1 /* SPDX-License-Identifier: GPL-2.0 */ 1 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 9 * into some well-recognized area such as 0xde 10 * that is also not mappable by user-space exp 11 */ 12 #ifdef CONFIG_ILLEGAL_POINTER_VALUE 13 # define POISON_POINTER_DELTA _AC(CONFIG_ILLEG 14 #else 15 # define POISON_POINTER_DELTA 0 16 #endif 17 18 #ifdef __cplusplus 19 #define LIST_POISON1 NULL 20 #define LIST_POISON2 NULL 21 #else 22 /* 23 * These are non-NULL pointers that will resul 24 * under normal circumstances, used to verify 25 * non-initialized list entries. 26 */ 27 #define LIST_POISON1 ((void *) 0x100 + POISON 28 #define LIST_POISON2 ((void *) 0x200 + POISON 29 #endif 30 31 /********** include/linux/timer.h **********/ 32 /* 33 * Magic number "tsta" to indicate a static ti 34 * for the object debugging code. 35 */ 36 #define TIMER_ENTRY_STATIC ((void *) 0x30 37 38 /********** mm/page_poison.c **********/ 39 #define PAGE_POISON 0xaa 40 41 /********** mm/page_alloc.c ************/ 42 43 #define TAIL_MAPPING ((void *) 0x400 + POIS 44 45 /********** mm/slab.c **********/ 46 /* 47 * Magic nums for obj red zoning. 48 * Placed in the first word before and the fir 49 */ 50 #define SLUB_RED_INACTIVE 0xbb /* whe 51 #define SLUB_RED_ACTIVE 0xcc /* whe 52 53 /* ...and for poisoning */ 54 #define POISON_INUSE 0x5a /* for use-uni 55 #define POISON_FREE 0x6b /* for use-aft 56 #define POISON_END 0xa5 /* end-byte of 57 58 /********** arch/$ARCH/mm/init.c **********/ 59 #define POISON_FREE_INITMEM 0xcc 60 61 /********** arch/ia64/hp/common/sba_iommu.c ** 62 /* 63 * arch/ia64/hp/common/sba_iommu.c uses a 16-b 64 * value of "SBAIOMMU POISON\0" for spill-over 65 */ 66 67 /********** fs/jbd/journal.c **********/ 68 #define JBD_POISON_FREE 0x5b 69 #define JBD2_POISON_FREE 0x5c 70 71 /********** drivers/base/dmapool.c **********/ 72 #define POOL_POISON_FREED 0xa7 /* !in 73 #define POOL_POISON_ALLOCATED 0xa9 /* !in 74 75 /********** drivers/atm/ **********/ 76 #define ATM_POISON_FREE 0x12 77 #define ATM_POISON 0xdeadbeef 78 79 /********** kernel/mutexes **********/ 80 #define MUTEX_DEBUG_INIT 0x11 81 #define MUTEX_DEBUG_FREE 0x22 82 83 /********** security/ **********/ 84 #define KEY_DESTROY 0xbd 85 86 #endif 87
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