__set_autoload(skel->progs.map_val_prog, true);
+	bpf_program__set_autoload(skel->progs.test_ptr_struct_arg, true);
+
+	err = test_ldsx_insn__load(skel);
+	if (!ASSERT_OK(err, "test_ldsx_insn__load"))
+		goto out;
+
+	err = test_ldsx_insn__attach(skel);
+	if (!ASSERT_OK(err, "test_ldsx_insn__attach"))
+		goto out;
+
+	ASSERT_OK(trigger_module_test_read(256), "trigger_read");
+
+	ASSERT_EQ(skel->bss->done1, 1, "done1");
+	ASSERT_EQ(skel->bss->ret1, 1, "ret1");
+	ASSERT_EQ(skel->bss->done2, 1, "done2");
+	ASSERT_EQ(skel->bss->ret2, 1, "ret2");
+	ASSERT_EQ(skel->bss->int_member, -1, "int_member");
+
+out:
+	test_ldsx_insn__destroy(skel);
+}
+
+static void test_ctx_member_sign_ext(void)
+{
+	struct test_ldsx_insn *skel;
+	int err, fd, cgroup_fd;
+	char buf[16] = {0};
+	socklen_t optlen;
+
+	cgroup_fd = test__join_cgroup("/ldsx_test");
+	if (!ASSERT_GE(cgroup_fd, 0, "join_cgroup /ldsx_test"))
+		return;
+
+	skel = test_ldsx_insn__open();
+	if (!ASSERT_OK_PTR(skel, "test_ldsx_insn__open"))
+		goto close_cgroup_fd;
+
+	if (skel->rodata->skip) {
+		test__skip();
+		goto destroy_skel;
+	}
+
+	bpf_program__set_autoload(skel->progs._getsockopt, true);
+
+	err = test_ldsx_insn__load(skel);
+	if (!ASSERT_OK(err, "test_ldsx_insn__load"))
+		goto destroy_skel;
+
+	skel->links._getsockopt =
+		bpf_program__attach_cgroup(skel->progs._getsockopt, cgroup_fd);
+	if (!ASSERT_OK_PTR(skel->links._getsockopt, "getsockopt_link"))
+		goto destroy_skel;
+
+	fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (!ASSERT_GE(fd, 0, "socket"))
+		goto destroy_skel;
+
+	optlen = sizeof(buf);
+	(void)getsockopt(fd, SOL_IP, IP_TTL, buf, &optlen);
+
+	ASSERT_EQ(skel->bss->set_optlen, -1, "optlen");
+	ASSERT_EQ(skel->bss->set_retval, -1, "retval");
+
+	close(fd);
+destroy_skel:
+	test_ldsx_insn__destroy(skel);
+close_cgroup_fd:
+	close(cgroup_fd);
+}
+
+static void test_ctx_member_narrow_sign_ext(void)
+{
+	struct test_ldsx_insn *skel;
+	struct __sk_buff skb = {};
+	LIBBPF_OPTS(bpf_test_run_opts, topts,
+		    .data_in = &pkt_v4,
+		    .data_size_in = sizeof(pkt_v4),
+		    .ctx_in = &skb,
+		    .ctx_size_in = sizeof(skb),
+	);
+	int err, prog_fd;
+
+	skel = test_ldsx_insn__open();
+	if (!ASSERT_OK_PTR(skel, "test_ldsx_insn__open"))
+		return;
+
+	if (skel->rodata->skip) {
+		test__skip();
+		goto out;
+	}
+
+	bpf_program__set_autoload(skel->progs._tc, true);
+
+	err = test_ldsx_insn__load(skel);
+	if (!ASSERT_OK(err, "test_ldsx_insn__load"))
+		goto out;
+
+	prog_fd = bpf_program__fd(skel->progs._tc);
+	err = bpf_prog_test_run_opts(prog_fd, &topts);
+	ASSERT_OK(err, "test_run");
+
+	ASSERT_EQ(skel->bss->set_mark, -2, "set_mark");
+
+out:
+	test_ldsx_insn__destroy(skel);
+}
+
+void test_ldsx_insn(void)
+{
+	if (test__start_subtest("map_val and probed_memory"))
+		test_map_val_and_probed_memory();
+	if (test__start_subtest("ctx_member_sign_ext"))
+		test_ctx_member_sign_ext();
+	if (test__start_subtest("ctx_member_narrow_sign_ext"))
+		test_ctx_member_narrow_sign_ext();
+}

