Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0b24becc AR |
2 | #ifndef __MM_KASAN_KASAN_H |
3 | #define __MM_KASAN_KASAN_H | |
4 | ||
5 | #include <linux/kasan.h> | |
82868247 | 6 | #include <linux/kasan-tags.h> |
2b830526 | 7 | #include <linux/kfence.h> |
cd11016e | 8 | #include <linux/stackdepot.h> |
0b24becc | 9 | |
8028caac | 10 | #ifdef CONFIG_KASAN_HW_TAGS |
8f7b5054 | 11 | |
8028caac | 12 | #include <linux/static_key.h> |
77a63c69 | 13 | #include "../slab.h" |
8f7b5054 | 14 | |
551b2bcb | 15 | DECLARE_STATIC_KEY_TRUE(kasan_flag_vmalloc); |
241944d1 | 16 | DECLARE_STATIC_KEY_TRUE(kasan_flag_stacktrace); |
2d27e585 VF |
17 | |
18 | enum kasan_mode { | |
19 | KASAN_MODE_SYNC, | |
20 | KASAN_MODE_ASYNC, | |
21 | KASAN_MODE_ASYMM, | |
22 | }; | |
23 | ||
24 | extern enum kasan_mode kasan_mode __ro_after_init; | |
8f7b5054 | 25 | |
551b2bcb AK |
26 | static inline bool kasan_vmalloc_enabled(void) |
27 | { | |
28 | return static_branch_likely(&kasan_flag_vmalloc); | |
29 | } | |
30 | ||
8028caac AK |
31 | static inline bool kasan_stack_collection_enabled(void) |
32 | { | |
33 | return static_branch_unlikely(&kasan_flag_stacktrace); | |
34 | } | |
8f7b5054 | 35 | |
2d27e585 VF |
36 | static inline bool kasan_async_fault_possible(void) |
37 | { | |
38 | return kasan_mode == KASAN_MODE_ASYNC || kasan_mode == KASAN_MODE_ASYMM; | |
39 | } | |
40 | ||
41 | static inline bool kasan_sync_fault_possible(void) | |
8f7b5054 | 42 | { |
2d27e585 | 43 | return kasan_mode == KASAN_MODE_SYNC || kasan_mode == KASAN_MODE_ASYMM; |
8f7b5054 | 44 | } |
fc0e5b91 | 45 | |
8028caac | 46 | #else |
8f7b5054 | 47 | |
8028caac AK |
48 | static inline bool kasan_stack_collection_enabled(void) |
49 | { | |
50 | return true; | |
51 | } | |
8f7b5054 | 52 | |
2d27e585 | 53 | static inline bool kasan_async_fault_possible(void) |
8f7b5054 VF |
54 | { |
55 | return false; | |
56 | } | |
57 | ||
2d27e585 VF |
58 | static inline bool kasan_sync_fault_possible(void) |
59 | { | |
60 | return true; | |
61 | } | |
62 | ||
8028caac AK |
63 | #endif |
64 | ||
6c6a04fe | 65 | #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
1f600626 | 66 | #define KASAN_GRANULE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT) |
6c6a04fe AK |
67 | #else |
68 | #include <asm/mte-kasan.h> | |
69 | #define KASAN_GRANULE_SIZE MTE_GRANULE_SIZE | |
70 | #endif | |
71 | ||
1f600626 | 72 | #define KASAN_GRANULE_MASK (KASAN_GRANULE_SIZE - 1) |
0b24becc | 73 | |
affc3f07 AK |
74 | #define KASAN_MEMORY_PER_SHADOW_PAGE (KASAN_GRANULE_SIZE << PAGE_SHIFT) |
75 | ||
7f94ffbc | 76 | #ifdef CONFIG_KASAN_GENERIC |
06bc4cf6 | 77 | #define KASAN_PAGE_FREE 0xFF /* freed page */ |
83f8e4a8 | 78 | #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocation */ |
06bc4cf6 AK |
79 | #define KASAN_SLAB_REDZONE 0xFC /* redzone for slab object */ |
80 | #define KASAN_SLAB_FREE 0xFB /* freed slab object */ | |
83f8e4a8 | 81 | #define KASAN_VMALLOC_INVALID 0xF8 /* inaccessible space in vmap area */ |
7f94ffbc | 82 | #else |
06bc4cf6 | 83 | #define KASAN_PAGE_FREE KASAN_TAG_INVALID |
83f8e4a8 | 84 | #define KASAN_PAGE_REDZONE KASAN_TAG_INVALID |
06bc4cf6 AK |
85 | #define KASAN_SLAB_REDZONE KASAN_TAG_INVALID |
