1c9cf5528SRandy Dunlap #ifndef _LINUX_POISON_H 2c9cf5528SRandy Dunlap #define _LINUX_POISON_H 3c9cf5528SRandy Dunlap 4c9cf5528SRandy Dunlap /********** include/linux/list.h **********/ 5a29815a3SAvi Kivity 6a29815a3SAvi Kivity /* 7a29815a3SAvi Kivity * Architectures might want to move the poison pointer offset 8a29815a3SAvi Kivity * into some well-recognized area such as 0xdead000000000000, 9a29815a3SAvi Kivity * that is also not mappable by user-space exploits: 10a29815a3SAvi Kivity */ 11a29815a3SAvi Kivity #ifdef CONFIG_ILLEGAL_POINTER_VALUE 12a29815a3SAvi Kivity # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL) 13a29815a3SAvi Kivity #else 14a29815a3SAvi Kivity # define POISON_POINTER_DELTA 0 15a29815a3SAvi Kivity #endif 16a29815a3SAvi Kivity 17c9cf5528SRandy Dunlap /* 18c9cf5528SRandy Dunlap * These are non-NULL pointers that will result in page faults 19c9cf5528SRandy Dunlap * under normal circumstances, used to verify that nobody uses 20c9cf5528SRandy Dunlap * non-initialized list entries. 21c9cf5528SRandy Dunlap */ 22*8a5e5e02SVasily Kulikov #define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA) 23*8a5e5e02SVasily Kulikov #define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA) 24c9cf5528SRandy Dunlap 25c6f3a97fSThomas Gleixner /********** include/linux/timer.h **********/ 26c6f3a97fSThomas Gleixner /* 27c6f3a97fSThomas Gleixner * Magic number "tsta" to indicate a static timer initializer 28c6f3a97fSThomas Gleixner * for the object debugging code. 29c6f3a97fSThomas Gleixner */ 30c6f3a97fSThomas Gleixner #define TIMER_ENTRY_STATIC ((void *) 0x74737461) 31c6f3a97fSThomas Gleixner 326a11f75bSAkinobu Mita /********** mm/debug-pagealloc.c **********/ 336a11f75bSAkinobu Mita #define PAGE_POISON 0xaa 346a11f75bSAkinobu Mita 35c9cf5528SRandy Dunlap /********** mm/slab.c **********/ 36c9cf5528SRandy Dunlap /* 37c9cf5528SRandy Dunlap * Magic nums for obj red zoning. 38c9cf5528SRandy Dunlap * Placed in the first word before and the first word after an obj. 39c9cf5528SRandy Dunlap */ 40b46b8f19SDavid Woodhouse #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ 41b46b8f19SDavid Woodhouse #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ 42c9cf5528SRandy Dunlap 4381819f0fSChristoph Lameter #define SLUB_RED_INACTIVE 0xbb 4481819f0fSChristoph Lameter #define SLUB_RED_ACTIVE 0xcc 4581819f0fSChristoph Lameter 46c9cf5528SRandy Dunlap /* ...and for poisoning */ 47c9cf5528SRandy Dunlap #define POISON_INUSE 0x5a /* for use-uninitialised poisoning */ 48c9cf5528SRandy Dunlap #define POISON_FREE 0x6b /* for use-after-free poisoning */ 49c9cf5528SRandy Dunlap #define POISON_END 0xa5 /* end-byte of poisoning */ 50c9cf5528SRandy Dunlap 51c9cf5528SRandy Dunlap /********** arch/$ARCH/mm/init.c **********/ 52c9cf5528SRandy Dunlap #define POISON_FREE_INITMEM 0xcc 53c9cf5528SRandy Dunlap 54c9cf5528SRandy Dunlap /********** arch/ia64/hp/common/sba_iommu.c **********/ 55c9cf5528SRandy Dunlap /* 56c9cf5528SRandy Dunlap * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a 57c9cf5528SRandy Dunlap * value of "SBAIOMMU POISON\0" for spill-over poisoning. 58c9cf5528SRandy Dunlap */ 59c9cf5528SRandy Dunlap 60c9cf5528SRandy Dunlap /********** fs/jbd/journal.c **********/ 61c9cf5528SRandy Dunlap #define JBD_POISON_FREE 0x5b 62cd02ff0bSMingming Cao #define JBD2_POISON_FREE 0x5c 63c9cf5528SRandy Dunlap 64c9cf5528SRandy Dunlap /********** drivers/base/dmapool.c **********/ 65c9cf5528SRandy Dunlap #define POOL_POISON_FREED 0xa7 /* !inuse */ 66c9cf5528SRandy Dunlap #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ 67c9cf5528SRandy Dunlap 68b3c681e0SRandy Dunlap /********** drivers/atm/ **********/ 69b3c681e0SRandy Dunlap #define ATM_POISON_FREE 0x12 703c6b3773SRandy Dunlap #define ATM_POISON 0xdeadbeef 71b3c681e0SRandy Dunlap 724bdbf6c0SRandy Dunlap /********** net/ **********/ 734bdbf6c0SRandy Dunlap #define NEIGHBOR_DEAD 0xdeadbeef 744bdbf6c0SRandy Dunlap #define NETFILTER_LINK_POISON 0xdead57ac 754bdbf6c0SRandy Dunlap 76a7807a32SRandy Dunlap /********** kernel/mutexes **********/ 77a7807a32SRandy Dunlap #define MUTEX_DEBUG_INIT 0x11 78a7807a32SRandy Dunlap #define MUTEX_DEBUG_FREE 0x22 79a7807a32SRandy Dunlap 8019da3dd1SDavid Rientjes /********** lib/flex_array.c **********/ 8119da3dd1SDavid Rientjes #define FLEX_ARRAY_FREE 0x6c /* for use-after-free poisoning */ 8219da3dd1SDavid Rientjes 83a7807a32SRandy Dunlap /********** security/ **********/ 84a7807a32SRandy Dunlap #define KEY_DESTROY 0xbd 85a7807a32SRandy Dunlap 86b3c681e0SRandy Dunlap /********** sound/oss/ **********/ 87b3c681e0SRandy Dunlap #define OSS_POISON_FREE 0xAB 88b3c681e0SRandy Dunlap 89c9cf5528SRandy Dunlap #endif 90