tools/testing/selftests/bpf/prog_tests/verifier.c

···
 #include "verifier_bounds_deduction_non_const.skel.h"
 #include "verifier_bounds_mix_sign_unsign.skel.h"
 #include "verifier_bpf_get_stack.skel.h"
+#include "verifier_bswap.skel.h"
 #include "verifier_btf_ctx_access.skel.h"
 #include "verifier_cfg.skel.h"
 #include "verifier_cgroup_inv_retcode.skel.h"
···
 #include "verifier_direct_stack_access_wraparound.skel.h"
 #include "verifier_div0.skel.h"
 #include "verifier_div_overflow.skel.h"
+#include "verifier_gotol.skel.h"
 #include "verifier_helper_access_var_len.skel.h"
 #include "verifier_helper_packet_access.skel.h"
 #include "verifier_helper_restricted.skel.h"
···
 #include "verifier_int_ptr.skel.h"
 #include "verifier_jeq_infer_not_null.skel.h"
 #include "verifier_ld_ind.skel.h"
+#include "verifier_ldsx.skel.h"
 #include "verifier_leak_ptr.skel.h"
 #include "verifier_loops1.skel.h"
 #include "verifier_lwt.skel.h"
···
 #include "verifier_map_ret_val.skel.h"
 #include "verifier_masking.skel.h"
 #include "verifier_meta_access.skel.h"
+#include "verifier_movsx.skel.h"
 #include "verifier_netfilter_ctx.skel.h"
 #include "verifier_netfilter_retcode.skel.h"
 #include "verifier_prevent_map_lookup.skel.h"
···
 #include "verifier_ringbuf.skel.h"
 #include "verifier_runtime_jit.skel.h"
 #include "verifier_scalar_ids.skel.h"
+#include "verifier_sdiv.skel.h"
 #include "verifier_search_pruning.skel.h"
 #include "verifier_sock.skel.h"
 #include "verifier_spill_fill.skel.h"
···
 void test_verifier_bounds_deduction_non_const(void)     { RUN(verifier_bounds_deduction_non_const); }
 void test_verifier_bounds_mix_sign_unsign(void) { RUN(verifier_bounds_mix_sign_unsign); }
 void test_verifier_bpf_get_stack(void)        { RUN(verifier_bpf_get_stack); }
+void test_verifier_bswap(void)                { RUN(verifier_bswap); }
 void test_verifier_btf_ctx_access(void)       { RUN(verifier_btf_ctx_access); }
 void test_verifier_cfg(void)                  { RUN(verifier_cfg); }
 void test_verifier_cgroup_inv_retcode(void)   { RUN(verifier_cgroup_inv_retcode); }
···
 void test_verifier_direct_stack_access_wraparound(void) { RUN(verifier_direct_stack_access_wraparound); }
 void test_verifier_div0(void)                 { RUN(verifier_div0); }
 void test_verifier_div_overflow(void)         { RUN(verifier_div_overflow); }
+void test_verifier_gotol(void)                { RUN(verifier_gotol); }
 void test_verifier_helper_access_var_len(void) { RUN(verifier_helper_access_var_len); }
 void test_verifier_helper_packet_access(void) { RUN(verifier_helper_packet_access); }
 void test_verifier_helper_restricted(void)    { RUN(verifier_helper_restricted); }
···
 void test_verifier_int_ptr(void)              { RUN(verifier_int_ptr); }
 void test_verifier_jeq_infer_not_null(void)   { RUN(verifier_jeq_infer_not_null); }
 void test_verifier_ld_ind(void)               { RUN(verifier_ld_ind); }
+void test_verifier_ldsx(void)                  { RUN(verifier_ldsx); }
 void test_verifier_leak_ptr(void)             { RUN(verifier_leak_ptr); }
 void test_verifier_loops1(void)               { RUN(verifier_loops1); }
 void test_verifier_lwt(void)                  { RUN(verifier_lwt); }
···
 void test_verifier_map_ret_val(void)          { RUN(verifier_map_ret_val); }
 void test_verifier_masking(void)              { RUN(verifier_masking); }
 void test_verifier_meta_access(void)          { RUN(verifier_meta_access); }
+void test_verifier_movsx(void)                 { RUN(verifier_movsx); }
 void test_verifier_netfilter_ctx(void)        { RUN(verifier_netfilter_ctx); }
 void test_verifier_netfilter_retcode(void)    { RUN(verifier_netfilter_retcode); }
 void test_verifier_prevent_map_lookup(void)   { RUN(verifier_prevent_map_lookup); }
···
 void test_verifier_ringbuf(void)              { RUN(verifier_ringbuf); }
 void test_verifier_runtime_jit(void)          { RUN(verifier_runtime_jit); }
 void test_verifier_scalar_ids(void)           { RUN(verifier_scalar_ids); }
+void test_verifier_sdiv(void)                 { RUN(verifier_sdiv); }
 void test_verifier_search_pruning(void)       { RUN(verifier_search_pruning); }
 void test_verifier_sock(void)                 { RUN(verifier_sock); }
 void test_verifier_spill_fill(void)           { RUN(verifier_spill_fill); }

tools/testing/selftests/bpf/prog_tests/xdp_attach.c

···
 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
+#include "test_xdp_attach_fail.skel.h"
 
 #define IFINDEX_LO 1
 #define XDP_FLAGS_REPLACE		(1U << 4)
···
 	bpf_object__close(obj1);
 }
 
