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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 | |
342061ee PL |
27 | /* |
28 | * alloca redzone shadow values | |
29 | */ | |
30 | #define KASAN_ALLOCA_LEFT 0xCA | |
31 | #define KASAN_ALLOCA_RIGHT 0xCB | |
32 | ||
33 | #define KASAN_ALLOCA_REDZONE_SIZE 32 | |
34 | ||
bebf56a1 AR |
35 | /* Don't break randconfig/all*config builds */ |
36 | #ifndef KASAN_ABI_VERSION | |
37 | #define KASAN_ABI_VERSION 1 | |
38 | #endif | |
b8c73fc2 | 39 | |
0b24becc AR |
40 | struct kasan_access_info { |
41 | const void *access_addr; | |
42 | const void *first_bad_addr; | |
43 | size_t access_size; | |
44 | bool is_write; | |
45 | unsigned long ip; | |
46 | }; | |
47 | ||
bebf56a1 AR |
48 | /* The layout of struct dictated by compiler */ |
49 | struct kasan_source_location { | |
50 | const char *filename; | |
51 | int line_no; | |
52 | int column_no; | |
53 | }; | |
54 | ||
55 | /* The layout of struct dictated by compiler */ | |
56 | struct kasan_global { | |
57 | const void *beg; /* Address of the beginning of the global variable. */ | |
58 | size_t size; /* Size of the global variable. */ | |
59 | size_t size_with_redzone; /* Size of the variable + size of the red zone. 32 bytes aligned */ | |
60 | const void *name; | |
61 | const void *module_name; /* Name of the module where the global variable is declared. */ | |
62 | unsigned long has_dynamic_init; /* This needed for C++ */ | |
63 | #if KASAN_ABI_VERSION >= 4 | |
64 | struct kasan_source_location *location; | |
65 | #endif | |
045d599a DV |
66 | #if KASAN_ABI_VERSION >= 5 |
67 | char *odr_indicator; | |
68 | #endif | |
bebf56a1 AR |
69 | }; |
70 | ||
7ed2f9e6 AP |
71 | /** |
72 | * Structures to keep alloc and free tracks * | |
73 | */ | |
74 | ||
cd11016e AP |
75 | #define KASAN_STACK_DEPTH 64 |
76 | ||
7ed2f9e6 | 77 | struct kasan_track { |
cd11016e AP |
78 | u32 pid; |
79 | depot_stack_handle_t stack; | |
7ed2f9e6 AP |
80 | }; |
81 | ||
82 | struct kasan_alloc_meta { | |
b3cbd9bf AR |
83 | struct kasan_track alloc_track; |
84 | struct kasan_track free_track; | |
7ed2f9e6 AP |
85 | }; |
86 | ||
55834c59 AP |
87 | struct qlist_node { |
88 | struct qlist_node *next; | |
89 | }; | |
7ed2f9e6 | 90 | struct kasan_free_meta { |
55834c59 AP |
91 | /* This field is used while the object is in the quarantine. |
92 | * Otherwise it might be used for the allocator freelist. | |
93 | */ | |
94 | struct qlist_node quarantine_link; | |
7ed2f9e6 AP |
95 | }; |
96 | ||
97 | struct kasan_alloc_meta *get_alloc_info(struct kmem_cache *cache, | |
98 | const void *object); | |
99 | struct kasan_free_meta *get_free_info(struct kmem_cache *cache, | |
100 | const void *object); | |
101 | ||
0b24becc AR |
102 | static inline const void *kasan_shadow_to_mem(const void *shadow_addr) |
103 | { | |
104 | return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET) | |
105 | << KASAN_SHADOW_SCALE_SHIFT); | |
106 | } | |
107 | ||
0b24becc AR |
108 | void kasan_report(unsigned long addr, size_t size, |
109 | bool is_write, unsigned long ip); | |
ee3ce779 | 110 | void kasan_report_invalid_free(void *object, unsigned long ip); |
0b24becc | 111 | |
80a9201a | 112 | #if defined(CONFIG_SLAB) || defined(CONFIG_SLUB) |
55834c59 AP |
113 | void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache); |
114 | void quarantine_reduce(void); | |
115 | void quarantine_remove_cache(struct kmem_cache *cache); | |
116 | #else | |
117 | static inline void quarantine_put(struct kasan_free_meta *info, | |
118 | struct kmem_cache *cache) { } | |
119 | static inline void quarantine_reduce(void) { } | |
120 | static inline void quarantine_remove_cache(struct kmem_cache *cache) { } | |
121 | #endif | |
122 | ||
d321599c AP |
123 | /* |
124 | * Exported functions for interfaces called from assembly or from generated | |
125 | * code. Declarations here to avoid warning about missing declarations. | |
126 | */ | |
127 | asmlinkage void kasan_unpoison_task_stack_below(const void *watermark); | |
128 | void __asan_register_globals(struct kasan_global *globals, size_t size); | |
129 | void __asan_unregister_globals(struct kasan_global *globals, size_t size); | |
130 | void __asan_loadN(unsigned long addr, size_t size); | |
131 | void __asan_storeN(unsigned long addr, size_t size); | |
132 | void __asan_handle_no_return(void); | |
133 | void __asan_poison_stack_memory(const void *addr, size_t size); | |
134 | void __asan_unpoison_stack_memory(const void *addr, size_t size); | |
135 | void __asan_alloca_poison(unsigned long addr, size_t size); | |
136 | void __asan_allocas_unpoison(const void *stack_top, const void *stack_bottom); | |
137 | ||
138 | void __asan_load1(unsigned long addr); | |
139 | void __asan_store1(unsigned long addr); | |
140 | void __asan_load2(unsigned long addr); | |
141 | void __asan_store2(unsigned long addr); | |
142 | void __asan_load4(unsigned long addr); | |
143 | void __asan_store4(unsigned long addr); | |
144 | void __asan_load8(unsigned long addr); | |
145 | void __asan_store8(unsigned long addr); | |
146 | void __asan_load16(unsigned long addr); | |
147 | void __asan_store16(unsigned long addr); | |
148 | ||
149 | void __asan_load1_noabort(unsigned long addr); | |
150 | void __asan_store1_noabort(unsigned long addr); | |
151 | void __asan_load2_noabort(unsigned long addr); | |
152 | void __asan_store2_noabort(unsigned long addr); | |
153 | void __asan_load4_noabort(unsigned long addr); | |
154 | void __asan_store4_noabort(unsigned long addr); | |
155 | void __asan_load8_noabort(unsigned long addr); | |
156 | void __asan_store8_noabort(unsigned long addr); | |
157 | void __asan_load16_noabort(unsigned long addr); | |
158 | void __asan_store16_noabort(unsigned long addr); | |
159 | ||
160 | void __asan_set_shadow_00(const void *addr, size_t size); | |
161 | void __asan_set_shadow_f1(const void *addr, size_t size); | |
162 | void __asan_set_shadow_f2(const void *addr, size_t size); | |
163 | void __asan_set_shadow_f3(const void *addr, size_t size); | |
164 | void __asan_set_shadow_f5(const void *addr, size_t size); | |
165 | void __asan_set_shadow_f8(const void *addr, size_t size); | |
166 | ||
0b24becc | 167 | #endif |