projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ae3c14a0 ACM |
2 | #ifndef _LINUX_POISON_H |
| 3 | #define _LINUX_POISON_H | |
| 4 | ||
| 5 | /********** include/linux/list.h **********/ | |
| 6 | ||
| 7 | /* | |
| 8 | * Architectures might want to move the poison pointer offset | |
| 9 | * into some well-recognized area such as 0xdead000000000000, | |
| 10 | * that is also not mappable by user-space exploits: | |
| 11 | */ | |
| 12 | #ifdef CONFIG_ILLEGAL_POINTER_VALUE | |
| 13 | # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL) | |
| 14 | #else | |
| 15 | # define POISON_POINTER_DELTA 0 | |
| 16 | #endif | |
| 17 | ||
| 6ae8eefc ACM |
18 | #ifdef __cplusplus |
| 19 | #define LIST_POISON1 NULL | |
| 20 | #define LIST_POISON2 NULL | |
| 21 | #else | |
| ae3c14a0 ACM |
22 | /* |
| 23 | * These are non-NULL pointers that will result in page faults | |
| 24 | * under normal circumstances, used to verify that nobody uses | |
| 25 | * non-initialized list entries. | |
| 26 | */ | |
| 27 | #define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA) | |
| 28 | #define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA) | |
| 6ae8eefc | 29 | #endif |
| ae3c14a0 ACM |
30 | |
| 31 | /********** include/linux/timer.h **********/ | |
| 32 | /* | |
| 33 | * Magic number "tsta" to indicate a static timer initializer | |
| 34 | * for the object debugging code. | |
| 35 | */ | |
| 36 | #define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA) | |
| 37 | ||
| f289041e | 38 | /********** mm/page_poison.c **********/ |
| ae3c14a0 | 39 | #define PAGE_POISON 0xaa |
| ae3c14a0 ACM |
40 | |
| 41 | /********** mm/page_alloc.c ************/ | |
| 42 | ||
| 43 | #define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA) | |
| 44 | ||
| 45 | /********** mm/slab.c **********/ | |
| 46 | /* | |
| 47 | * Magic nums for obj red zoning. | |
| 48 | * Placed in the first word before and the first word after an obj. | |
| 49 | */ | |
| 50 | #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ | |
| 51 | #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ | |
| 52 | ||
| 53 | #define SLUB_RED_INACTIVE 0xbb | |
| 54 | #define SLUB_RED_ACTIVE 0xcc | |
| 55 | ||
| 56 | /* ...and for poisoning */ | |
| 57 | #define POISON_INUSE 0x5a /* for use-uninitialised poisoning */ | |
| 58 | #define POISON_FREE 0x6b /* for use-after-free poisoning */ | |
| 59 | #define POISON_END 0xa5 /* end-byte of poisoning */ | |
| 60 | ||
| 61 | /********** arch/$ARCH/mm/init.c **********/ | |
| 62 | #define POISON_FREE_INITMEM 0xcc | |
| 63 | ||
| 64 | /********** arch/ia64/hp/common/sba_iommu.c **********/ | |
| 65 | /* | |
| 66 | * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a | |
| 67 | * value of "SBAIOMMU POISON\0" for spill-over poisoning. | |
| 68 | */ | |
| 69 | ||
| 70 | /********** fs/jbd/journal.c **********/ | |
| 71 | #define JBD_POISON_FREE 0x5b | |
| 72 | #define JBD2_POISON_FREE 0x5c | |
| 73 | ||
| 74 | /********** drivers/base/dmapool.c **********/ | |
| 75 | #define POOL_POISON_FREED 0xa7 /* !inuse */ | |
| 76 | #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ | |
| 77 | ||
| 78 | /********** drivers/atm/ **********/ | |
| 79 | #define ATM_POISON_FREE 0x12 | |
| 80 | #define ATM_POISON 0xdeadbeef | |
| 81 | ||
| 82 | /********** kernel/mutexes **********/ | |
| 83 | #define MUTEX_DEBUG_INIT 0x11 | |
| 84 | #define MUTEX_DEBUG_FREE 0x22 | |
| 85 | ||
| ae3c14a0 ACM |
86 | /********** security/ **********/ |
| 87 | #define KEY_DESTROY 0xbd | |
| 88 | ||
| 89 | #endif |