+#define ERRMSG_LEN 64
+
+struct xdp_errmsg {
+	char msg[ERRMSG_LEN];
+};
+
+static void on_xdp_errmsg(void *ctx, int cpu, void *data, __u32 size)
+{
+	struct xdp_errmsg *ctx_errmg = ctx, *tp_errmsg = data;
+
+	memcpy(&ctx_errmg->msg, &tp_errmsg->msg, ERRMSG_LEN);
+}
+
+static const char tgt_errmsg[] = "Invalid XDP flags for BPF link attachment";
+
+static void test_xdp_attach_fail(const char *file)
+{
+	struct test_xdp_attach_fail *skel = NULL;
+	struct xdp_errmsg errmsg = {};
+	struct perf_buffer *pb = NULL;
+	struct bpf_object *obj = NULL;
+	int err, fd_xdp;
+
+	LIBBPF_OPTS(bpf_link_create_opts, opts);
+
+	skel = test_xdp_attach_fail__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "test_xdp_attach_fail__open_and_load"))
+		goto out_close;
+
+	err = test_xdp_attach_fail__attach(skel);
+	if (!ASSERT_EQ(err, 0, "test_xdp_attach_fail__attach"))
+		goto out_close;
+
+	/* set up perf buffer */
+	pb = perf_buffer__new(bpf_map__fd(skel->maps.xdp_errmsg_pb), 1,
+			      on_xdp_errmsg, NULL, &errmsg, NULL);
+	if (!ASSERT_OK_PTR(pb, "perf_buffer__new"))
+		goto out_close;
+
+	err = bpf_prog_test_load(file, BPF_PROG_TYPE_XDP, &obj, &fd_xdp);
+	if (!ASSERT_EQ(err, 0, "bpf_prog_test_load"))
+		goto out_close;
+
+	opts.flags = 0xFF; // invalid flags to fail to attach XDP prog
+	err = bpf_link_create(fd_xdp, IFINDEX_LO, BPF_XDP, &opts);
+	if (!ASSERT_EQ(err, -EINVAL, "bpf_link_create"))
+		goto out_close;
+
+	/* read perf buffer */
+	err = perf_buffer__poll(pb, 100);
+	if (!ASSERT_GT(err, -1, "perf_buffer__poll"))
+		goto out_close;
+
+	ASSERT_STRNEQ((const char *) errmsg.msg, tgt_errmsg,
+		      42 /* strlen(tgt_errmsg) */, "check error message");
+
+out_close:
+	perf_buffer__free(pb);
+	bpf_object__close(obj);
+	test_xdp_attach_fail__destroy(skel);
+}
+
 void serial_test_xdp_attach(void)
 {
 	if (test__start_subtest("xdp_attach"))
 		test_xdp_attach("./test_xdp.bpf.o");
 	if (test__start_subtest("xdp_attach_dynptr"))
 		test_xdp_attach("./test_xdp_dynptr.bpf.o");
+	if (test__start_subtest("xdp_attach_failed"))
+		test_xdp_attach_fail("./xdp_dummy.bpf.o");
 }

tools/testing/selftests/bpf/progs/ip_check_defrag.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_endian.h>
+#include "bpf_tracing_net.h"
+
+#define NF_DROP			0
+#define NF_ACCEPT		1
+#define ETH_P_IP		0x0800
+#define ETH_P_IPV6		0x86DD
+#define IP_MF			0x2000
+#define IP_OFFSET		0x1FFF
+#define NEXTHDR_FRAGMENT	44
+
+extern int bpf_dynptr_from_skb(struct sk_buff *skb, __u64 flags,
+			      struct bpf_dynptr *ptr__uninit) __ksym;
+extern void *bpf_dynptr_slice(const struct bpf_dynptr *ptr, uint32_t offset,
+			      void *buffer, uint32_t buffer__sz) __ksym;
+
+volatile int shootdowns = 0;
+
+static bool is_frag_v4(struct iphdr *iph)
+{
+	int offset;
+	int flags;
+
+	offset = bpf_ntohs(iph->frag_off);
+	flags = offset & ~IP_OFFSET;
+	offset &= IP_OFFSET;
+	offset <<= 3;
+
+	return (flags & IP_MF) || offset;
+}
+
+static bool is_frag_v6(struct ipv6hdr *ip6h)
+{
+	/* Simplifying assumption that there are no extension headers
+	 * between fixed header and fragmentation header. This assumption
+	 * is only valid in this test case. It saves us the hassle of
+	 * searching all potential extension headers.
+	 */
+	return ip6h->nexthdr == NEXTHDR_FRAGMENT;
+}
+
+static int handle_v4(struct sk_buff *skb)
+{
+	struct bpf_dynptr ptr;
+	u8 iph_buf[20] = {};
+	struct iphdr *iph;
+
+	if (bpf_dynptr_from_skb(skb, 0, &ptr))
+		return NF_DROP;
+
+	iph = bpf_dynptr_slice(&ptr, 0, iph_buf, sizeof(iph_buf));
+	if (!iph)
+		return NF_DROP;
+
+	/* Shootdown any frags */
+	if (is_frag_v4(iph)) {
+		shootdowns++;
+		return NF_DROP;
+	}
+
+	return NF_ACCEPT;
+}
+
+static int handle_v6(struct sk_buff *skb)
+{
+	struct bpf_dynptr ptr;
+	struct ipv6hdr *ip6h;
+	u8 ip6h_buf[40] = {};
+
+	if (bpf_dynptr_from_skb(skb, 0, &ptr))
+		return NF_DROP;
+
+	ip6h = bpf_dynptr_slice(&ptr, 0, ip6h_buf, sizeof(ip6h_buf));
+	if (!ip6h)
+		return NF_DROP;
+
+	/* Shootdown any frags */
+	if (is_frag_v6(ip6h)) {
+		shootdowns++;
+		return NF_DROP;
+	}
+
+	return NF_ACCEPT;
+}
+
+SEC("netfilter")
+int defrag(struct bpf_nf_ctx *ctx)
+{
+	struct sk_buff *skb = ctx->skb;
+
+	switch (bpf_ntohs(skb->protocol)) {
+	case ETH_P_IP:
+		return handle_v4(skb);
+	case ETH_P_IPV6:
+		return handle_v6(skb);
+	default:
+		return NF_ACCEPT;
+	}
+}
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/test_assign_reuse.c

