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