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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_POISON_H#define _LINUX_POISON_H
/********** include/linux/list.h **********/
/* * Architectures might want to move the poison pointer offset * into some well-recognized area such as 0xdead000000000000, * that is also not mappable by user-space exploits: */#ifdef CONFIG_ILLEGAL_POINTER_VALUE# define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL)#else# define POISON_POINTER_DELTA 0#endif
/* * These are non-NULL pointers that will result in page faults * under normal circumstances, used to verify that nobody uses * non-initialized list entries. */#define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA)#define LIST_POISON2 ((void *) 0x122 + POISON_POINTER_DELTA)
/********** include/linux/timer.h **********/#define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA)
/********** mm/page_poison.c **********/#define PAGE_POISON 0xaa
/********** mm/page_alloc.c ************/
#define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA)
/********** mm/slab.c **********//* * Magic nums for obj red zoning. * Placed in the first word before and the first word after an obj. */#define SLUB_RED_INACTIVE 0xbb /* when obj is inactive */#define SLUB_RED_ACTIVE 0xcc /* when obj is active */
/* ...and for poisoning */#define POISON_INUSE 0x5a /* for use-uninitialised poisoning */#define POISON_FREE 0x6b /* for use-after-free poisoning */#define POISON_END 0xa5 /* end-byte of poisoning */
/********** arch/$ARCH/mm/init.c **********/#define POISON_FREE_INITMEM 0xcc
/********** fs/jbd/journal.c **********/#define JBD_POISON_FREE 0x5b#define JBD2_POISON_FREE 0x5c
/********** drivers/base/dmapool.c **********/#define POOL_POISON_FREED 0xa7 /* !inuse */#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
/********** drivers/atm/ **********/#define ATM_POISON_FREE 0x12#define ATM_POISON 0xdeadbeef
/********** kernel/mutexes **********/#define MUTEX_DEBUG_INIT 0x11#define MUTEX_DEBUG_FREE 0x22#define MUTEX_POISON_WW_CTX ((void *) 0x500 + POISON_POINTER_DELTA)
/********** security/ **********/#define KEY_DESTROY 0xbd
/********** net/core/page_pool.c **********//* * page_pool uses additional free bits within this value to store data, see the * definition of PP_DMA_INDEX_MASK in mm.h */#define PP_SIGNATURE (0x40 + POISON_POINTER_DELTA)
/********** net/core/skbuff.c **********/#define SKB_LIST_POISON_NEXT ((void *)(0x800 + POISON_POINTER_DELTA))/********** net/ **********/#define NET_PTR_POISON ((void *)(0x801 + POISON_POINTER_DELTA))
/********** kernel/bpf/ **********/#define BPF_PTR_POISON ((void *)(0xeB9FUL + POISON_POINTER_DELTA))
/********** VFS **********/#define VFS_PTR_POISON ((void *)(0xF5 + POISON_POINTER_DELTA))
/********** lib/stackdepot.c **********/#define STACK_DEPOT_POISON ((void *)(0xD390 + POISON_POINTER_DELTA))
/********** io_uring/ **********/#define IO_URING_PTR_POISON ((void *)(0x1091UL + POISON_POINTER_DELTA))
#endif