···
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2023 Isovalent */
+#include <stdbool.h>
+#include <linux/bpf.h>
+#include <linux/if_ether.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <bpf/bpf_endian.h>
+#include <bpf/bpf_helpers.h>
+#include <linux/pkt_cls.h>
+
+char LICENSE[] SEC("license") = "GPL";
+
+__u64 sk_cookie_seen;
+__u64 reuseport_executed;
+union {
+	struct tcphdr tcp;
+	struct udphdr udp;
+} headers;
+
+const volatile __u16 dest_port;
+
+struct {
+	__uint(type, BPF_MAP_TYPE_SOCKMAP);
+	__uint(max_entries, 1);
+	__type(key, __u32);
+	__type(value, __u64);
+} sk_map SEC(".maps");
+
+SEC("sk_reuseport")
+int reuse_accept(struct sk_reuseport_md *ctx)
+{
+	reuseport_executed++;
+
+	if (ctx->ip_protocol == IPPROTO_TCP) {
+		if (ctx->data + sizeof(headers.tcp) > ctx->data_end)
+			return SK_DROP;
+
+		if (__builtin_memcmp(&headers.tcp, ctx->data, sizeof(headers.tcp)) != 0)
+			return SK_DROP;
+	} else if (ctx->ip_protocol == IPPROTO_UDP) {
+		if (ctx->data + sizeof(headers.udp) > ctx->data_end)
+			return SK_DROP;
+
+		if (__builtin_memcmp(&headers.udp, ctx->data, sizeof(headers.udp)) != 0)
+			return SK_DROP;
+	} else {
+		return SK_DROP;
+	}
+
+	sk_cookie_seen = bpf_get_socket_cookie(ctx->sk);
+	return SK_PASS;
+}
+
+SEC("sk_reuseport")
+int reuse_drop(struct sk_reuseport_md *ctx)
+{
+	reuseport_executed++;
+	sk_cookie_seen = 0;
+	return SK_DROP;
+}
+
+static int
+assign_sk(struct __sk_buff *skb)
+{
+	int zero = 0, ret = 0;
+	struct bpf_sock *sk;
+
+	sk = bpf_map_lookup_elem(&sk_map, &zero);
+	if (!sk)
+		return TC_ACT_SHOT;
+	ret = bpf_sk_assign(skb, sk, 0);
+	bpf_sk_release(sk);
+	return ret ? TC_ACT_SHOT : TC_ACT_OK;
+}
+
+static bool
+maybe_assign_tcp(struct __sk_buff *skb, struct tcphdr *th)
+{
+	if (th + 1 > (void *)(long)(skb->data_end))
+		return TC_ACT_SHOT;
+
+	if (!th->syn || th->ack || th->dest != bpf_htons(dest_port))
+		return TC_ACT_OK;
+
+	__builtin_memcpy(&headers.tcp, th, sizeof(headers.tcp));
+	return assign_sk(skb);
+}
+
+static bool
+maybe_assign_udp(struct __sk_buff *skb, struct udphdr *uh)
+{
+	if (uh + 1 > (void *)(long)(skb->data_end))
+		return TC_ACT_SHOT;
+
+	if (uh->dest != bpf_htons(dest_port))
+		return TC_ACT_OK;
+
+	__builtin_memcpy(&headers.udp, uh, sizeof(headers.udp));
+	return assign_sk(skb);
+}
+
+SEC("tc")
+int tc_main(struct __sk_buff *skb)
+{
+	void *data_end = (void *)(long)skb->data_end;
+	void *data = (void *)(long)skb->data;
+	struct ethhdr *eth;
+
+	eth = (struct ethhdr *)(data);
+	if (eth + 1 > data_end)
+		return TC_ACT_SHOT;
+
+	if (eth->h_proto == bpf_htons(ETH_P_IP)) {
+		struct iphdr *iph = (struct iphdr *)(data + sizeof(*eth));
+
+		if (iph + 1 > data_end)
+			return TC_ACT_SHOT;
+
+		if (iph->protocol == IPPROTO_TCP)
+			return maybe_assign_tcp(skb, (struct tcphdr *)(iph + 1));
+		else if (iph->protocol == IPPROTO_UDP)
+			return maybe_assign_udp(skb, (struct udphdr *)(iph + 1));
+		else
+			return TC_ACT_SHOT;
+	} else {
+		struct ipv6hdr *ip6h = (struct ipv6hdr *)(data + sizeof(*eth));
+
+		if (ip6h + 1 > data_end)
+			return TC_ACT_SHOT;
+
+		if (ip6h->nexthdr == IPPROTO_TCP)
+			return maybe_assign_tcp(skb, (struct tcphdr *)(ip6h + 1));
+		else if (ip6h->nexthdr == IPPROTO_UDP)
+			return maybe_assign_udp(skb, (struct udphdr *)(ip6h + 1));
+		else
+			return TC_ACT_SHOT;
+	}
+}

tools/testing/selftests/bpf/progs/test_cls_redirect.h

···
 #include <linux/ipv6.h>
 #include <linux/udp.h>
 
+/* offsetof() is used in static asserts, and the libbpf-redefined CO-RE
+ * friendly version breaks compilation for older clang versions <= 15
+ * when invoked in a static assert.  Restore original here.
+ */
+#ifdef offsetof
+#undef offsetof
+#define offsetof(type, member) __builtin_offsetof(type, member)
+#endif
+
 struct gre_base_hdr {
 	uint16_t flags;
 	uint16_t protocol;