86 | #define KASAN_SLAB_FREE KASAN_TAG_INVALID | |
83f8e4a8 | 87 | #define KASAN_VMALLOC_INVALID KASAN_TAG_INVALID /* only used for SW_TAGS */ |
7f94ffbc AK |
88 | #endif |
89 | ||
fe1ac91e AK |
90 | #ifdef CONFIG_KASAN_GENERIC |
91 | ||
06bc4cf6 | 92 | #define KASAN_SLAB_FREETRACK 0xFA /* freed slab object with free track */ |
83f8e4a8 | 93 | #define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ |
0316bec2 | 94 | |
fc0e5b91 | 95 | /* Stack redzone shadow values. Compiler ABI, do not change. */ |
83f8e4a8 AK |
96 | #define KASAN_STACK_LEFT 0xF1 |
97 | #define KASAN_STACK_MID 0xF2 | |
98 | #define KASAN_STACK_RIGHT 0xF3 | |
99 | #define KASAN_STACK_PARTIAL 0xF4 | |
c420f167 | 100 | |
fc0e5b91 | 101 | /* alloca redzone shadow values. */ |
342061ee PL |
102 | #define KASAN_ALLOCA_LEFT 0xCA |
103 | #define KASAN_ALLOCA_RIGHT 0xCB | |
104 | ||
fc0e5b91 | 105 | /* alloca redzone size. Compiler ABI, do not change. */ |
342061ee PL |
106 | #define KASAN_ALLOCA_REDZONE_SIZE 32 |
107 | ||
fc0e5b91 | 108 | /* Stack frame marker. Compiler ABI, do not change. */ |
e8969219 ME |
109 | #define KASAN_CURRENT_STACK_FRAME_MAGIC 0x41B58AB3 |
110 | ||
fc0e5b91 | 111 | /* Dummy value to avoid breaking randconfig/all*config builds. */ |
bebf56a1 AR |
112 | #ifndef KASAN_ABI_VERSION |
113 | #define KASAN_ABI_VERSION 1 | |
114 | #endif | |
b8c73fc2 | 115 | |
fe1ac91e AK |
116 | #endif /* CONFIG_KASAN_GENERIC */ |
117 | ||
96e0279d AK |
118 | /* Metadata layout customization. */ |
119 | #define META_BYTES_PER_BLOCK 1 | |
120 | #define META_BLOCKS_PER_ROW 16 | |
121 | #define META_BYTES_PER_ROW (META_BLOCKS_PER_ROW * META_BYTES_PER_BLOCK) | |
122 | #define META_MEM_BYTES_PER_ROW (META_BYTES_PER_ROW * KASAN_GRANULE_SIZE) | |
123 | #define META_ROWS_AROUND_ADDR 2 | |
124 | ||
31c65110 AK |
125 | enum kasan_report_type { |
126 | KASAN_REPORT_ACCESS, | |
127 | KASAN_REPORT_INVALID_FREE, | |
3de0de75 | 128 | KASAN_REPORT_DOUBLE_FREE, |
31c65110 AK |
129 | }; |
130 | ||
c965cdd6 | 131 | struct kasan_report_info { |
31c65110 | 132 | enum kasan_report_type type; |
9d7b7dd9 AK |
133 | void *access_addr; |
134 | void *first_bad_addr; | |
0b24becc AR |
135 | size_t access_size; |
136 | bool is_write; | |
137 | unsigned long ip; | |
138 | }; | |
139 | ||
fc0e5b91 | 140 | /* Do not change the struct layout: compiler ABI. */ |
bebf56a1 AR |
141 | struct kasan_source_location { |
142 | const char *filename; | |
143 | int line_no; | |
144 | int column_no; | |
145 | }; | |
146 | ||
fc0e5b91 | 147 | /* Do not change the struct layout: compiler ABI. */ |
bebf56a1 AR |
148 | struct kasan_global { |
149 | const void *beg; /* Address of the beginning of the global variable. */ | |
150 | size_t size; /* Size of the global variable. */ | |
fc0e5b91 | 151 | size_t size_with_redzone; /* Size of the variable + size of the redzone. 32 bytes aligned. */ |
bebf56a1 AR |
152 | const void *name; |
153 | const void *module_name; /* Name of the module where the global variable is declared. */ | |
fc0e5b91 | 154 | unsigned long has_dynamic_init; /* This is needed for C++. */ |
bebf56a1 AR |
155 | #if KASAN_ABI_VERSION >= 4 |
156 | struct kasan_source_location *location; | |
157 | #endif | |
045d599a DV |
158 | #if KASAN_ABI_VERSION >= 5 |
