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  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. /********** arch/$ARCH/mm/init.c **********/
  52. #define POISON_FREE_INITMEM     0xcc
  53.  
  54. /********** arch/ia64/hp/common/sba_iommu.c **********/
  55. /*
  56.  * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
  57.  * value of "SBAIOMMU POISON\0" for spill-over poisoning.
  58.  */
  59.  
  60. /********** fs/jbd/journal.c **********/
  61. #define JBD_POISON_FREE         0x5b
  62. #define JBD2_POISON_FREE        0x5c
  63.  
  64. /********** drivers/base/dmapool.c **********/
  65. #define POOL_POISON_FREED       0xa7    /* !inuse */
  66. #define POOL_POISON_ALLOCATED   0xa9    /* !initted */
  67.  
  68. /********** drivers/atm/ **********/
  69. #define ATM_POISON_FREE         0x12
  70. #define ATM_POISON              0xdeadbeef
  71.  
  72. /********** net/ **********/
  73. #define NEIGHBOR_DEAD           0xdeadbeef
  74. #define NETFILTER_LINK_POISON   0xdead57ac
  75.  
  76. /********** kernel/mutexes **********/
  77. #define MUTEX_DEBUG_INIT        0x11
  78. #define MUTEX_DEBUG_FREE        0x22
  79.  
  80. /********** lib/flex_array.c **********/
  81. #define FLEX_ARRAY_FREE 0x6c    /* for use-after-free poisoning */
  82.  
  83. /********** security/ **********/
  84. #define KEY_DESTROY             0xbd
  85.  
  86. /********** sound/oss/ **********/
  87. #define OSS_POISON_FREE         0xAB
  88.  
  89. #endif
  90.