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gerrit-public.fairphone.software / kernel / msm-4.9 / 4ece44af733ff63a7cd12aaa8c85afb6d9fdc664 / . / include / linux / poison.h
blob: 4a27153574e2839546fb40ee8e8afea483e33cef [file] [log] [blame]
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]1#ifndef _LINUX_POISON_H
2#define _LINUX_POISON_H
3
4/********** include/linux/list.h **********/
Avi Kivitya29815a2010-01-10 16:28:09 +0200[diff] [blame]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
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]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 */
Vasily Kulikov8a5e5e02015-09-09 15:36:00 -0700[diff] [blame]22#define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA)
23#define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA)
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]24
Thomas Gleixnerc6f3a972008-04-30 00:55:03 -0700[diff] [blame]25/********** include/linux/timer.h **********/
26/*
27 * Magic number "tsta" to indicate a static timer initializer
28 * for the object debugging code.
29 */
Vasily Kulikovb8a02552016-01-15 16:57:55 -0800[diff] [blame]30#define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA)
Thomas Gleixnerc6f3a972008-04-30 00:55:03 -0700[diff] [blame]31
Akinobu Mita6a11f752009-03-31 15:23:17 -0700[diff] [blame]32/********** mm/debug-pagealloc.c **********/
33#define PAGE_POISON 0xaa
34
Kirill A. Shutemov1c290f62016-01-15 16:52:07 -0800[diff] [blame]35/********** mm/page_alloc.c ************/
36
Vasily Kulikovb8a02552016-01-15 16:57:55 -0800[diff] [blame]37#define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA)
Kirill A. Shutemov1c290f62016-01-15 16:52:07 -0800[diff] [blame]38
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]39/********** mm/slab.c **********/
40/*
41 * Magic nums for obj red zoning.
42 * Placed in the first word before and the first word after an obj.
43 */
David Woodhouseb46b8f12007-05-08 00:22:59 -0700[diff] [blame]44#define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */
45#define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]46
Christoph Lameter81819f02007-05-06 14:49:36 -0700[diff] [blame]47#define SLUB_RED_INACTIVE 0xbb
48#define SLUB_RED_ACTIVE 0xcc
49
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]50/* ...and for poisoning */
51#define POISON_INUSE 0x5a /* for use-uninitialised poisoning */
52#define POISON_FREE 0x6b /* for use-after-free poisoning */
53#define POISON_END 0xa5 /* end-byte of poisoning */
54
55/********** arch/$ARCH/mm/init.c **********/
56#define POISON_FREE_INITMEM 0xcc
57
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]58/********** arch/ia64/hp/common/sba_iommu.c **********/
59/*
60 * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
61 * value of "SBAIOMMU POISON\0" for spill-over poisoning.
62 */
63
64/********** fs/jbd/journal.c **********/
Mingming Caocd02ff02007-10-16 18:38:25 -0400[diff] [blame]65#define JBD_POISON_FREE 0x5b
66#define JBD2_POISON_FREE 0x5c
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]67
68/********** drivers/base/dmapool.c **********/
69#define POOL_POISON_FREED 0xa7 /* !inuse */
70#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
71
Randy Dunlapb3c681e2006-06-27 02:53:53 -0700[diff] [blame]72/********** drivers/atm/ **********/
73#define ATM_POISON_FREE 0x12
Randy Dunlap3c6b3772006-07-03 19:48:25 -0700[diff] [blame]74#define ATM_POISON 0xdeadbeef
Randy Dunlapb3c681e2006-06-27 02:53:53 -0700[diff] [blame]75
Randy Dunlapa7807a32006-06-27 02:53:54 -0700[diff] [blame]76/********** kernel/mutexes **********/
77#define MUTEX_DEBUG_INIT 0x11
78#define MUTEX_DEBUG_FREE 0x22
79
David Rientjes19da3dd2009-09-21 17:04:31 -0700[diff] [blame]80/********** lib/flex_array.c **********/
81#define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */
82
Randy Dunlapa7807a32006-06-27 02:53:54 -0700[diff] [blame]83/********** security/ **********/
84#define KEY_DESTROY 0xbd
85
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]86#endif