cregit-Linux how code gets into the kernel

Release 4.12 include/linux/poison.h

Directory: include/linux
#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

Overall Contributors

PersonTokensPropCommitsCommitProp
Randy Dunlap8856.05%425.00%
Avi Kivity1610.19%16.25%
Laura Abbott117.01%16.25%
Christoph Lameter85.10%16.25%
David Rientjes63.82%16.25%
Akinobu Mita53.18%16.25%
Thomas Gleixner53.18%16.25%
Mingming Cao42.55%16.25%
Vasiliy Kulikov42.55%212.50%
Nicolai Hähnle42.55%16.25%
Kirill A. Shutemov42.55%16.25%
David Woodhouse21.27%16.25%
Total157100.00%16100.00%
Directory: include/linux
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