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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687/* 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
#ifdef __cplusplus#define LIST_POISON1 NULL#define LIST_POISON2 NULL#else/* * 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 *) 0x200 + POISON_POINTER_DELTA)#endif
/********** include/linux/timer.h **********//* * Magic number "tsta" to indicate a static timer initializer * for the object debugging code. */#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
/********** arch/ia64/hp/common/sba_iommu.c **********//* * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a * value of "SBAIOMMU POISON\0" for spill-over poisoning. */
/********** 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
/********** security/ **********/#define KEY_DESTROY 0xbd
#endif