selftests/bpf: Migrate LOAD_REJECT test cases to prog_tests

Move LOAD_REJECT test cases from test_sock.c to an equivalent set of
verifier tests in progs/verifier_sock.c.

Signed-off-by: Jordan Rife <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Martin KaFai Lau <[e-mail]>

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

···
 	: __clobber_all);
 }
 
+SEC("cgroup/post_bind4")
+__description("sk->src_ip6[0] [load 1st byte]")
+__failure __msg("invalid bpf_context access off=28 size=2")
+__naked void post_bind4_read_src_ip6(void)
+{
+	asm volatile ("					\
+	r6 = r1;					\
+	r7 = *(u16*)(r6 + %[bpf_sock_src_ip6_0]);	\
+	r0 = 1;						\
+	exit;						\
+"	:
+	: __imm_const(bpf_sock_src_ip6_0, offsetof(struct bpf_sock, src_ip6[0]))
+	: __clobber_all);
+}
+
+SEC("cgroup/post_bind4")
+__description("sk->mark [load mark]")
+__failure __msg("invalid bpf_context access off=16 size=2")
+__naked void post_bind4_read_mark(void)
+{
+	asm volatile ("					\
+	r6 = r1;					\
+	r7 = *(u16*)(r6 + %[bpf_sock_mark]);		\
+	r0 = 1;						\
+	exit;						\
+"	:
+	: __imm_const(bpf_sock_mark, offsetof(struct bpf_sock, mark))
+	: __clobber_all);
+}
+
+SEC("cgroup/post_bind6")
+__description("sk->src_ip4 [load src_ip4]")
+__failure __msg("invalid bpf_context access off=24 size=2")
+__naked void post_bind6_read_src_ip4(void)
+{
+	asm volatile ("					\
+	r6 = r1;					\
+	r7 = *(u16*)(r6 + %[bpf_sock_src_ip4]);		\
+	r0 = 1;						\
+	exit;						\
+"	:
+	: __imm_const(bpf_sock_src_ip4, offsetof(struct bpf_sock, src_ip4))
+	: __clobber_all);
+}
+
+SEC("cgroup/sock_create")
+__description("sk->src_port [word load]")
+__failure __msg("invalid bpf_context access off=44 size=2")
+__naked void sock_create_read_src_port(void)
+{
+	asm volatile ("					\
+	r6 = r1;					\
+	r7 = *(u16*)(r6 + %[bpf_sock_src_port]);	\
+	r0 = 1;						\
+	exit;						\
+"	:
+	: __imm_const(bpf_sock_src_port, offsetof(struct bpf_sock, src_port))
+	: __clobber_all);
+}
+
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/test_sock.c

···
 
 static struct sock_test tests[] = {
 	{
-		.descr = "bind4 load with invalid access: src_ip6",
-		.insns = {
-			BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
-			BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
-				    offsetof(struct bpf_sock, src_ip6[0])),
-			BPF_MOV64_IMM(BPF_REG_0, 1),
-			BPF_EXIT_INSN(),
-		},
-		.expected_attach_type = BPF_CGROUP_INET4_POST_BIND,
-		.attach_type = BPF_CGROUP_INET4_POST_BIND,
-		.result = LOAD_REJECT,
-	},
-	{
-		.descr = "bind4 load with invalid access: mark",
-		.insns = {
-			BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
-			BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
-				    offsetof(struct bpf_sock, mark)),
-			BPF_MOV64_IMM(BPF_REG_0, 1),
-			BPF_EXIT_INSN(),
-		},
-		.expected_attach_type = BPF_CGROUP_INET4_POST_BIND,
-		.attach_type = BPF_CGROUP_INET4_POST_BIND,
-		.result = LOAD_REJECT,
-	},
-	{
-		.descr = "bind6 load with invalid access: src_ip4",
-		.insns = {
-			BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
-			BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
-				    offsetof(struct bpf_sock, src_ip4)),
-			BPF_MOV64_IMM(BPF_REG_0, 1),
-			BPF_EXIT_INSN(),
-		},
-		.expected_attach_type = BPF_CGROUP_INET6_POST_BIND,
-		.attach_type = BPF_CGROUP_INET6_POST_BIND,
-		.result = LOAD_REJECT,
-	},
-	{
-		.descr = "sock_create load with invalid access: src_port",
-		.insns = {
-			BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
-			BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
-				    offsetof(struct bpf_sock, src_port)),
-			BPF_MOV64_IMM(BPF_REG_0, 1),
-			BPF_EXIT_INSN(),
-		},
-		.expected_attach_type = BPF_CGROUP_INET_SOCK_CREATE,
-		.attach_type = BPF_CGROUP_INET_SOCK_CREATE,
-		.result = LOAD_REJECT,
-	},
-	{
 		.descr = "sock_create load w/o expected_attach_type (compat mode)",
 		.insns = {
 			BPF_MOV64_IMM(BPF_REG_0, 1),