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gerrit-public.fairphone.software / kernel / msm-4.9 / fedbb6b4ff341c1e2120f4ffbf367fd78ac3e8f3 / . / include / linux / poison.h
blob: 51334edec506815a70868dd451d5c72944ed0a59 [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 **********/
Laura Abbott1414c7f2016-03-15 14:56:30 -0700[diff] [blame]33#ifdef CONFIG_PAGE_POISONING_ZERO
34#define PAGE_POISON 0x00
35#else
Akinobu Mita6a11f752009-03-31 15:23:17 -0700[diff] [blame]36#define PAGE_POISON 0xaa
Laura Abbott1414c7f2016-03-15 14:56:30 -0700[diff] [blame]37#endif
Akinobu Mita6a11f752009-03-31 15:23:17 -0700[diff] [blame]38
Kirill A. Shutemov1c290f62016-01-15 16:52:07 -0800[diff] [blame]39/********** mm/page_alloc.c ************/
40
Vasily Kulikovb8a02552016-01-15 16:57:55 -0800[diff] [blame]41#define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA)
Kirill A. Shutemov1c290f62016-01-15 16:52:07 -0800[diff] [blame]42
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]43/********** mm/slab.c **********/
44/*
45 * Magic nums for obj red zoning.
46 * Placed in the first word before and the first word after an obj.
47 */
David Woodhouseb46b8f12007-05-08 00:22:59 -0700[diff] [blame]48#define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */
49#define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]50
Christoph Lameter81819f02007-05-06 14:49:36 -0700[diff] [blame]51#define SLUB_RED_INACTIVE 0xbb
52#define SLUB_RED_ACTIVE 0xcc
53
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]54/* ...and for poisoning */
55#define POISON_INUSE 0x5a /* for use-uninitialised poisoning */
56#define POISON_FREE 0x6b /* for use-after-free poisoning */
57#define POISON_END 0xa5 /* end-byte of poisoning */
58
59/********** arch/$ARCH/mm/init.c **********/
60#define POISON_FREE_INITMEM 0xcc
61
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]62/********** arch/ia64/hp/common/sba_iommu.c **********/
63/*
64 * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
65 * value of "SBAIOMMU POISON\0" for spill-over poisoning.
66 */
67
68/********** fs/jbd/journal.c **********/
Mingming Caocd02ff02007-10-16 18:38:25 -0400[diff] [blame]69#define JBD_POISON_FREE 0x5b
70#define JBD2_POISON_FREE 0x5c
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]71
72/********** drivers/base/dmapool.c **********/
73#define POOL_POISON_FREED 0xa7 /* !inuse */
74#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
75
Randy Dunlapb3c681e2006-06-27 02:53:53 -0700[diff] [blame]76/********** drivers/atm/ **********/
77#define ATM_POISON_FREE 0x12
Randy Dunlap3c6b3772006-07-03 19:48:25 -0700[diff] [blame]78#define ATM_POISON 0xdeadbeef
Randy Dunlapb3c681e2006-06-27 02:53:53 -0700[diff] [blame]79
Randy Dunlapa7807a32006-06-27 02:53:54 -0700[diff] [blame]80/********** kernel/mutexes **********/
81#define MUTEX_DEBUG_INIT 0x11
82#define MUTEX_DEBUG_FREE 0x22
83
David Rientjes19da3dd2009-09-21 17:04:31 -0700[diff] [blame]84/********** lib/flex_array.c **********/
85#define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */
86
Randy Dunlapa7807a32006-06-27 02:53:54 -0700[diff] [blame]87/********** security/ **********/
88#define KEY_DESTROY 0xbd
89
Randy Dunlapc9cf5522006-06-27 02:53:52 -0700[diff] [blame]90#endif