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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0b24becc AR |
2 | #ifndef _LINUX_KASAN_H |
3 | #define _LINUX_KASAN_H | |
4 | ||
5 | #include <linux/types.h> | |
6 | ||
7 | struct kmem_cache; | |
8 | struct page; | |
a5af5aa8 | 9 | struct vm_struct; |
5be9b730 | 10 | struct task_struct; |
0b24becc AR |
11 | |
12 | #ifdef CONFIG_KASAN | |
13 | ||
0b24becc | 14 | #include <asm/kasan.h> |
69786cdb | 15 | #include <asm/pgtable.h> |
0b24becc | 16 | |
69786cdb AR |
17 | extern unsigned char kasan_zero_page[PAGE_SIZE]; |
18 | extern pte_t kasan_zero_pte[PTRS_PER_PTE]; | |
19 | extern pmd_t kasan_zero_pmd[PTRS_PER_PMD]; | |
20 | extern pud_t kasan_zero_pud[PTRS_PER_PUD]; | |
c65e774f | 21 | extern p4d_t kasan_zero_p4d[MAX_PTRS_PER_P4D]; |
69786cdb | 22 | |
0207df4f | 23 | int kasan_populate_zero_shadow(const void *shadow_start, |
69786cdb AR |
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() */ | |
af8601ad | 33 | extern void kasan_enable_current(void); |
0b24becc AR |
34 | |
35 | /* Disable reporting bugs for current task */ | |
af8601ad | 36 | extern void kasan_disable_current(void); |
0b24becc AR |
37 | |
38 | void kasan_unpoison_shadow(const void *address, size_t size); | |
39 | ||
e3ae1163 | 40 | void kasan_unpoison_task_stack(struct task_struct *task); |
9f7d416c | 41 | void kasan_unpoison_stack_above_sp_to(const void *watermark); |
e3ae1163 | 42 | |
b8c73fc2 AR |
43 | void kasan_alloc_pages(struct page *page, unsigned int order); |
44 | void kasan_free_pages(struct page *page, unsigned int order); | |
45 | ||
be4a7988 | 46 | void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, |
d50112ed | 47 | slab_flags_t *flags); |
55834c59 | 48 | void kasan_cache_shrink(struct kmem_cache *cache); |
f9fa1d91 | 49 | void kasan_cache_shutdown(struct kmem_cache *cache); |
7ed2f9e6 | 50 | |
0316bec2 AR |
51 | void kasan_poison_slab(struct page *page); |
52 | void kasan_unpoison_object_data(struct kmem_cache *cache, void *object); | |
53 | void kasan_poison_object_data(struct kmem_cache *cache, void *object); | |
b3cbd9bf | 54 | void kasan_init_slab_obj(struct kmem_cache *cache, const void *object); |
0316bec2 | 55 | |
505f5dcb | 56 | void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags); |
ee3ce779 | 57 | void kasan_kfree_large(void *ptr, unsigned long ip); |
6860f634 | 58 | void kasan_poison_kfree(void *ptr, unsigned long ip); |
505f5dcb AP |
59 | void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size, |
60 | gfp_t flags); | |
61 | void kasan_krealloc(const void *object, size_t new_size, gfp_t flags); | |
0316bec2 | 62 | |
505f5dcb | 63 | void kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags); |
ee3ce779 | 64 | bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip); |
0316bec2 | 65 | |
7ed2f9e6 AP |
66 | struct kasan_cache { |
67 | int alloc_meta_offset; | |
68 | int free_meta_offset; | |
69 | }; | |
70 | ||
bebf56a1 | 71 | int kasan_module_alloc(void *addr, size_t size); |
a5af5aa8 | 72 | void kasan_free_shadow(const struct vm_struct *vm); |
bebf56a1 | 73 | |
0207df4f AR |
74 | int kasan_add_zero_shadow(void *start, unsigned long size); |
75 | void kasan_remove_zero_shadow(void *start, unsigned long size); | |
76 | ||
9b75a867 AR |
77 | size_t ksize(const void *); |
