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 9 #ifdef CONFIG_KASAN 10 11 #define KASAN_SHADOW_SCALE_SHIFT 3 12 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) 13 14 #include <asm/kasan.h> 15 #include <linux/sched.h> 16 17 static inline void *kasan_mem_to_shadow(const void *addr) 18 { 19 return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT) 20 + KASAN_SHADOW_OFFSET; 21 } 22 23 /* Enable reporting bugs after kasan_disable_current() */ 24 static inline void kasan_enable_current(void) 25 { 26 current->kasan_depth++; 27 } 28 29 /* Disable reporting bugs for current task */ 30 static inline void kasan_disable_current(void) 31 { 32 current->kasan_depth--; 33 } 34 35 void kasan_unpoison_shadow(const void *address, size_t size); 36 37 void kasan_alloc_pages(struct page *page, unsigned int order); 38 void kasan_free_pages(struct page *page, unsigned int order); 39 40 void kasan_poison_slab(struct page *page); 41 void kasan_unpoison_object_data(struct kmem_cache *cache, void *object); 42 void kasan_poison_object_data(struct kmem_cache *cache, void *object); 43 44 void kasan_kmalloc_large(const void *ptr, size_t size); 45 void kasan_kfree_large(const void *ptr); 46 void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size); 47 void kasan_krealloc(const void *object, size_t new_size); 48 49 void kasan_slab_alloc(struct kmem_cache *s, void *object); 50 void kasan_slab_free(struct kmem_cache *s, void *object); 51 52 #define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) 53 54 int kasan_module_alloc(void *addr, size_t size); 55 void kasan_module_free(void *addr); 56 57 #else /* CONFIG_KASAN */ 58 59 #define MODULE_ALIGN 1 60 61 static inline void kasan_unpoison_shadow(const void *address, size_t size) {} 62 63 static inline void kasan_enable_current(void) {} 64 static inline void kasan_disable_current(void) {} 65 66 static inline void kasan_alloc_pages(struct page *page, unsigned int order) {} 67 static inline void kasan_free_pages(struct page *page, unsigned int order) {} 68 69 static inline void kasan_poison_slab(struct page *page) {} 70 static inline void kasan_unpoison_object_data(struct kmem_cache *cache, 71 void *object) {} 72 static inline void kasan_poison_object_data(struct kmem_cache *cache, 73 void *object) {} 74 75 static inline void kasan_kmalloc_large(void *ptr, size_t size) {} 76 static inline void kasan_kfree_large(const void *ptr) {} 77 static inline void kasan_kmalloc(struct kmem_cache *s, const void *object, 78 size_t size) {} 79 static inline void kasan_krealloc(const void *object, size_t new_size) {} 80 81 static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {} 82 static inline void kasan_slab_free(struct kmem_cache *s, void *object) {} 83 84 static inline int kasan_module_alloc(void *addr, size_t size) { return 0; } 85 static inline void kasan_module_free(void *addr) {} 86 87 #endif /* CONFIG_KASAN */ 88 89 #endif /* LINUX_KASAN_H */ 90