linux/include/linux/poison.h
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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
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