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 */
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