tools/testing/selftests/bpf/progs/test_ldsx_insn.c

···
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+const volatile int skip = 0;
+#else
+const volatile int skip = 1;
+#endif
+
+volatile const short val1 = -1;
+volatile const int val2 = -1;
+short val3 = -1;
+int val4 = -1;
+int done1, done2, ret1, ret2;
+
+SEC("?raw_tp/sys_enter")
+int rdonly_map_prog(const void *ctx)
+{
+	if (done1)
+		return 0;
+
+	done1 = 1;
+	/* val1/val2 readonly map */
+	if (val1 == val2)
+		ret1 = 1;
+	return 0;
+
+}
+
+SEC("?raw_tp/sys_enter")
+int map_val_prog(const void *ctx)
+{
+	if (done2)
+		return 0;
+
+	done2 = 1;
+	/* val1/val2 regular read/write map */
+	if (val3 == val4)
+		ret2 = 1;
+	return 0;
+
+}
+
+struct bpf_testmod_struct_arg_1 {
+	int a;
+};
+
+long long int_member;
+
+SEC("?fentry/bpf_testmod_test_arg_ptr_to_struct")
+int BPF_PROG2(test_ptr_struct_arg, struct bpf_testmod_struct_arg_1 *, p)
+{
+	/* probed memory access */
+	int_member = p->a;
+        return 0;
+}
+
+long long set_optlen, set_retval;
+
+SEC("?cgroup/getsockopt")
+int _getsockopt(volatile struct bpf_sockopt *ctx)
+{
+	int old_optlen, old_retval;
+
+	old_optlen = ctx->optlen;
+	old_retval = ctx->retval;
+
+	ctx->optlen = -1;
+	ctx->retval = -1;
+
+	/* sign extension for ctx member */
+	set_optlen = ctx->optlen;
+	set_retval = ctx->retval;
+
+	ctx->optlen = old_optlen;
+	ctx->retval = old_retval;
+
+	return 0;
+}
+
+long long set_mark;
+
+SEC("?tc")
+int _tc(volatile struct __sk_buff *skb)
+{
+	long long tmp_mark;
+	int old_mark;
+
+	old_mark = skb->mark;
+
+	skb->mark = 0xf6fe;
+
+	/* narrowed sign extension for ctx member */
+#if __clang_major__ >= 18
+	/* force narrow one-byte signed load. Otherwise, compiler may
+	 * generate a 32-bit unsigned load followed by an s8 movsx.
+	 */
+	asm volatile ("r1 = *(s8 *)(%[ctx] + %[off_mark])\n\t"
+		      "%[tmp_mark] = r1"
+		      : [tmp_mark]"=r"(tmp_mark)
+		      : [ctx]"r"(skb),
+			[off_mark]"i"(offsetof(struct __sk_buff, mark))
+		      : "r1");
+#else
+	tmp_mark = (char)skb->mark;
+#endif
+	set_mark = tmp_mark;
+
+	skb->mark = old_mark;
+
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/test_xdp_attach_fail.c

···
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright Leon Hwang */
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+#define ERRMSG_LEN 64
+
+struct xdp_errmsg {
+	char msg[ERRMSG_LEN];
+};
+
+struct {
+	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
+	__type(key, int);
+	__type(value, int);
+} xdp_errmsg_pb SEC(".maps");
+
+struct xdp_attach_error_ctx {
+	unsigned long unused;
+
+	/*
+	 * bpf does not support tracepoint __data_loc directly.
+	 *
+	 * Actually, this field is a 32 bit integer whose value encodes
+	 * information on where to find the actual data. The first 2 bytes is
+	 * the size of the data. The last 2 bytes is the offset from the start
+	 * of the tracepoint struct where the data begins.
+	 * -- https://github.com/iovisor/bpftrace/pull/1542
+	 */
+	__u32 msg; // __data_loc char[] msg;
+};
+
+/*
+ * Catch the error message at the tracepoint.
+ */
+
+SEC("tp/xdp/bpf_xdp_link_attach_failed")
+int tp__xdp__bpf_xdp_link_attach_failed(struct xdp_attach_error_ctx *ctx)
+{
+	char *msg = (void *)(__u64) ((void *) ctx + (__u16) ctx->msg);
+	struct xdp_errmsg errmsg = {};
+
+	bpf_probe_read_kernel_str(&errmsg.msg, ERRMSG_LEN, msg);
+	bpf_perf_event_output(ctx, &xdp_errmsg_pb, BPF_F_CURRENT_CPU, &errmsg,
+			      ERRMSG_LEN);
+	return 0;
+}
+
+/*
+ * Reuse the XDP program in xdp_dummy.c.
+ */
+
+char LICENSE[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/verifier_bswap.c

···
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+
+SEC("socket")
+__description("BSWAP, 16")
+__success __success_unpriv __retval(0x23ff)
+__naked void bswap_16(void)
+{
+	asm volatile ("					\
+	r0 = 0xff23;					\
+	r0 = bswap16 r0;				\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("BSWAP, 32")
+__success __success_unpriv __retval(0x23ff0000)
+__naked void bswap_32(void)
+{
+	asm volatile ("					\
+	r0 = 0xff23;					\
+	r0 = bswap32 r0;				\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("BSWAP, 64")
+__success __success_unpriv __retval(0x34ff12ff)
+__naked void bswap_64(void)
+{
+	asm volatile ("					\
+	r0 = %[u64_val] ll;					\
+	r0 = bswap64 r0;				\
+	exit;						\
+"	:
+	: [u64_val]"i"(0xff12ff34ff56ff78ull)
+	: __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+	return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/verifier_gotol.c

