summaryrefslogblamecommitdiff
path: root/include/linux/poison.h
blob: 851a855d386884177eb50db59a67821168c2258d (plain) (tree) 
b24413180f56 ^

c9cf55285e87 ^




a29815a333c6 ^












c9cf55285e87 ^





8a5e5e02fc83 ^

4c6080cd6f8b ^

c9cf55285e87 ^

c6f3a97f86a5 ^

b8a0255db958 ^

c6f3a97f86a5 ^

6d2bef9df7cc ^

6a11f75b6a17 ^


1c290f642101 ^


b8a0255db958 ^

1c290f642101 ^

c9cf55285e87 ^





b46b8f19c9cd ^


c9cf55285e87 ^

81819f0fc828 ^



c9cf55285e87 ^








c9cf55285e87 ^







cd02ff0b14b7 ^


c9cf55285e87 ^





b3c681e09193 ^


3c6b37732167 ^

b3c681e09193 ^

a7807a32bbb0 ^



977625a69328 ^

a7807a32bbb0 ^




c07aea3ef4d4 ^



9dde0cd3b10f ^



47e34cb74d37 ^



47d586913f2a ^



c9cf55285e87 ^

1

2
3
4
5

6
7
8
9
10
11
12
13
14
15
16
17

18
19
20
21
22

23

24

25

26

27

28

29

30
31

32
33

34

35

36
37
38
39
40

41
42

43

44
45
46

47
48
49
50
51
52
53
54

55
56
57
58
59
60
61

62
63

64
65
66
67
68

69
70

71

72

73
74
75

76

77
78
79
80

81
82
83

84
85
86

87
88
89

90
91
92

93

                                      



                                            











                                                                   




                                                              
                                                             
                                                             
 
                                             
                                                                       
 
                                        

                        

                                         
                                                               
 




                                                                   

                                                                          
 


                                    







                                                                     






                                                                      

                                    




                                                      

                                    
                                          
 


                                      
                                                                       



                                    


                                                             


                                                                        


                                                                  


                                                              
      
/* 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 *) 0x122 + POISON_POINTER_DELTA)

/********** include/linux/timer.h **********/
#define TIMER_ENTRY_STATIC	((void *) 0x300 + POISON_POINTER_DELTA)

/********** mm/page_poison.c **********/
#define PAGE_POISON 0xaa

/********** 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)

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

/********** net/core/page_pool.c **********/
#define PP_SIGNATURE		(0x40 + POISON_POINTER_DELTA)

/********** net/core/skbuff.c **********/
#define SKB_LIST_POISON_NEXT	((void *)(0x800 + POISON_POINTER_DELTA))

/********** kernel/bpf/ **********/
#define BPF_PTR_POISON ((void *)(0xeB9FUL + POISON_POINTER_DELTA))

/********** VFS **********/
#define VFS_PTR_POISON ((void *)(0xF5 + POISON_POINTER_DELTA))

#endif