[linux.git] / include / linux / poison.h

#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 *) 0x00100100 + POISON_POINTER_DELTA)
#define LIST_POISON2  ((void *) 0x00200200 + POISON_POINTER_DELTA)

/********** include/linux/timer.h **********/
/*
 * Magic number "tsta" to indicate a static timer initializer
 * for the object debugging code.
 */
#define TIMER_ENTRY_STATIC	((void *) 0x74737461)

/********** mm/debug-pagealloc.c **********/
#define PAGE_POISON 0xaa

/********** mm/slab.c **********/
/*
 * Magic nums for obj red zoning.
 * Placed in the first word before and the first word after an obj.
 */
#define	RED_INACTIVE	0x09F911029D74E35BULL	/* when obj is inactive */
#define	RED_ACTIVE	0xD84156C5635688C0ULL	/* when obj is active */

#define SLUB_RED_INACTIVE	0xbb
#define SLUB_RED_ACTIVE		0xcc

/* ...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 */

/********** mm/hugetlb.c **********/
/*
 * Private mappings of hugetlb pages use this poisoned value for
 * page->mapping. The core VM should not be doing anything with this mapping
 * but futex requires the existence of some page->mapping value even though it
 * is unused if PAGE_MAPPING_ANON is set.
 */
#define HUGETLB_POISON	((void *)(0x00300300 + POISON_POINTER_DELTA + PAGE_MAPPING_ANON))

/********** 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

/********** net/ **********/
#define NEIGHBOR_DEAD		0xdeadbeef
#define NETFILTER_LINK_POISON	0xdead57ac

/********** kernel/mutexes **********/
#define MUTEX_DEBUG_INIT	0x11
#define MUTEX_DEBUG_FREE	0x22

/********** lib/flex_array.c **********/
#define FLEX_ARRAY_FREE	0x6c	/* for use-after-free poisoning */

/********** security/ **********/
#define KEY_DESTROY		0xbd

/********** sound/oss/ **********/
#define OSS_POISON_FREE		0xAB

#endif
Commit	Line	Data
c9cf5528 RD	1	#ifndef _LINUX_POISON_H
	2	#define _LINUX_POISON_H
	3
	4	/******** include/linux/list.h ********/
a29815a3 AK	5
	6	/*
	7	* Architectures might want to move the poison pointer offset
	8	* into some well-recognized area such as 0xdead000000000000,
	9	* that is also not mappable by user-space exploits:
	10	*/
	11	#ifdef CONFIG_ILLEGAL_POINTER_VALUE
	12	# define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL)
	13	#else
	14	# define POISON_POINTER_DELTA 0
	15	#endif
	16
c9cf5528 RD	17	/*
	18	* These are non-NULL pointers that will result in page faults
	19	* under normal circumstances, used to verify that nobody uses
	20	* non-initialized list entries.
	21	*/
a29815a3 AK	22	#define LIST_POISON1 ((void *) 0x00100100 + POISON_POINTER_DELTA)
a29815a3 AK	23	#define LIST_POISON2 ((void *) 0x00200200 + POISON_POINTER_DELTA)
c9cf5528	24
c6f3a97f TG	25	/******** include/linux/timer.h ********/
	26	/*
	27	* Magic number "tsta" to indicate a static timer initializer
	28	* for the object debugging code.
	29	*/
	30	#define TIMER_ENTRY_STATIC ((void *) 0x74737461)
	31
6a11f75b AM	32	/******** mm/debug-pagealloc.c ********/
	33	#define PAGE_POISON 0xaa
	34
c9cf5528 RD	35	/******** mm/slab.c ********/
	36	/*
	37	* Magic nums for obj red zoning.
	38	* Placed in the first word before and the first word after an obj.
	39	*/
b46b8f19 DW	40	#define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */
b46b8f19 DW	41	#define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */
c9cf5528	42
81819f0f CL	43	#define SLUB_RED_INACTIVE 0xbb
	44	#define SLUB_RED_ACTIVE 0xcc
	45
c9cf5528 RD	46	/* ...and for poisoning */
	47	#define POISON_INUSE 0x5a /* for use-uninitialised poisoning */
	48	#define POISON_FREE 0x6b /* for use-after-free poisoning */
	49	#define POISON_END 0xa5 /* end-byte of poisoning */
	50
23be7468 MG	51	/******** mm/hugetlb.c ********/
	52	/*
	53	* Private mappings of hugetlb pages use this poisoned value for
	54	* page->mapping. The core VM should not be doing anything with this mapping
	55	* but futex requires the existence of some page->mapping value even though it
	56	* is unused if PAGE_MAPPING_ANON is set.
	57	*/
	58	#define HUGETLB_POISON ((void *)(0x00300300 + POISON_POINTER_DELTA + PAGE_MAPPING_ANON))
	59
c9cf5528 RD	60	/******** arch/$ARCH/mm/init.c ********/
	61	#define POISON_FREE_INITMEM 0xcc
	62
c9cf5528 RD	63	/******** arch/ia64/hp/common/sba_iommu.c ********/
	64	/*
	65	* arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
	66	* value of "SBAIOMMU POISON\0" for spill-over poisoning.
	67	*/
	68
	69	/******** fs/jbd/journal.c ********/
cd02ff0b MC	70	#define JBD_POISON_FREE 0x5b
cd02ff0b MC	71	#define JBD2_POISON_FREE 0x5c
c9cf5528 RD	72
	73	/******** drivers/base/dmapool.c ********/
	74	#define POOL_POISON_FREED 0xa7 /* !inuse */
	75	#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
	76
b3c681e0 RD	77	/******** drivers/atm/ ********/
b3c681e0 RD	78	#define ATM_POISON_FREE 0x12
3c6b3773	79	#define ATM_POISON 0xdeadbeef
b3c681e0	80
4bdbf6c0 RD	81	/******** net/ ********/
	82	#define NEIGHBOR_DEAD 0xdeadbeef
	83	#define NETFILTER_LINK_POISON 0xdead57ac
	84
a7807a32 RD	85	/******** kernel/mutexes ********/
	86	#define MUTEX_DEBUG_INIT 0x11
	87	#define MUTEX_DEBUG_FREE 0x22
	88
19da3dd1 DR	89	/******** lib/flex_array.c ********/
	90	#define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */
	91
a7807a32 RD	92	/******** security/ ********/
	93	#define KEY_DESTROY 0xbd
	94
b3c681e0 RD	95	/******** sound/oss/ ********/
	96	#define OSS_POISON_FREE 0xAB
	97
c9cf5528	98	#endif