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