Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0b24becc AR |
2 | #ifndef __MM_KASAN_KASAN_H |
3 | #define __MM_KASAN_KASAN_H | |
4 | ||
5 | #include <linux/kasan.h> | |
cd11016e | 6 | #include <linux/stackdepot.h> |
0b24becc AR |
7 | |
8 | #define KASAN_SHADOW_SCALE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT) | |
9 | #define KASAN_SHADOW_MASK (KASAN_SHADOW_SCALE_SIZE - 1) | |
10 | ||
0316bec2 AR |
11 | #define KASAN_FREE_PAGE 0xFF /* page was freed */ |
12 | #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */ | |
13 | #define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */ | |
14 | #define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */ | |
bebf56a1 | 15 | #define KASAN_GLOBAL_REDZONE 0xFA /* redzone for global variable */ |
0316bec2 | 16 | |
c420f167 AR |
17 | /* |
18 | * Stack redzone shadow values | |
19 | * (Those are compiler's ABI, don't change them) | |
20 | */ | |
21 | #define KASAN_STACK_LEFT 0xF1 | |
22 | #define KASAN_STACK_MID 0xF2 | |
23 | #define KASAN_STACK_RIGHT 0xF3 | |
24 | #define KASAN_STACK_PARTIAL 0xF4 | |
828347f8 | 25 | #define KASAN_USE_AFTER_SCOPE 0xF8 |
c420f167 | 26 | |
bebf56a1 AR |
27 | /* Don't break randconfig/all*config builds */ |
28 | #ifndef KASAN_ABI_VERSION | |
29 | #define KASAN_ABI_VERSION 1 | |
30 | #endif | |
b8c73fc2 | 31 | |
0b24becc AR |
32 | struct kasan_access_info { |
33 | const void *access_addr; | |
34 | const void *first_bad_addr; | |
35 | size_t access_size; | |
36 | bool is_write; | |
37 | unsigned long ip; | |
38 | }; | |
39 | ||
bebf56a1 AR |
40 | /* The layout of struct dictated by compiler */ |
41 | struct kasan_source_location { | |
42 | const char *filename; | |
43 | int line_no; | |
44 | int column_no; | |
45 | }; | |
46 | ||
47 | /* The layout of struct dictated by compiler */ | |
48 | struct kasan_global { | |
49 | const void *beg; /* Address of the beginning of the global variable. */ | |
50 | size_t size; /* Size of the global variable. */ | |
51 | size_t size_with_redzone; /* Size of the variable + size of the red zone. 32 bytes aligned */ | |
52 | const void *name; | |
53 | const void *module_name; /* Name of the module where the global variable is declared. */ | |
54 | unsigned long has_dynamic_init; /* This needed for C++ */ | |
55 | #if KASAN_ABI_VERSION >= 4 | |
56 | struct kasan_source_location *location; | |
57 | #endif | |
045d599a DV |
58 | #if KASAN_ABI_VERSION >= 5 |
59 | char *odr_indicator; | |
60 | #endif | |
bebf56a1 AR |
61 | }; |
62 | ||
7ed2f9e6 AP |
63 | /** |
64 | * Structures to keep alloc and free tracks * | |
65 | */ | |
66 | ||
cd11016e AP |
67 | #define KASAN_STACK_DEPTH 64 |
68 | ||
7ed2f9e6 | 69 | struct kasan_track { |
cd11016e AP |
70 | u32 pid; |
71 | depot_stack_handle_t stack; | |
7ed2f9e6 AP |
72 | }; |
73 | ||
74 | struct kasan_alloc_meta { | |
b3cbd9bf AR |
75 | struct kasan_track alloc_track; |
76 | struct kasan_track free_track; | |
7ed2f9e6 AP |
77 | }; |
78 | ||
55834c59 AP |
79 | struct qlist_node { |
80 | struct qlist_node *next; | |
81 | }; | |
7ed2f9e6 | 82 | struct kasan_free_meta { |
55834c59 AP |
83 | /* This field is used while the object is in the quarantine. |
84 | * Otherwise it might be used for the allocator freelist. | |
85 | */ | |
86 | struct qlist_node quarantine_link; | |
7ed2f9e6 AP |
87 | }; |
88 | ||
89 | struct kasan_alloc_meta *get_alloc_info(struct kmem_cache *cache, | |
90 | const void *object); | |
91 | struct kasan_free_meta *get_free_info(struct kmem_cache *cache, | |
92 | const void *object); | |
93 | ||
0b24becc AR |
94 | static inline const void *kasan_shadow_to_mem(const void *shadow_addr) |
95 | { | |
96 | return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET) | |
97 | << KASAN_SHADOW_SCALE_SHIFT); | |
98 | } | |
99 | ||
0b24becc AR |
100 | void kasan_report(unsigned long addr, size_t size, |
101 | bool is_write, unsigned long ip); | |
7e088978 | 102 | void kasan_report_double_free(struct kmem_cache *cache, void *object, |
5ab6d91a | 103 | void *ip); |
0b24becc | 104 | |
80a9201a | 105 | #if defined(CONFIG_SLAB) || defined(CONFIG_SLUB) |
55834c59 AP |
106 | void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache); |
107 | void quarantine_reduce(void); | |
108 | void quarantine_remove_cache(struct kmem_cache *cache); | |
109 | #else | |
110 | static inline void quarantine_put(struct kasan_free_meta *info, | |
111 | struct kmem_cache *cache) { } | |
112 | static inline void quarantine_reduce(void) { } | |
113 | static inline void quarantine_remove_cache(struct kmem_cache *cache) { } | |
114 | #endif | |
115 | ||
0b24becc | 116 | #endif |