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Commit | Line | Data |
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0b24becc AR |
1 | #ifndef _LINUX_KASAN_H |
2 | #define _LINUX_KASAN_H | |
3 | ||
e3ae1163 | 4 | #include <linux/sched.h> |
0b24becc AR |
5 | #include <linux/types.h> |
6 | ||
7 | struct kmem_cache; | |
8 | struct page; | |
a5af5aa8 | 9 | struct vm_struct; |
0b24becc AR |
10 | |
11 | #ifdef CONFIG_KASAN | |
12 | ||
13 | #define KASAN_SHADOW_SCALE_SHIFT 3 | |
0b24becc AR |
14 | |
15 | #include <asm/kasan.h> | |
69786cdb | 16 | #include <asm/pgtable.h> |
0b24becc | 17 | |
69786cdb AR |
18 | extern unsigned char kasan_zero_page[PAGE_SIZE]; |
19 | extern pte_t kasan_zero_pte[PTRS_PER_PTE]; | |
20 | extern pmd_t kasan_zero_pmd[PTRS_PER_PMD]; | |
21 | extern pud_t kasan_zero_pud[PTRS_PER_PUD]; | |
22 | ||
23 | void kasan_populate_zero_shadow(const void *shadow_start, | |
24 | const void *shadow_end); | |
25 | ||
0b24becc AR |
26 | static inline void *kasan_mem_to_shadow(const void *addr) |
27 | { | |
28 | return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT) | |
29 | + KASAN_SHADOW_OFFSET; | |
30 | } | |
31 | ||
32 | /* Enable reporting bugs after kasan_disable_current() */ | |
33 | static inline void kasan_enable_current(void) | |
34 | { | |
35 | current->kasan_depth++; | |
36 | } | |
37 | ||
38 | /* Disable reporting bugs for current task */ | |
39 | static inline void kasan_disable_current(void) | |
40 | { | |
41 | current->kasan_depth--; | |
42 | } | |
43 | ||
44 | void kasan_unpoison_shadow(const void *address, size_t size); | |
45 | ||
e3ae1163 MR |
46 | void kasan_unpoison_task_stack(struct task_struct *task); |
47 | ||
b8c73fc2 AR |
48 | void kasan_alloc_pages(struct page *page, unsigned int order); |
49 | void kasan_free_pages(struct page *page, unsigned int order); | |
50 | ||
7ed2f9e6 AP |
51 | void kasan_cache_create(struct kmem_cache *cache, size_t *size, |
52 | unsigned long *flags); | |
53 | ||
0316bec2 AR |
54 | void kasan_poison_slab(struct page *page); |
55 | void kasan_unpoison_object_data(struct kmem_cache *cache, void *object); | |
56 | void kasan_poison_object_data(struct kmem_cache *cache, void *object); | |
57 | ||
505f5dcb | 58 | void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags); |
0316bec2 | 59 | void kasan_kfree_large(const void *ptr); |
92393615 | 60 | void kasan_kfree(void *ptr); |
505f5dcb AP |
61 | void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size, |
62 | gfp_t flags); | |
63 | void kasan_krealloc(const void *object, size_t new_size, gfp_t flags); | |
0316bec2 | 64 | |
505f5dcb | 65 | void kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags); |
0316bec2 AR |
66 | void kasan_slab_free(struct kmem_cache *s, void *object); |
67 | ||
7ed2f9e6 AP |
68 | struct kasan_cache { |
69 | int alloc_meta_offset; | |
70 | int free_meta_offset; | |
71 | }; | |
72 | ||
bebf56a1 | 73 | int kasan_module_alloc(void *addr, size_t size); |
a5af5aa8 | 74 | void kasan_free_shadow(const struct vm_struct *vm); |
bebf56a1 | 75 | |
0b24becc AR |
76 | #else /* CONFIG_KASAN */ |
77 | ||
78 | static inline void kasan_unpoison_shadow(const void *address, size_t size) {} | |
79 | ||
e3ae1163 MR |
80 | static inline void kasan_unpoison_task_stack(struct task_struct *task) {} |
81 | ||
0b24becc AR |
82 | static inline void kasan_enable_current(void) {} |
83 | static inline void kasan_disable_current(void) {} | |
84 | ||
b8c73fc2 AR |
85 | static inline void kasan_alloc_pages(struct page *page, unsigned int order) {} |
86 | static inline void kasan_free_pages(struct page *page, unsigned int order) {} | |
87 | ||
7ed2f9e6 AP |
88 | static inline void kasan_cache_create(struct kmem_cache *cache, |
89 | size_t *size, | |
90 | unsigned long *flags) {} | |
91 | ||
0316bec2 AR |
92 | static inline void kasan_poison_slab(struct page *page) {} |
93 | static inline void kasan_unpoison_object_data(struct kmem_cache *cache, | |
94 | void *object) {} | |
95 | static inline void kasan_poison_object_data(struct kmem_cache *cache, | |
96 | void *object) {} | |
97 | ||
505f5dcb | 98 | static inline void kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) {} |
0316bec2 | 99 | static inline void kasan_kfree_large(const void *ptr) {} |
92393615 | 100 | static inline void kasan_kfree(void *ptr) {} |
0316bec2 | 101 | static inline void kasan_kmalloc(struct kmem_cache *s, const void *object, |
505f5dcb AP |
102 | size_t size, gfp_t flags) {} |
103 | static inline void kasan_krealloc(const void *object, size_t new_size, | |
104 | gfp_t flags) {} | |
0316bec2 | 105 | |
505f5dcb AP |
106 | static inline void kasan_slab_alloc(struct kmem_cache *s, void *object, |
107 | gfp_t flags) {} | |
0316bec2 AR |
108 | static inline void kasan_slab_free(struct kmem_cache *s, void *object) {} |
109 | ||
bebf56a1 | 110 | static inline int kasan_module_alloc(void *addr, size_t size) { return 0; } |
a5af5aa8 | 111 | static inline void kasan_free_shadow(const struct vm_struct *vm) {} |
bebf56a1 | 112 | |
0b24becc AR |
113 | #endif /* CONFIG_KASAN */ |
114 | ||
115 | #endif /* LINUX_KASAN_H */ |