···
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+
+SEC("socket")
+__description("gotol, small_imm")
+__success __success_unpriv __retval(1)
+__naked void gotol_small_imm(void)
+{
+	asm volatile ("					\
+	call %[bpf_ktime_get_ns];			\
+	if r0 == 0 goto l0_%=;				\
+	gotol l1_%=;					\
+l2_%=:							\
+	gotol l3_%=;					\
+l1_%=:							\
+	r0 = 1;						\
+	gotol l2_%=;					\
+l0_%=:							\
+	r0 = 2;						\
+l3_%=:							\
+	exit;						\
+"	:
+	: __imm(bpf_ktime_get_ns)
+	: __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+	return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/verifier_ldsx.c

···
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+
+SEC("socket")
+__description("LDSX, S8")
+__success __success_unpriv __retval(-2)
+__naked void ldsx_s8(void)
+{
+	asm volatile ("					\
+	r1 = 0x3fe;					\
+	*(u64 *)(r10 - 8) = r1;				\
+	r0 = *(s8 *)(r10 - 8);				\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("LDSX, S16")
+__success __success_unpriv __retval(-2)
+__naked void ldsx_s16(void)
+{
+	asm volatile ("					\
+	r1 = 0x3fffe;					\
+	*(u64 *)(r10 - 8) = r1;				\
+	r0 = *(s16 *)(r10 - 8);				\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("LDSX, S32")
+__success __success_unpriv __retval(-1)
+__naked void ldsx_s32(void)
+{
+	asm volatile ("					\
+	r1 = 0xfffffffe;				\
+	*(u64 *)(r10 - 8) = r1;				\
+	r0 = *(s32 *)(r10 - 8);				\
+	r0 >>= 1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("LDSX, S8 range checking, privileged")
+__log_level(2) __success __retval(1)
+__msg("R1_w=scalar(smin=-128,smax=127)")
+__naked void ldsx_s8_range_priv(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	*(u64 *)(r10 - 8) = r0;				\
+	r1 = *(s8 *)(r10 - 8);				\
+	/* r1 with s8 range */				\
+	if r1 s> 0x7f goto l0_%=;			\
+	if r1 s< -0x80 goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("LDSX, S16 range checking")
+__success __success_unpriv __retval(1)
+__naked void ldsx_s16_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	*(u64 *)(r10 - 8) = r0;				\
+	r1 = *(s16 *)(r10 - 8);				\
+	/* r1 with s16 range */				\
+	if r1 s> 0x7fff goto l0_%=;			\
+	if r1 s< -0x8000 goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("LDSX, S32 range checking")
+__success __success_unpriv __retval(1)
+__naked void ldsx_s32_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	*(u64 *)(r10 - 8) = r0;				\
+	r1 = *(s32 *)(r10 - 8);				\
+	/* r1 with s16 range */				\
+	if r1 s> 0x7fffFFFF goto l0_%=;			\
+	if r1 s< -0x80000000 goto l0_%=;		\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+	return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/verifier_movsx.c

···
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+
+SEC("socket")
+__description("MOV32SX, S8")
+__success __success_unpriv __retval(0x23)
+__naked void mov32sx_s8(void)
+{
+	asm volatile ("					\
+	w0 = 0xff23;					\
+	w0 = (s8)w0;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16")
+__success __success_unpriv __retval(0xFFFFff23)
+__naked void mov32sx_s16(void)
+{
+	asm volatile ("					\
+	w0 = 0xff23;					\
+	w0 = (s16)w0;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8")
+__success __success_unpriv __retval(-2)
+__naked void mov64sx_s8(void)
+{
+	asm volatile ("					\
+	r0 = 0x1fe;					\
+	r0 = (s8)r0;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16")
+__success __success_unpriv __retval(0xf23)
+__naked void mov64sx_s16(void)
+{
+	asm volatile ("					\
+	r0 = 0xf0f23;					\
+	r0 = (s16)r0;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S32")
+__success __success_unpriv __retval(-1)
+__naked void mov64sx_s32(void)
+{
+	asm volatile ("					\
+	r0 = 0xfffffffe;				\
+	r0 = (s32)r0;					\
+	r0 >>= 1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s8_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	w1 = (s8)w0;					\
+	/* w1 with s8 range */				\
+	if w1 s> 0x7f goto l0_%=;			\
+	if w1 s< -0x80 goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s16_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	w1 = (s16)w0;					\
+	/* w1 with s16 range */				\
+	if w1 s> 0x7fff goto l0_%=;			\
+	if w1 s< -0x80ff goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16, range_check 2")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s16_range_2(void)
+{
+	asm volatile ("					\
+	r1 = 65535;					\
+	w2 = (s16)w1;					\
+	r2 >>= 1;					\
+	if r2 != 0x7fffFFFF goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 0;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s8_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	r1 = (s8)r0;					\
+	/* r1 with s8 range */				\
+	if r1 s> 0x7f goto l0_%=;			\
+	if r1 s< -0x80 goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s16_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	r1 = (s16)r0;					\
+	/* r1 with s16 range */				\
+	if r1 s> 0x7fff goto l0_%=;			\
+	if r1 s< -0x8000 goto l0_%=;			\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S32, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s32_range(void)
+{
+	asm volatile ("					\
+	call %[bpf_get_prandom_u32];			\
+	r1 = (s32)r0;					\
+	/* r1 with s32 range */				\
+	if r1 s> 0x7fffffff goto l0_%=;			\
+	if r1 s< -0x80000000 goto l0_%=;		\
+	r0 = 1;						\
+l1_%=:							\
+	exit;						\
+l0_%=:							\
+	r0 = 2;						\
+	goto l1_%=;					\
+"	:
+	: __imm(bpf_get_prandom_u32)
+	: __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+	return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/verifier_sdiv.c