159 | char *odr_indicator; | |
160 | #endif | |
bebf56a1 AR |
161 | }; |
162 | ||
fc0e5b91 | 163 | /* Structures for keeping alloc and free tracks. */ |
7ed2f9e6 | 164 | |
cd11016e AP |
165 | #define KASAN_STACK_DEPTH 64 |
166 | ||
7ed2f9e6 | 167 | struct kasan_track { |
cd11016e AP |
168 | u32 pid; |
169 | depot_stack_handle_t stack; | |
7ed2f9e6 AP |
170 | }; |
171 | ||
7a22bdc3 | 172 | #if defined(CONFIG_KASAN_TAGS_IDENTIFY) && defined(CONFIG_KASAN_SW_TAGS) |
ae8f06b3 WW |
173 | #define KASAN_NR_FREE_STACKS 5 |
174 | #else | |
175 | #define KASAN_NR_FREE_STACKS 1 | |
176 | #endif | |
177 | ||
7ed2f9e6 | 178 | struct kasan_alloc_meta { |
b3cbd9bf | 179 | struct kasan_track alloc_track; |
fc0e5b91 | 180 | /* Generic mode stores free track in kasan_free_meta. */ |
26e760c9 | 181 | #ifdef CONFIG_KASAN_GENERIC |
26e760c9 | 182 | depot_stack_handle_t aux_stack[2]; |
e4b7818b | 183 | #else |
ae8f06b3 | 184 | struct kasan_track free_track[KASAN_NR_FREE_STACKS]; |
e4b7818b | 185 | #endif |
f06f78ab | 186 | #ifdef CONFIG_KASAN_TAGS_IDENTIFY |
ae8f06b3 WW |
187 | u8 free_pointer_tag[KASAN_NR_FREE_STACKS]; |
188 | u8 free_track_idx; | |
189 | #endif | |
7ed2f9e6 AP |
190 | }; |
191 | ||
55834c59 AP |
192 | struct qlist_node { |
193 | struct qlist_node *next; | |
194 | }; | |
97593cad AK |
195 | |
196 | /* | |
fc0e5b91 AK |
197 | * Free meta is stored either in the object itself or in the redzone after the |
198 | * object. In the former case, free meta offset is 0. In the latter case, the | |
199 | * offset is between 0 and INT_MAX. INT_MAX marks that free meta is not present. | |
97593cad AK |
200 | */ |
201 | #define KASAN_NO_FREE_META INT_MAX | |
202 | ||
fc0e5b91 AK |
203 | /* |
204 | * Free meta is only used by Generic mode while the object is in quarantine. | |
205 | * After that, slab allocator stores the freelist pointer in the object. | |
206 | */ | |
7ed2f9e6 | 207 | struct kasan_free_meta { |
97593cad | 208 | #ifdef CONFIG_KASAN_GENERIC |
55834c59 | 209 | struct qlist_node quarantine_link; |
e4b7818b WW |
210 | struct kasan_track free_track; |
211 | #endif | |
7ed2f9e6 AP |
212 | }; |
213 | ||
49d9977a AK |
214 | #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) |
215 | /* Used in KUnit-compatible KASAN tests. */ | |
216 | struct kunit_kasan_status { | |
217 | bool report_found; | |
218 | bool sync_fault; | |
219 | }; | |
220 | #endif | |
221 | ||
6476792f AK |
222 | struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache, |
223 | const void *object); | |
97593cad | 224 | #ifdef CONFIG_KASAN_GENERIC |
6476792f AK |
225 | struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache, |
226 | const void *object); | |
97593cad | 227 | #endif |
7ed2f9e6 | 228 | |
2e903b91 AK |
229 | #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
230 | ||
0b24becc AR |
231 | static inline const void *kasan_shadow_to_mem(const void *shadow_addr) |
232 | { | |
233 | return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET) | |
234 | << KASAN_SHADOW_SCALE_SHIFT); | |
235 | } | |
236 | ||
6882464f | 237 | static inline bool addr_has_metadata(const void *addr) |
11cd3cd6 | 238 | { |
9d7b7dd9 AK |
239 | return (kasan_reset_tag(addr) >= |
