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 *) 0x00100100 + POISON_POINTER_DELTA) 23 #define LIST_POISON2 ((void *) 0x00200200 + 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 *) 0x74737461) 31 32 /********** mm/debug-pagealloc.c **********/ 33 #define PAGE_POISON 0xaa 34 35 /********** mm/slab.c **********/ 36 /* 37 * Magic nums for obj red zoning. 38 * Placed in the first word before and the first word after an obj. 39 */ 40 #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ 41 #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ 42 43 #define SLUB_RED_INACTIVE 0xbb 44 #define SLUB_RED_ACTIVE 0xcc 45 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 */ 50 51 /********** mm/hugetlb.c **********/ 52 /* 53 * Private mappings of hugetlb pages use this poisoned value for 54 * page->mapping. The core VM should not be doing anything with this mapping 55 * but futex requires the existence of some page->mapping value even though it 56 * is unused if PAGE_MAPPING_ANON is set. 57 */ 58 #define HUGETLB_POISON ((void *)(0x00300300 + POISON_POINTER_DELTA + PAGE_MAPPING_ANON)) 59 60 /********** arch/$ARCH/mm/init.c **********/ 61 #define POISON_FREE_INITMEM 0xcc 62 63 /********** arch/ia64/hp/common/sba_iommu.c **********/ 64 /* 65 * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a 66 * value of "SBAIOMMU POISON\0" for spill-over poisoning. 67 */ 68 69 /********** fs/jbd/journal.c **********/ 70 #define JBD_POISON_FREE 0x5b 71 #define JBD2_POISON_FREE 0x5c 72 73 /********** drivers/base/dmapool.c **********/ 74 #define POOL_POISON_FREED 0xa7 /* !inuse */ 75 #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ 76 77 /********** drivers/atm/ **********/ 78 #define ATM_POISON_FREE 0x12 79 #define ATM_POISON 0xdeadbeef 80 81 /********** net/ **********/ 82 #define NEIGHBOR_DEAD 0xdeadbeef 83 #define NETFILTER_LINK_POISON 0xdead57ac 84 85 /********** kernel/mutexes **********/ 86 #define MUTEX_DEBUG_INIT 0x11 87 #define MUTEX_DEBUG_FREE 0x22 88 89 /********** lib/flex_array.c **********/ 90 #define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */ 91 92 /********** security/ **********/ 93 #define KEY_DESTROY 0xbd 94 95 /********** sound/oss/ **********/ 96 #define OSS_POISON_FREE 0xAB 97 98 #endif 99
