include/linux/poison.h

   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