Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c9cf5528 RD |
2 | #ifndef _LINUX_POISON_H |
3 | #define _LINUX_POISON_H | |
4 | ||
5 | /********** include/linux/list.h **********/ | |
a29815a3 AK |
6 | |
7 | /* | |
8 | * Architectures might want to move the poison pointer offset | |
9 | * into some well-recognized area such as 0xdead000000000000, | |
10 | * that is also not mappable by user-space exploits: | |
11 | */ | |
12 | #ifdef CONFIG_ILLEGAL_POINTER_VALUE | |
13 | # define POISON_POINTER_DELTA _AC(CONFIG_ILLEGAL_POINTER_VALUE, UL) | |
14 | #else | |
15 | # define POISON_POINTER_DELTA 0 | |
16 | #endif | |
17 | ||
c9cf5528 RD |
18 | /* |
19 | * These are non-NULL pointers that will result in page faults | |
20 | * under normal circumstances, used to verify that nobody uses | |
21 | * non-initialized list entries. | |
22 | */ | |
8a5e5e02 | 23 | #define LIST_POISON1 ((void *) 0x100 + POISON_POINTER_DELTA) |
4c6080cd | 24 | #define LIST_POISON2 ((void *) 0x122 + POISON_POINTER_DELTA) |
c9cf5528 | 25 | |
c6f3a97f | 26 | /********** include/linux/timer.h **********/ |
b8a0255d | 27 | #define TIMER_ENTRY_STATIC ((void *) 0x300 + POISON_POINTER_DELTA) |
c6f3a97f | 28 | |
6d2bef9d | 29 | /********** mm/page_poison.c **********/ |
6a11f75b AM |
30 | #define PAGE_POISON 0xaa |
31 | ||
1c290f64 KS |
32 | /********** mm/page_alloc.c ************/ |
33 | ||
b8a0255d | 34 | #define TAIL_MAPPING ((void *) 0x400 + POISON_POINTER_DELTA) |
1c290f64 | 35 | |
c9cf5528 RD |
36 | /********** mm/slab.c **********/ |
37 | /* | |
38 | * Magic nums for obj red zoning. | |
39 | * Placed in the first word before and the first word after an obj. | |
40 | */ | |
b46b8f19 DW |
41 | #define RED_INACTIVE 0x09F911029D74E35BULL /* when obj is inactive */ |
42 | #define RED_ACTIVE 0xD84156C5635688C0ULL /* when obj is active */ | |
c9cf5528 | 43 | |
81819f0f CL |
44 | #define SLUB_RED_INACTIVE 0xbb |
45 | #define SLUB_RED_ACTIVE 0xcc | |
46 | ||
c9cf5528 RD |
47 | /* ...and for poisoning */ |
48 | #define POISON_INUSE 0x5a /* for use-uninitialised poisoning */ | |
49 | #define POISON_FREE 0x6b /* for use-after-free poisoning */ | |
50 | #define POISON_END 0xa5 /* end-byte of poisoning */ | |
51 | ||
52 | /********** arch/$ARCH/mm/init.c **********/ | |
53 | #define POISON_FREE_INITMEM 0xcc | |
54 | ||
c9cf5528 RD |
55 | /********** arch/ia64/hp/common/sba_iommu.c **********/ |
56 | /* | |
57 | * arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a | |
58 | * value of "SBAIOMMU POISON\0" for spill-over poisoning. | |
59 | */ | |
60 | ||
61 | /********** fs/jbd/journal.c **********/ | |
cd02ff0b MC |
62 | #define JBD_POISON_FREE 0x5b |
63 | #define JBD2_POISON_FREE 0x5c | |
c9cf5528 RD |
64 | |
65 | /********** drivers/base/dmapool.c **********/ | |
66 | #define POOL_POISON_FREED 0xa7 /* !inuse */ | |
67 | #define POOL_POISON_ALLOCATED 0xa9 /* !initted */ | |
68 | ||
b3c681e0 RD |
69 | /********** drivers/atm/ **********/ |
70 | #define ATM_POISON_FREE 0x12 | |
3c6b3773 | 71 | #define ATM_POISON 0xdeadbeef |
b3c681e0 | 72 | |
a7807a32 RD |
73 | /********** kernel/mutexes **********/ |
74 | #define MUTEX_DEBUG_INIT 0x11 | |
75 | #define MUTEX_DEBUG_FREE 0x22 | |
977625a6 | 76 | #define MUTEX_POISON_WW_CTX ((void *) 0x500 + POISON_POINTER_DELTA) |
a7807a32 RD |
77 | |
78 | /********** security/ **********/ | |
79 | #define KEY_DESTROY 0xbd | |
80 | ||
c07aea3e MC |
81 | /********** net/core/page_pool.c **********/ |
82 | #define PP_SIGNATURE (0x40 + POISON_POINTER_DELTA) | |
83 | ||
9dde0cd3 JDB |
84 | /********** net/core/skbuff.c **********/ |
85 | #define SKB_LIST_POISON_NEXT ((void *)(0x800 + POISON_POINTER_DELTA)) | |
86 | ||
47e34cb7 DM |
87 | /********** kernel/bpf/ **********/ |
88 | #define BPF_PTR_POISON ((void *)(0xeB9FUL + POISON_POINTER_DELTA)) | |
89 | ||
47d58691 JH |
90 | /********** VFS **********/ |
91 | #define VFS_PTR_POISON ((void *)(0xF5 + POISON_POINTER_DELTA)) | |
92 | ||
c9cf5528 | 93 | #endif |