···
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 1")
+__success __success_unpriv __retval(-20)
+__naked void sdiv32_non_zero_imm_1(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w0 s/= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 2")
+__success __success_unpriv __retval(-20)
+__naked void sdiv32_non_zero_imm_2(void)
+{
+	asm volatile ("					\
+	w0 = 41;					\
+	w0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 3")
+__success __success_unpriv __retval(20)
+__naked void sdiv32_non_zero_imm_3(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 4")
+__success __success_unpriv __retval(-21)
+__naked void sdiv32_non_zero_imm_4(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w0 s/= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 5")
+__success __success_unpriv __retval(-21)
+__naked void sdiv32_non_zero_imm_5(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 6")
+__success __success_unpriv __retval(21)
+__naked void sdiv32_non_zero_imm_6(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 7")
+__success __success_unpriv __retval(21)
+__naked void sdiv32_non_zero_imm_7(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w0 s/= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero imm divisor, check 8")
+__success __success_unpriv __retval(20)
+__naked void sdiv32_non_zero_imm_8(void)
+{
+	asm volatile ("					\
+	w0 = 41;					\
+	w0 s/= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 1")
+__success __success_unpriv __retval(-20)
+__naked void sdiv32_non_zero_reg_1(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w1 = 2;						\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 2")
+__success __success_unpriv __retval(-20)
+__naked void sdiv32_non_zero_reg_2(void)
+{
+	asm volatile ("					\
+	w0 = 41;					\
+	w1 = -2;					\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 3")
+__success __success_unpriv __retval(20)
+__naked void sdiv32_non_zero_reg_3(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w1 = -2;					\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 4")
+__success __success_unpriv __retval(-21)
+__naked void sdiv32_non_zero_reg_4(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w1 = 2;						\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 5")
+__success __success_unpriv __retval(-21)
+__naked void sdiv32_non_zero_reg_5(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w1 = -2;					\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 6")
+__success __success_unpriv __retval(21)
+__naked void sdiv32_non_zero_reg_6(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w1 = -2;					\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 7")
+__success __success_unpriv __retval(21)
+__naked void sdiv32_non_zero_reg_7(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w1 = 2;						\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, non-zero reg divisor, check 8")
+__success __success_unpriv __retval(20)
+__naked void sdiv32_non_zero_reg_8(void)
+{
+	asm volatile ("					\
+	w0 = 41;					\
+	w1 = 2;						\
+	w0 s/= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero imm divisor, check 1")
+__success __success_unpriv __retval(-20)
+__naked void sdiv64_non_zero_imm_1(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r0 s/= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero imm divisor, check 2")
+__success __success_unpriv __retval(-20)
+__naked void sdiv64_non_zero_imm_2(void)
+{
+	asm volatile ("					\
+	r0 = 41;					\
+	r0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero imm divisor, check 3")
+__success __success_unpriv __retval(20)
+__naked void sdiv64_non_zero_imm_3(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero imm divisor, check 4")
+__success __success_unpriv __retval(-21)
+__naked void sdiv64_non_zero_imm_4(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r0 s/= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero imm divisor, check 5")
+__success __success_unpriv __retval(-21)
+__naked void sdiv64_non_zero_imm_5(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero imm divisor, check 6")
+__success __success_unpriv __retval(21)
+__naked void sdiv64_non_zero_imm_6(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r0 s/= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero reg divisor, check 1")
+__success __success_unpriv __retval(-20)
+__naked void sdiv64_non_zero_reg_1(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r1 = 2;						\
+	r0 s/= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero reg divisor, check 2")
+__success __success_unpriv __retval(-20)
+__naked void sdiv64_non_zero_reg_2(void)
+{
+	asm volatile ("					\
+	r0 = 41;					\
+	r1 = -2;					\
+	r0 s/= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero reg divisor, check 3")
+__success __success_unpriv __retval(20)
+__naked void sdiv64_non_zero_reg_3(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r1 = -2;					\
+	r0 s/= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero reg divisor, check 4")
+__success __success_unpriv __retval(-21)
+__naked void sdiv64_non_zero_reg_4(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r1 = 2;						\
+	r0 s/= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero reg divisor, check 5")
+__success __success_unpriv __retval(-21)
+__naked void sdiv64_non_zero_reg_5(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r1 = -2;					\
+	r0 s/= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, non-zero reg divisor, check 6")
+__success __success_unpriv __retval(21)
+__naked void sdiv64_non_zero_reg_6(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r1 = -2;					\
+	r0 s/= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero imm divisor, check 1")
+__success __success_unpriv __retval(-1)
+__naked void smod32_non_zero_imm_1(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w0 s%%= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero imm divisor, check 2")
+__success __success_unpriv __retval(1)
+__naked void smod32_non_zero_imm_2(void)
+{
+	asm volatile ("					\
+	w0 = 41;					\
+	w0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero imm divisor, check 3")
+__success __success_unpriv __retval(-1)
+__naked void smod32_non_zero_imm_3(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero imm divisor, check 4")
+__success __success_unpriv __retval(0)
+__naked void smod32_non_zero_imm_4(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w0 s%%= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero imm divisor, check 5")
+__success __success_unpriv __retval(0)
