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 #define MUTEX_POISON_WW_CTX ((void *) 0x500 + POISON_POINTER_DELTA) 84 85 /********** lib/flex_array.c **********/ 86 #define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */ 87 88 /********** security/ **********/ 89 #define KEY_DESTROY 0xbd 90 91 #endif 92