1 #ifndef _LINUX_POISON_H
2 #define _LINUX_POISON_H
4 /********** include/linux/list.h **********/
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:
11 #ifdef CONFIG_ILLEGAL_POINTER_VALUE
12 # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL)
14 # define POISON_POINTER_DELTA 0
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.
22 #define LIST_POISON1 ((void *) 0x00100100 + POISON_POINTER_DELTA)
23 #define LIST_POISON2 ((void *) 0x00200200 + POISON_POINTER_DELTA)
25 /********** include/linux/timer.h **********/
27 * Magic number "tsta" to indicate a static timer initializer
28 * for the object debugging code.
30 #define TIMER_ENTRY_STATIC ((void *) 0x74737461)
32 /********** mm/debug-pagealloc.c **********/
33 #define PAGE_POISON 0xaa
35 /********** mm/slab.c **********/
37 * Magic nums for obj red zoning.
38 * Placed in the first word before and the first word after an obj.
40 #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */
41 #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */
43 #define SLUB_RED_INACTIVE 0xbb
44 #define SLUB_RED_ACTIVE 0xcc
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 */
51 /********** arch/$ARCH/mm/init.c **********/
52 #define POISON_FREE_INITMEM 0xcc
54 /********** arch/ia64/hp/common/sba_iommu.c **********/
56 * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
57 * value of "SBAIOMMU POISON\0" for spill-over poisoning.
60 /********** fs/jbd/journal.c **********/
61 #define JBD_POISON_FREE 0x5b
62 #define JBD2_POISON_FREE 0x5c
64 /********** drivers/base/dmapool.c **********/
65 #define POOL_POISON_FREED 0xa7 /* !inuse */
66 #define POOL_POISON_ALLOCATED 0xa9 /* !initted */
68 /********** drivers/atm/ **********/
69 #define ATM_POISON_FREE 0x12
70 #define ATM_POISON 0xdeadbeef
72 /********** net/ **********/
73 #define NEIGHBOR_DEAD 0xdeadbeef
74 #define NETFILTER_LINK_POISON 0xdead57ac
76 /********** kernel/mutexes **********/
77 #define MUTEX_DEBUG_INIT 0x11
78 #define MUTEX_DEBUG_FREE 0x22
80 /********** lib/flex_array.c **********/
81 #define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */
83 /********** security/ **********/
84 #define KEY_DESTROY 0xbd
86 /********** sound/oss/ **********/
87 #define OSS_POISON_FREE 0xAB