+__naked void smod32_non_zero_imm_5(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero imm divisor, check 6")
+__success __success_unpriv __retval(0)
+__naked void smod32_non_zero_imm_6(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero reg divisor, check 1")
+__success __success_unpriv __retval(-1)
+__naked void smod32_non_zero_reg_1(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w1 = 2;						\
+	w0 s%%= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero reg divisor, check 2")
+__success __success_unpriv __retval(1)
+__naked void smod32_non_zero_reg_2(void)
+{
+	asm volatile ("					\
+	w0 = 41;					\
+	w1 = -2;					\
+	w0 s%%= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero reg divisor, check 3")
+__success __success_unpriv __retval(-1)
+__naked void smod32_non_zero_reg_3(void)
+{
+	asm volatile ("					\
+	w0 = -41;					\
+	w1 = -2;					\
+	w0 s%%= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero reg divisor, check 4")
+__success __success_unpriv __retval(0)
+__naked void smod32_non_zero_reg_4(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w1 = 2;						\
+	w0 s%%= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero reg divisor, check 5")
+__success __success_unpriv __retval(0)
+__naked void smod32_non_zero_reg_5(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w1 = -2;					\
+	w0 s%%= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, non-zero reg divisor, check 6")
+__success __success_unpriv __retval(0)
+__naked void smod32_non_zero_reg_6(void)
+{
+	asm volatile ("					\
+	w0 = -42;					\
+	w1 = -2;					\
+	w0 s%%= w1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 1")
+__success __success_unpriv __retval(-1)
+__naked void smod64_non_zero_imm_1(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r0 s%%= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 2")
+__success __success_unpriv __retval(1)
+__naked void smod64_non_zero_imm_2(void)
+{
+	asm volatile ("					\
+	r0 = 41;					\
+	r0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 3")
+__success __success_unpriv __retval(-1)
+__naked void smod64_non_zero_imm_3(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 4")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_imm_4(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r0 s%%= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 5")
+__success __success_unpriv __retval(-0)
+__naked void smod64_non_zero_imm_5(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 6")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_imm_6(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r0 s%%= -2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 7")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_imm_7(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r0 s%%= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero imm divisor, check 8")
+__success __success_unpriv __retval(1)
+__naked void smod64_non_zero_imm_8(void)
+{
+	asm volatile ("					\
+	r0 = 41;					\
+	r0 s%%= 2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 1")
+__success __success_unpriv __retval(-1)
+__naked void smod64_non_zero_reg_1(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r1 = 2;						\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 2")
+__success __success_unpriv __retval(1)
+__naked void smod64_non_zero_reg_2(void)
+{
+	asm volatile ("					\
+	r0 = 41;					\
+	r1 = -2;					\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 3")
+__success __success_unpriv __retval(-1)
+__naked void smod64_non_zero_reg_3(void)
+{
+	asm volatile ("					\
+	r0 = -41;					\
+	r1 = -2;					\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 4")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_reg_4(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r1 = 2;						\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 5")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_reg_5(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r1 = -2;					\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 6")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_reg_6(void)
+{
+	asm volatile ("					\
+	r0 = -42;					\
+	r1 = -2;					\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 7")
+__success __success_unpriv __retval(0)
+__naked void smod64_non_zero_reg_7(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r1 = 2;						\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, non-zero reg divisor, check 8")
+__success __success_unpriv __retval(1)
+__naked void smod64_non_zero_reg_8(void)
+{
+	asm volatile ("					\
+	r0 = 41;					\
+	r1 = 2;						\
+	r0 s%%= r1;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV32, zero divisor")
+__success __success_unpriv __retval(0)
+__naked void sdiv32_zero_divisor(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w1 = 0;						\
+	w2 = -1;					\
+	w2 s/= w1;					\
+	w0 = w2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SDIV64, zero divisor")
+__success __success_unpriv __retval(0)
+__naked void sdiv64_zero_divisor(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r1 = 0;						\
+	r2 = -1;					\
+	r2 s/= r1;					\
+	r0 = r2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD32, zero divisor")
+__success __success_unpriv __retval(-1)
+__naked void smod32_zero_divisor(void)
+{
+	asm volatile ("					\
+	w0 = 42;					\
+	w1 = 0;						\
+	w2 = -1;					\
+	w2 s%%= w1;					\
+	w0 = w2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+SEC("socket")
+__description("SMOD64, zero divisor")
+__success __success_unpriv __retval(-1)
+__naked void smod64_zero_divisor(void)
+{
+	asm volatile ("					\
+	r0 = 42;					\
+	r1 = 0;						\
+	r2 = -1;					\
+	r2 s%%= r1;					\
+	r0 = r2;					\
+	exit;						\
+"	::: __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+	return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/verifier/basic_instr.c

···
 	.retval = 1,
 },
 {
-	"invalid 64-bit BPF_END",
+	"invalid 64-bit BPF_END with BPF_TO_BE",
 	.insns = {
 	BPF_MOV32_IMM(BPF_REG_0, 0),
 	{
-		.code  = BPF_ALU64 | BPF_END | BPF_TO_LE,
+		.code  = BPF_ALU64 | BPF_END | BPF_TO_BE,
 		.dst_reg = BPF_REG_0,
 		.src_reg = 0,
 		.off   = 0,
···
 	},
 	BPF_EXIT_INSN(),
 	},
-	.errstr = "unknown opcode d7",
+	.errstr = "unknown opcode df",
 	.result = REJECT,
 },
 {

tools/testing/selftests/bpf/xskxceiver.c

···
 
 	err = bpf_xdp_query(ifobj->ifindex, XDP_FLAGS_DRV_MODE, &query_opts);
 	if (err) {
-		ksft_print_msg("Error querrying XDP capabilities\n");
+		ksft_print_msg("Error querying XDP capabilities\n");
 		exit_with_error(-err);
 	}
 	if (query_opts.feature_flags & NETDEV_XDP_ACT_RX_SG)