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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - include/linux/kasan.h
1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/types.h>
14 #include <asm/kasan.h>
15 #include <asm/pgtable.h>
17 extern unsigned char kasan_zero_page
[PAGE_SIZE
];
18 extern pte_t kasan_zero_pte
[PTRS_PER_PTE
];
19 extern pmd_t kasan_zero_pmd
[PTRS_PER_PMD
];
20 extern pud_t kasan_zero_pud
[PTRS_PER_PUD
];
21 extern p4d_t kasan_zero_p4d
[MAX_PTRS_PER_P4D
];
23 int 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 extern void kasan_enable_current(void);
35 /* Disable reporting bugs for current task */
36 extern void kasan_disable_current(void);
38 void kasan_unpoison_shadow(const void *address
, size_t size
);
40 void kasan_unpoison_task_stack(struct task_struct
*task
);
41 void kasan_unpoison_stack_above_sp_to(const void *watermark
);
43 void kasan_alloc_pages(struct page
*page
, unsigned int order
);
44 void kasan_free_pages(struct page
*page
, unsigned int order
);
46 void kasan_cache_create(struct kmem_cache
*cache
, unsigned int *size
,
48 void kasan_cache_shrink(struct kmem_cache
*cache
);
49 void kasan_cache_shutdown(struct kmem_cache
*cache
);
51 void kasan_poison_slab(struct page
*page
);
52 void kasan_unpoison_object_data(struct kmem_cache
*cache
, void *object
);
53 void kasan_poison_object_data(struct kmem_cache
*cache
, void *object
);
54 void kasan_init_slab_obj(struct kmem_cache
*cache
, const void *object
);
56 void kasan_kmalloc_large(const void *ptr
, size_t size
, gfp_t flags
);
57 void kasan_kfree_large(void *ptr
, unsigned long ip
);
58 void kasan_poison_kfree(void *ptr
, unsigned long ip
);
59 void kasan_kmalloc(struct kmem_cache
*s
, const void *object
, size_t size
,
61 void kasan_krealloc(const void *object
, size_t new_size
, gfp_t flags
);
63 void kasan_slab_alloc(struct kmem_cache
*s
, void *object
, gfp_t flags
);
64 bool kasan_slab_free(struct kmem_cache
*s
, void *object
, unsigned long ip
);
67 int alloc_meta_offset
;
71 int kasan_module_alloc(void *addr
, size_t size
);
72 void kasan_free_shadow(const struct vm_struct
*vm
);
74 int kasan_add_zero_shadow(void *start
, unsigned long size
);
75 void kasan_remove_zero_shadow(void *start
, unsigned long size
);
77 size_t ksize(const void *);
78 static inline void kasan_unpoison_slab(const void *ptr
) { ksize(ptr
); }
79 size_t kasan_metadata_size(struct kmem_cache
*cache
);
81 bool kasan_save_enable_multi_shot(void);
82 void kasan_restore_multi_shot(bool enabled
);
84 #else /* CONFIG_KASAN */
86 static inline void kasan_unpoison_shadow(const void *address
, size_t size
) {}
88 static inline void kasan_unpoison_task_stack(struct task_struct
*task
) {}
89 static inline void kasan_unpoison_stack_above_sp_to(const void *watermark
) {}
91 static inline void kasan_enable_current(void) {}
92 static inline void kasan_disable_current(void) {}
94 static inline void kasan_alloc_pages(struct page
*page
, unsigned int order
) {}
95 static inline void kasan_free_pages(struct page
*page
, unsigned int order
) {}
97 static inline void kasan_cache_create(struct kmem_cache
*cache
,
99 slab_flags_t
*flags
) {}
100 static inline void kasan_cache_shrink(struct kmem_cache
*cache
) {}
101 static inline void kasan_cache_shutdown(struct kmem_cache
*cache
) {}
103 static inline void kasan_poison_slab(struct page
*page
) {}
104 static inline void kasan_unpoison_object_data(struct kmem_cache
*cache
,
106 static inline void kasan_poison_object_data(struct kmem_cache
*cache
,
108 static inline void kasan_init_slab_obj(struct kmem_cache
*cache
,
109 const void *object
) {}
111 static inline void kasan_kmalloc_large(void *ptr
, size_t size
, gfp_t flags
) {}
112 static inline void kasan_kfree_large(void *ptr
, unsigned long ip
) {}
113 static inline void kasan_poison_kfree(void *ptr
, unsigned long ip
) {}
114 static inline void kasan_kmalloc(struct kmem_cache
*s
, const void *object
,
115 size_t size
, gfp_t flags
) {}
116 static inline void kasan_krealloc(const void *object
, size_t new_size
,
119 static inline void kasan_slab_alloc(struct kmem_cache
*s
, void *object
,
121 static inline bool kasan_slab_free(struct kmem_cache
*s
, void *object
,
127 static inline int kasan_module_alloc(void *addr
, size_t size
) { return 0; }
128 static inline void kasan_free_shadow(const struct vm_struct
*vm
) {}
130 static inline int kasan_add_zero_shadow(void *start
, unsigned long size
)
134 static inline void kasan_remove_zero_shadow(void *start
,
138 static inline void kasan_unpoison_slab(const void *ptr
) { }
139 static inline size_t kasan_metadata_size(struct kmem_cache
*cache
) { return 0; }
141 #endif /* CONFIG_KASAN */
143 #endif /* LINUX_KASAN_H */