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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 | #ifdef CONFIG_PAGE_POISONING_ZERO | |
34 | #define PAGE_POISON 0x00 | |
35 | #else | |
36 | #define PAGE_POISON 0xaa | |
37 | #endif | |
38 | ||
39 | /********** mm/page_alloc.c ************/ | |
40 | ||
41 | #define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA) | |
42 | ||
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 | */ | |
48 | #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ | |
49 | #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ | |
50 | ||
51 | #define SLUB_RED_INACTIVE 0xbb | |
52 | #define SLUB_RED_ACTIVE 0xcc | |
53 | ||
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 | ||
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 **********/ | |
69 | #define JBD_POISON_FREE 0x5b | |
70 | #define JBD2_POISON_FREE 0x5c | |
71 | ||
72 | /********** drivers/base/dmapool.c **********/ | |
73 | #define POOL_POISON_FREED 0xa7 /* !inuse */ | |
74 | #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ | |
75 | ||
76 | /********** drivers/atm/ **********/ | |
77 | #define ATM_POISON_FREE 0x12 | |
78 | #define ATM_POISON 0xdeadbeef | |
79 | ||
80 | /********** kernel/mutexes **********/ | |
81 | #define MUTEX_DEBUG_INIT 0x11 | |
82 | #define MUTEX_DEBUG_FREE 0x22 | |
83 | ||
84 | /********** lib/flex_array.c **********/ | |
85 | #define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */ | |
86 | ||
87 | /********** security/ **********/ | |
88 | #define KEY_DESTROY 0xbd | |
89 | ||
90 | #endif |