4 #include <linux/types.h>
12 #define KASAN_SHADOW_SCALE_SHIFT 3
14 #include <asm/kasan.h>
15 #include <asm/pgtable.h>
16 #include <linux/sched.h>
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];
23 void kasan_populate_zero_shadow(const void *shadow_start,
24 const void *shadow_end);
26 static inline void *kasan_mem_to_shadow(const void *addr)
28 return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)
29 + KASAN_SHADOW_OFFSET;
32 /* Enable reporting bugs after kasan_disable_current() */
33 static inline void kasan_enable_current(void)
35 current->kasan_depth++;
38 /* Disable reporting bugs for current task */
39 static inline void kasan_disable_current(void)
41 current->kasan_depth--;
44 void kasan_unpoison_shadow(const void *address, size_t size);
46 void kasan_alloc_pages(struct page *page, unsigned int order);
47 void kasan_free_pages(struct page *page, unsigned int order);
49 void kasan_poison_slab(struct page *page);
50 void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
51 void kasan_poison_object_data(struct kmem_cache *cache, void *object);
53 void kasan_kmalloc_large(const void *ptr, size_t size);
54 void kasan_kfree_large(const void *ptr);
55 void kasan_kfree(void *ptr);
56 void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size);
57 void kasan_krealloc(const void *object, size_t new_size);
59 void kasan_slab_alloc(struct kmem_cache *s, void *object);
60 void kasan_slab_free(struct kmem_cache *s, void *object);
62 int kasan_module_alloc(void *addr, size_t size);
63 void kasan_free_shadow(const struct vm_struct *vm);
65 #else /* CONFIG_KASAN */
67 static inline void kasan_unpoison_shadow(const void *address, size_t size) {}
69 static inline void kasan_enable_current(void) {}
70 static inline void kasan_disable_current(void) {}
72 static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
73 static inline void kasan_free_pages(struct page *page, unsigned int order) {}
75 static inline void kasan_poison_slab(struct page *page) {}
76 static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
78 static inline void kasan_poison_object_data(struct kmem_cache *cache,
81 static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
82 static inline void kasan_kfree_large(const void *ptr) {}
83 static inline void kasan_kfree(void *ptr) {}
84 static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
86 static inline void kasan_krealloc(const void *object, size_t new_size) {}
88 static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {}
89 static inline void kasan_slab_free(struct kmem_cache *s, void *object) {}
91 static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
92 static inline void kasan_free_shadow(const struct vm_struct *vm) {}
94 #endif /* CONFIG_KASAN */
96 #endif /* LINUX_KASAN_H */