78 | static inline void kasan_unpoison_slab(const void *ptr) { ksize(ptr); } | |
80a9201a | 79 | size_t kasan_metadata_size(struct kmem_cache *cache); |
9b75a867 | 80 | |
b0845ce5 MR |
81 | bool kasan_save_enable_multi_shot(void); |
82 | void kasan_restore_multi_shot(bool enabled); | |
83 | ||
0b24becc AR |
84 | #else /* CONFIG_KASAN */ |
85 | ||
86 | static inline void kasan_unpoison_shadow(const void *address, size_t size) {} | |
87 | ||
e3ae1163 | 88 | static inline void kasan_unpoison_task_stack(struct task_struct *task) {} |
9f7d416c | 89 | static inline void kasan_unpoison_stack_above_sp_to(const void *watermark) {} |
e3ae1163 | 90 | |
0b24becc AR |
91 | static inline void kasan_enable_current(void) {} |
92 | static inline void kasan_disable_current(void) {} | |
93 | ||
b8c73fc2 AR |
94 | static inline void kasan_alloc_pages(struct page *page, unsigned int order) {} |
95 | static inline void kasan_free_pages(struct page *page, unsigned int order) {} | |
96 | ||
7ed2f9e6 | 97 | static inline void kasan_cache_create(struct kmem_cache *cache, |
be4a7988 | 98 | unsigned int *size, |
d50112ed | 99 | slab_flags_t *flags) {} |
55834c59 | 100 | static inline void kasan_cache_shrink(struct kmem_cache *cache) {} |
f9fa1d91 | 101 | static inline void kasan_cache_shutdown(struct kmem_cache *cache) {} |
7ed2f9e6 | 102 | |
0316bec2 AR |
103 | static inline void kasan_poison_slab(struct page *page) {} |
104 | static inline void kasan_unpoison_object_data(struct kmem_cache *cache, | |
105 | void *object) {} | |
106 | static inline void kasan_poison_object_data(struct kmem_cache *cache, | |
107 | void *object) {} | |
b3cbd9bf AR |
108 | static inline void kasan_init_slab_obj(struct kmem_cache *cache, |
109 | const void *object) {} | |
0316bec2 | 110 | |
505f5dcb | 111 | static inline void kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) {} |
ee3ce779 | 112 | static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} |
6860f634 | 113 | static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {} |
0316bec2 | 114 | static inline void kasan_kmalloc(struct kmem_cache *s, const void *object, |
505f5dcb AP |
115 | size_t size, gfp_t flags) {} |
116 | static inline void kasan_krealloc(const void *object, size_t new_size, | |
117 | gfp_t flags) {} | |
0316bec2 | 118 | |
505f5dcb AP |
119 | static inline void kasan_slab_alloc(struct kmem_cache *s, void *object, |
120 | gfp_t flags) {} | |
ee3ce779 DV |
121 | static inline bool kasan_slab_free(struct kmem_cache *s, void *object, |
122 | unsigned long ip) | |
55834c59 AP |
123 | { |
124 | return false; | |
125 | } | |
0316bec2 | 126 | |
bebf56a1 | 127 | static inline int kasan_module_alloc(void *addr, size_t size) { return 0; } |
a5af5aa8 | 128 | static inline void kasan_free_shadow(const struct vm_struct *vm) {} |
bebf56a1 | 129 | |
0207df4f AR |
130 | static inline int kasan_add_zero_shadow(void *start, unsigned long size) |
131 | { | |
132 | return 0; | |
133 | } | |
134 | static inline void kasan_remove_zero_shadow(void *start, | |
135 | unsigned long size) | |
136 | {} | |
137 | ||
9b75a867 | 138 | static inline void kasan_unpoison_slab(const void *ptr) { } |
80a9201a | 139 | static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } |
9b75a867 | 140 | |
0b24becc AR |
141 | #endif /* CONFIG_KASAN */ |
142 | ||
143 | #endif /* LINUX_KASAN_H */ |