/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef _LINUX_POISON_H
  #define _LINUX_POISON_H
  
  /********** include/linux/list.h **********/

  
  /*
   * Architectures might want to move the poison pointer offset
   * into some well-recognized area such as 0xdead000000000000,
   * that is also not mappable by user-space exploits:
   */
  #ifdef CONFIG_ILLEGAL_POINTER_VALUE
  # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL)
  #else
  # define POISON_POINTER_DELTA 0
  #endif

  /*
   * These are non-NULL pointers that will result in page faults
   * under normal circumstances, used to verify that nobody uses
   * non-initialized list entries.
   */

  #define LIST_POISON1  ((void *) 0x100 + POISON_POINTER_DELTA)
  #define LIST_POISON2  ((void *) 0x200 + POISON_POINTER_DELTA)

  /********** include/linux/timer.h **********/
  /*
   * Magic number "tsta" to indicate a static timer initializer
   * for the object debugging code.
   */

  #define TIMER_ENTRY_STATIC	((void *) 0x300 + POISON_POINTER_DELTA)

  /********** mm/debug-pagealloc.c **********/

  #ifdef CONFIG_PAGE_POISONING_ZERO
  #define PAGE_POISON 0x00
  #else

  #define PAGE_POISON 0xaa

  #endif

  /********** mm/page_alloc.c ************/

  #define TAIL_MAPPING	((void *) 0x400 + POISON_POINTER_DELTA)

  /********** mm/slab.c **********/
  /*
   * Magic nums for obj red zoning.
   * Placed in the first word before and the first word after an obj.
   */

  #define	RED_INACTIVE	0x09F911029D74E35BULL	/* when obj is inactive */
  #define	RED_ACTIVE	0xD84156C5635688C0ULL	/* when obj is active */

  #define SLUB_RED_INACTIVE	0xbb
  #define SLUB_RED_ACTIVE		0xcc

  /* ...and for poisoning */
  #define	POISON_INUSE	0x5a	/* for use-uninitialised poisoning */
  #define POISON_FREE	0x6b	/* for use-after-free poisoning */
  #define	POISON_END	0xa5	/* end-byte of poisoning */
  
  /********** arch/$ARCH/mm/init.c **********/
  #define POISON_FREE_INITMEM	0xcc

  /********** arch/ia64/hp/common/sba_iommu.c **********/
  /*
   * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a
   * value of "SBAIOMMU POISON\0" for spill-over poisoning.
   */
  
  /********** fs/jbd/journal.c **********/

  #define JBD_POISON_FREE		0x5b
  #define JBD2_POISON_FREE	0x5c

  
  /********** drivers/base/dmapool.c **********/
  #define	POOL_POISON_FREED	0xa7	/* !inuse */
  #define	POOL_POISON_ALLOCATED	0xa9	/* !initted */

  /********** drivers/atm/ **********/
  #define ATM_POISON_FREE		0x12

  #define ATM_POISON		0xdeadbeef

  /********** kernel/mutexes **********/
  #define MUTEX_DEBUG_INIT	0x11
  #define MUTEX_DEBUG_FREE	0x22

  #define MUTEX_POISON_WW_CTX	((void *) 0x500 + POISON_POINTER_DELTA)

  /********** lib/flex_array.c **********/
  #define FLEX_ARRAY_FREE	0x6c	/* for use-after-free poisoning */

  /********** security/ **********/
  #define KEY_DESTROY		0xbd

  #endif