1 #ifndef _LINUX_KASAN_H
2 #define _LINUX_KASAN_H
3
4 #include <linux/types.h>
5
6 struct kmem_cache;
7 struct page;
8 struct vm_struct;
9
10 #ifdef CONFIG_KASAN
11
12 #define KASAN_SHADOW_SCALE_SHIFT 3
13 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
14
15 #include <asm/kasan.h>
16 #include <linux/sched.h>
17
kasan_mem_to_shadow(const void * addr)18 static inline void *kasan_mem_to_shadow(const void *addr)
19 {
20 return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)
21 + KASAN_SHADOW_OFFSET;
22 }
23
24 /* Enable reporting bugs after kasan_disable_current() */
kasan_enable_current(void)25 static inline void kasan_enable_current(void)
26 {
27 current->kasan_depth++;
28 }
29
30 /* Disable reporting bugs for current task */
kasan_disable_current(void)31 static inline void kasan_disable_current(void)
32 {
33 current->kasan_depth--;
34 }
35
36 void kasan_unpoison_shadow(const void *address, size_t size);
37
38 void kasan_alloc_pages(struct page *page, unsigned int order);
39 void kasan_free_pages(struct page *page, unsigned int order);
40
41 void kasan_poison_slab(struct page *page);
42 void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
43 void kasan_poison_object_data(struct kmem_cache *cache, void *object);
44
45 void kasan_kmalloc_large(const void *ptr, size_t size);
46 void kasan_kfree_large(const void *ptr);
47 void kasan_kfree(void *ptr);
48 void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size);
49 void kasan_krealloc(const void *object, size_t new_size);
50
51 void kasan_slab_alloc(struct kmem_cache *s, void *object);
52 void kasan_slab_free(struct kmem_cache *s, void *object);
53
54 int kasan_module_alloc(void *addr, size_t size);
55 void kasan_free_shadow(const struct vm_struct *vm);
56
57 #else /* CONFIG_KASAN */
58
kasan_unpoison_shadow(const void * address,size_t size)59 static inline void kasan_unpoison_shadow(const void *address, size_t size) {}
60
kasan_enable_current(void)61 static inline void kasan_enable_current(void) {}
kasan_disable_current(void)62 static inline void kasan_disable_current(void) {}
63
kasan_alloc_pages(struct page * page,unsigned int order)64 static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
kasan_free_pages(struct page * page,unsigned int order)65 static inline void kasan_free_pages(struct page *page, unsigned int order) {}
66
kasan_poison_slab(struct page * page)67 static inline void kasan_poison_slab(struct page *page) {}
kasan_unpoison_object_data(struct kmem_cache * cache,void * object)68 static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
69 void *object) {}
kasan_poison_object_data(struct kmem_cache * cache,void * object)70 static inline void kasan_poison_object_data(struct kmem_cache *cache,
71 void *object) {}
72
kasan_kmalloc_large(void * ptr,size_t size)73 static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
kasan_kfree_large(const void * ptr)74 static inline void kasan_kfree_large(const void *ptr) {}
kasan_kfree(void * ptr)75 static inline void kasan_kfree(void *ptr) {}
kasan_kmalloc(struct kmem_cache * s,const void * object,size_t size)76 static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
77 size_t size) {}
kasan_krealloc(const void * object,size_t new_size)78 static inline void kasan_krealloc(const void *object, size_t new_size) {}
79
kasan_slab_alloc(struct kmem_cache * s,void * object)80 static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {}
kasan_slab_free(struct kmem_cache * s,void * object)81 static inline void kasan_slab_free(struct kmem_cache *s, void *object) {}
82
kasan_module_alloc(void * addr,size_t size)83 static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
kasan_free_shadow(const struct vm_struct * vm)84 static inline void kasan_free_shadow(const struct vm_struct *vm) {}
85
86 #endif /* CONFIG_KASAN */
87
88 #endif /* LINUX_KASAN_H */
89