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Rev | Author | Line No. | Line |
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1964 | serge | 1 | #ifndef _LINUX_POISON_H |
2 | #define _LINUX_POISON_H |
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3 | |||
4 | /********** include/linux/list.h **********/ |
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5 | |||
6 | /* |
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7 | * Architectures might want to move the poison pointer offset |
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8 | * into some well-recognized area such as 0xdead000000000000, |
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9 | * that is also not mappable by user-space exploits: |
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10 | */ |
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11 | #ifdef CONFIG_ILLEGAL_POINTER_VALUE |
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12 | # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL) |
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13 | #else |
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14 | # define POISON_POINTER_DELTA 0 |
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15 | #endif |
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16 | |||
17 | /* |
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18 | * These are non-NULL pointers that will result in page faults |
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19 | * under normal circumstances, used to verify that nobody uses |
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20 | * non-initialized list entries. |
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21 | */ |
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6082 | serge | 22 | #define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA) |
23 | #define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA) |
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1964 | serge | 24 | |
25 | /********** include/linux/timer.h **********/ |
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26 | /* |
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27 | * Magic number "tsta" to indicate a static timer initializer |
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28 | * for the object debugging code. |
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29 | */ |
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6936 | serge | 30 | #define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA) |
1964 | serge | 31 | |
32 | /********** mm/debug-pagealloc.c **********/ |
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7143 | serge | 33 | #ifdef CONFIG_PAGE_POISONING_ZERO |
34 | #define PAGE_POISON 0x00 |
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35 | #else |
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1964 | serge | 36 | #define PAGE_POISON 0xaa |
7143 | serge | 37 | #endif |
1964 | serge | 38 | |
6936 | serge | 39 | /********** mm/page_alloc.c ************/ |
40 | |||
41 | #define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA) |
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42 | |||
1964 | serge | 43 | /********** mm/slab.c **********/ |
44 | /* |
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45 | * Magic nums for obj red zoning. |
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46 | * Placed in the first word before and the first word after an obj. |
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47 | */ |
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48 | #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ |
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49 | #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ |
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50 | |||
51 | #define SLUB_RED_INACTIVE 0xbb |
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52 | #define SLUB_RED_ACTIVE 0xcc |
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53 | |||
54 | /* ...and for poisoning */ |
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55 | #define POISON_INUSE 0x5a /* for use-uninitialised poisoning */ |
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56 | #define POISON_FREE 0x6b /* for use-after-free poisoning */ |
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57 | #define POISON_END 0xa5 /* end-byte of poisoning */ |
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58 | |||
59 | /********** arch/$ARCH/mm/init.c **********/ |
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60 | #define POISON_FREE_INITMEM 0xcc |
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61 | |||
62 | /********** arch/ia64/hp/common/sba_iommu.c **********/ |
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63 | /* |
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64 | * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a |
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65 | * value of "SBAIOMMU POISON\0" for spill-over poisoning. |
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66 | */ |
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67 | |||
68 | /********** fs/jbd/journal.c **********/ |
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69 | #define JBD_POISON_FREE 0x5b |
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70 | #define JBD2_POISON_FREE 0x5c |
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71 | |||
72 | /********** drivers/base/dmapool.c **********/ |
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73 | #define POOL_POISON_FREED 0xa7 /* !inuse */ |
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74 | #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ |
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75 | |||
76 | /********** drivers/atm/ **********/ |
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77 | #define ATM_POISON_FREE 0x12 |
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78 | #define ATM_POISON 0xdeadbeef |
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79 | |||
80 | /********** kernel/mutexes **********/ |
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81 | #define MUTEX_DEBUG_INIT 0x11 |
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82 | #define MUTEX_DEBUG_FREE 0x22 |
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83 | |||
84 | /********** lib/flex_array.c **********/ |
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85 | #define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */ |
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86 | |||
87 | /********** security/ **********/ |
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88 | #define KEY_DESTROY 0xbd |
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89 | |||
90 | #endif |