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 | ||
14 | #define KASAN_SHADOW_SCALE_SHIFT 3 | |
0b24becc AR |
15 | |
16 | #include <asm/kasan.h> | |
69786cdb | 17 | #include <asm/pgtable.h> |
0b24becc | 18 | |
69786cdb AR |
19 | extern unsigned char kasan_zero_page[PAGE_SIZE]; |
20 | extern pte_t kasan_zero_pte[PTRS_PER_PTE]; | |
21 | extern pmd_t kasan_zero_pmd[PTRS_PER_PMD]; | |
22 | extern pud_t kasan_zero_pud[PTRS_PER_PUD]; | |
c2febafc | 23 | extern p4d_t kasan_zero_p4d[PTRS_PER_P4D]; |
69786cdb AR |
24 | |
25 | void kasan_populate_zero_shadow(const void *shadow_start, | |
26 | const void *shadow_end); | |
27 | ||
0b24becc AR |
28 | static inline void *kasan_mem_to_shadow(const void *addr) |
29 | { | |
30 | return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT) | |
31 | + KASAN_SHADOW_OFFSET; | |
32 | } | |
33 | ||
34 | /* Enable reporting bugs after kasan_disable_current() */ | |
af8601ad | 35 | extern void kasan_enable_current(void); |
0b24becc AR |
36 | |
37 | /* Disable reporting bugs for current task */ | |
af8601ad | 38 | extern void kasan_disable_current(void); |
0b24becc AR |
39 | |
40 | void kasan_unpoison_shadow(const void *address, size_t size); | |
41 | ||
e3ae1163 | 42 | void kasan_unpoison_task_stack(struct task_struct *task); |
9f7d416c | 43 | void kasan_unpoison_stack_above_sp_to(const void *watermark); |
e3ae1163 | 44 | |
b8c73fc2 AR |
45 | void kasan_alloc_pages(struct page *page, unsigned int order); |
46 | void kasan_free_pages(struct page *page, unsigned int order); | |
47 | ||
7ed2f9e6 | 48 | void kasan_cache_create(struct kmem_cache *cache, size_t *size, |
d50112ed | 49 | slab_flags_t *flags); |
55834c59 | 50 | void kasan_cache_shrink(struct kmem_cache *cache); |
f9fa1d91 | 51 | void kasan_cache_shutdown(struct kmem_cache *cache); |
7ed2f9e6 | 52 | |
0316bec2 AR |
53 | void kasan_poison_slab(struct page *page); |
54 | void kasan_unpoison_object_data(struct kmem_cache *cache, void *object); | |
55 | void kasan_poison_object_data(struct kmem_cache *cache, void *object); | |
b3cbd9bf | 56 | void kasan_init_slab_obj(struct kmem_cache *cache, const void *object); |
0316bec2 | 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); |
9b75a867 | 60 | void kasan_poison_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); |
55834c59 | 66 | bool kasan_slab_free(struct kmem_cache *s, void *object); |
0316bec2 | 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 | |
9b75a867 AR |
76 | size_t ksize(const void *); |
77 | static inline void kasan_unpoison_slab(const void *ptr) { ksize(ptr); } | |
80a9201a | 78 | size_t kasan_metadata_size(struct kmem_cache *cache); |
9b75a867 | 79 | |
b0845ce5 MR |
80 | bool kasan_save_enable_multi_shot(void); |
81 | void kasan_restore_multi_shot(bool enabled); | |
82 | ||
0b24becc AR |
83 | #else /* CONFIG_KASAN */ |
84 | ||
85 | static inline void kasan_unpoison_shadow(const void *address, size_t size) {} | |
86 | ||
e3ae1163 | 87 | static inline void kasan_unpoison_task_stack(struct task_struct *task) {} |
9f7d416c | 88 | static inline void kasan_unpoison_stack_above_sp_to(const void *watermark) {} |
e3ae1163 | 89 | |
0b24becc AR |
90 | static inline void kasan_enable_current(void) {} |
91 | static inline void kasan_disable_current(void) {} | |
92 | ||
b8c73fc2 AR |
93 | static inline void kasan_alloc_pages(struct page *page, unsigned int order) {} |
94 | static inline void kasan_free_pages(struct page *page, unsigned int order) {} | |
95 | ||
7ed2f9e6 AP |
96 | static inline void kasan_cache_create(struct kmem_cache *cache, |
97 | size_t *size, | |
d50112ed | 98 | slab_flags_t *flags) {} |
55834c59 | 99 | static inline void kasan_cache_shrink(struct kmem_cache *cache) {} |
f9fa1d91 | 100 | static inline void kasan_cache_shutdown(struct kmem_cache *cache) {} |
7ed2f9e6 | 101 | |
0316bec2 AR |
102 | static inline void kasan_poison_slab(struct page *page) {} |
103 | static inline void kasan_unpoison_object_data(struct kmem_cache *cache, | |
104 | void *object) {} | |
105 | static inline void kasan_poison_object_data(struct kmem_cache *cache, | |
106 | void *object) {} | |
b3cbd9bf AR |
107 | static inline void kasan_init_slab_obj(struct kmem_cache *cache, |
108 | const void *object) {} | |
0316bec2 | 109 | |
505f5dcb | 110 | static inline void kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) {} |
0316bec2 | 111 | static inline void kasan_kfree_large(const void *ptr) {} |
9b75a867 | 112 | static inline void kasan_poison_kfree(void *ptr) {} |
0316bec2 | 113 | static inline void kasan_kmalloc(struct kmem_cache *s, const void *object, |
505f5dcb AP |
114 | size_t size, gfp_t flags) {} |
115 | static inline void kasan_krealloc(const void *object, size_t new_size, | |
116 | gfp_t flags) {} | |
0316bec2 | 117 | |
505f5dcb AP |
118 | static inline void kasan_slab_alloc(struct kmem_cache *s, void *object, |
119 | gfp_t flags) {} | |
55834c59 AP |
120 | static inline bool kasan_slab_free(struct kmem_cache *s, void *object) |
121 | { | |
122 | return false; | |
123 | } | |
0316bec2 | 124 | |
bebf56a1 | 125 | static inline int kasan_module_alloc(void *addr, size_t size) { return 0; } |
a5af5aa8 | 126 | static inline void kasan_free_shadow(const struct vm_struct *vm) {} |
bebf56a1 | 127 | |
9b75a867 | 128 | static inline void kasan_unpoison_slab(const void *ptr) { } |
80a9201a | 129 | static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } |
9b75a867 | 130 | |
0b24becc AR |
131 | #endif /* CONFIG_KASAN */ |
132 | ||
133 | #endif /* LINUX_KASAN_H */ |