Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_POISON_H
2#define _LINUX_POISON_H
3
4/********** include/linux/list.h **********/
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
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 */
22#define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA)
23#define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA)
24
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 *) 0x300 + POISON_POINTER_DELTA)
31
32/********** mm/debug-pagealloc.c **********/
33#define PAGE_POISON 0xaa
34
35/********** mm/page_alloc.c ************/
36
37#define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA)
38
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 */
44#define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */
45#define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */
46
47#define SLUB_RED_INACTIVE 0xbb
48#define SLUB_RED_ACTIVE 0xcc
49
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
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 **********/
65#define JBD_POISON_FREE 0x5b
66#define JBD2_POISON_FREE 0x5c
67
68/********** drivers/base/dmapool.c **********/
69#define POOL_POISON_FREED 0xa7 /* !inuse */
70#define POOL_POISON_ALLOCATED 0xa9 /* !initted */
71
72/********** drivers/atm/ **********/
73#define ATM_POISON_FREE 0x12
74#define ATM_POISON 0xdeadbeef
75
76/********** kernel/mutexes **********/
77#define MUTEX_DEBUG_INIT 0x11
78#define MUTEX_DEBUG_FREE 0x22
79
80/********** lib/flex_array.c **********/
81#define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */
82
83/********** security/ **********/
84#define KEY_DESTROY 0xbd
85
86#endif