1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2ae3c14a0SArnaldo Carvalho de Melo #ifndef _LINUX_POISON_H 3ae3c14a0SArnaldo Carvalho de Melo #define _LINUX_POISON_H 4ae3c14a0SArnaldo Carvalho de Melo 5ae3c14a0SArnaldo Carvalho de Melo /********** include/linux/list.h **********/ 6ae3c14a0SArnaldo Carvalho de Melo 7ae3c14a0SArnaldo Carvalho de Melo /* 8ae3c14a0SArnaldo Carvalho de Melo * Architectures might want to move the poison pointer offset 9ae3c14a0SArnaldo Carvalho de Melo * into some well-recognized area such as 0xdead000000000000, 10ae3c14a0SArnaldo Carvalho de Melo * that is also not mappable by user-space exploits: 11ae3c14a0SArnaldo Carvalho de Melo */ 12ae3c14a0SArnaldo Carvalho de Melo #ifdef CONFIG_ILLEGAL_POINTER_VALUE 13ae3c14a0SArnaldo Carvalho de Melo # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL) 14ae3c14a0SArnaldo Carvalho de Melo #else 15ae3c14a0SArnaldo Carvalho de Melo # define POISON_POINTER_DELTA 0 16ae3c14a0SArnaldo Carvalho de Melo #endif 17ae3c14a0SArnaldo Carvalho de Melo 186ae8eefcSArnaldo Carvalho de Melo #ifdef __cplusplus 196ae8eefcSArnaldo Carvalho de Melo #define LIST_POISON1 NULL 206ae8eefcSArnaldo Carvalho de Melo #define LIST_POISON2 NULL 216ae8eefcSArnaldo Carvalho de Melo #else 22ae3c14a0SArnaldo Carvalho de Melo /* 23ae3c14a0SArnaldo Carvalho de Melo * These are non-NULL pointers that will result in page faults 24ae3c14a0SArnaldo Carvalho de Melo * under normal circumstances, used to verify that nobody uses 25ae3c14a0SArnaldo Carvalho de Melo * non-initialized list entries. 26ae3c14a0SArnaldo Carvalho de Melo */ 27ae3c14a0SArnaldo Carvalho de Melo #define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA) 28ae3c14a0SArnaldo Carvalho de Melo #define LIST_POISON2 ((void *) 0x200 + POISON_POINTER_DELTA) 296ae8eefcSArnaldo Carvalho de Melo #endif 30ae3c14a0SArnaldo Carvalho de Melo 31ae3c14a0SArnaldo Carvalho de Melo /********** include/linux/timer.h **********/ 32ae3c14a0SArnaldo Carvalho de Melo /* 33ae3c14a0SArnaldo Carvalho de Melo * Magic number "tsta" to indicate a static timer initializer 34ae3c14a0SArnaldo Carvalho de Melo * for the object debugging code. 35ae3c14a0SArnaldo Carvalho de Melo */ 36ae3c14a0SArnaldo Carvalho de Melo #define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA) 37ae3c14a0SArnaldo Carvalho de Melo 38*f289041eSVlastimil Babka /********** mm/page_poison.c **********/ 39ae3c14a0SArnaldo Carvalho de Melo #define PAGE_POISON 0xaa 40ae3c14a0SArnaldo Carvalho de Melo 41ae3c14a0SArnaldo Carvalho de Melo /********** mm/page_alloc.c ************/ 42ae3c14a0SArnaldo Carvalho de Melo 43ae3c14a0SArnaldo Carvalho de Melo #define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA) 44ae3c14a0SArnaldo Carvalho de Melo 45ae3c14a0SArnaldo Carvalho de Melo /********** mm/slab.c **********/ 46ae3c14a0SArnaldo Carvalho de Melo /* 47ae3c14a0SArnaldo Carvalho de Melo * Magic nums for obj red zoning. 48ae3c14a0SArnaldo Carvalho de Melo * Placed in the first word before and the first word after an obj. 49ae3c14a0SArnaldo Carvalho de Melo */ 50ae3c14a0SArnaldo Carvalho de Melo #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ 51ae3c14a0SArnaldo Carvalho de Melo #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ 52ae3c14a0SArnaldo Carvalho de Melo 53ae3c14a0SArnaldo Carvalho de Melo #define SLUB_RED_INACTIVE 0xbb 54ae3c14a0SArnaldo Carvalho de Melo #define SLUB_RED_ACTIVE 0xcc 55ae3c14a0SArnaldo Carvalho de Melo 56ae3c14a0SArnaldo Carvalho de Melo /* ...and for poisoning */ 57ae3c14a0SArnaldo Carvalho de Melo #define POISON_INUSE 0x5a /* for use-uninitialised poisoning */ 58ae3c14a0SArnaldo Carvalho de Melo #define POISON_FREE 0x6b /* for use-after-free poisoning */ 59ae3c14a0SArnaldo Carvalho de Melo #define POISON_END 0xa5 /* end-byte of poisoning */ 60ae3c14a0SArnaldo Carvalho de Melo 61ae3c14a0SArnaldo Carvalho de Melo /********** arch/$ARCH/mm/init.c **********/ 62ae3c14a0SArnaldo Carvalho de Melo #define POISON_FREE_INITMEM 0xcc 63ae3c14a0SArnaldo Carvalho de Melo 64ae3c14a0SArnaldo Carvalho de Melo /********** arch/ia64/hp/common/sba_iommu.c **********/ 65ae3c14a0SArnaldo Carvalho de Melo /* 66ae3c14a0SArnaldo Carvalho de Melo * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a 67ae3c14a0SArnaldo Carvalho de Melo * value of "SBAIOMMU POISON\0" for spill-over poisoning. 68ae3c14a0SArnaldo Carvalho de Melo */ 69ae3c14a0SArnaldo Carvalho de Melo 70ae3c14a0SArnaldo Carvalho de Melo /********** fs/jbd/journal.c **********/ 71ae3c14a0SArnaldo Carvalho de Melo #define JBD_POISON_FREE 0x5b 72ae3c14a0SArnaldo Carvalho de Melo #define JBD2_POISON_FREE 0x5c 73ae3c14a0SArnaldo Carvalho de Melo 74ae3c14a0SArnaldo Carvalho de Melo /********** drivers/base/dmapool.c **********/ 75ae3c14a0SArnaldo Carvalho de Melo #define POOL_POISON_FREED 0xa7 /* !inuse */ 76ae3c14a0SArnaldo Carvalho de Melo #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ 77ae3c14a0SArnaldo Carvalho de Melo 78ae3c14a0SArnaldo Carvalho de Melo /********** drivers/atm/ **********/ 79ae3c14a0SArnaldo Carvalho de Melo #define ATM_POISON_FREE 0x12 80ae3c14a0SArnaldo Carvalho de Melo #define ATM_POISON 0xdeadbeef 81ae3c14a0SArnaldo Carvalho de Melo 82ae3c14a0SArnaldo Carvalho de Melo /********** kernel/mutexes **********/ 83ae3c14a0SArnaldo Carvalho de Melo #define MUTEX_DEBUG_INIT 0x11 84ae3c14a0SArnaldo Carvalho de Melo #define MUTEX_DEBUG_FREE 0x22 85ae3c14a0SArnaldo Carvalho de Melo 86ae3c14a0SArnaldo Carvalho de Melo /********** security/ **********/ 87ae3c14a0SArnaldo Carvalho de Melo #define KEY_DESTROY 0xbd 88ae3c14a0SArnaldo Carvalho de Melo 89ae3c14a0SArnaldo Carvalho de Melo #endif 90