240 | kasan_shadow_to_mem((void *)KASAN_SHADOW_START)); | |
11cd3cd6 AK |
241 | } |
242 | ||
b5f6e0fc | 243 | /** |
f00748bf | 244 | * kasan_check_range - Check memory region, and report if invalid access. |
b5f6e0fc ME |
245 | * @addr: the accessed address |
246 | * @size: the accessed size | |
247 | * @write: true if access is a write access | |
248 | * @ret_ip: return address | |
249 | * @return: true if access was valid, false if invalid | |
250 | */ | |
f00748bf | 251 | bool kasan_check_range(unsigned long addr, size_t size, bool write, |
bffa986c AK |
252 | unsigned long ret_ip); |
253 | ||
2e903b91 AK |
254 | #else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ |
255 | ||
256 | static inline bool addr_has_metadata(const void *addr) | |
257 | { | |
b99acdcb | 258 | return (is_vmalloc_addr(addr) || virt_addr_valid(addr)); |
2e903b91 AK |
259 | } |
260 | ||
261 | #endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ | |
262 | ||
d8dd3971 | 263 | #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) |
f00748bf | 264 | void kasan_print_tags(u8 addr_tag, const void *addr); |
d8dd3971 | 265 | #else |
f00748bf | 266 | static inline void kasan_print_tags(u8 addr_tag, const void *addr) { } |
d8dd3971 AK |
267 | #endif |
268 | ||
f00748bf | 269 | void *kasan_find_first_bad_addr(void *addr, size_t size); |
c965cdd6 | 270 | const char *kasan_get_bug_type(struct kasan_report_info *info); |
f00748bf | 271 | void kasan_metadata_fetch_row(char *buffer, void *row); |
11cd3cd6 | 272 | |
1e0f611f | 273 | #if defined(CONFIG_KASAN_STACK) |
f00748bf | 274 | void kasan_print_address_stack_frame(const void *addr); |
97fc7122 | 275 | #else |
f00748bf | 276 | static inline void kasan_print_address_stack_frame(const void *addr) { } |
97fc7122 AK |
277 | #endif |
278 | ||
8cceeff4 | 279 | bool kasan_report(unsigned long addr, size_t size, |
0b24becc | 280 | bool is_write, unsigned long ip); |
3de0de75 | 281 | void kasan_report_invalid_free(void *object, unsigned long ip, enum kasan_report_type type); |
0b24becc | 282 | |
ae8f06b3 | 283 | struct page *kasan_addr_to_page(const void *addr); |
6e48a966 | 284 | struct slab *kasan_addr_to_slab(const void *addr); |
ae8f06b3 | 285 | |
7594b347 | 286 | depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc); |
e4b7818b | 287 | void kasan_set_track(struct kasan_track *track, gfp_t flags); |
ccf643e6 | 288 | void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags); |
c249f9af | 289 | void kasan_save_free_info(struct kmem_cache *cache, void *object, u8 tag); |
e4b7818b WW |
290 | struct kasan_track *kasan_get_free_track(struct kmem_cache *cache, |
291 | void *object, u8 tag); | |
26e760c9 | 292 | |
2bd926b4 AK |
293 | #if defined(CONFIG_KASAN_GENERIC) && \ |
294 | (defined(CONFIG_SLAB) || defined(CONFIG_SLUB)) | |
f00748bf AK |
295 | bool kasan_quarantine_put(struct kmem_cache *cache, void *object); |
296 | void kasan_quarantine_reduce(void); | |
297 | void kasan_quarantine_remove_cache(struct kmem_cache *cache); | |
55834c59 | 298 | #else |
f00748bf AK |
299 | static inline bool kasan_quarantine_put(struct kmem_cache *cache, void *object) { return false; } |
300 | static inline void kasan_quarantine_reduce(void) { } | |
301 | static inline void kasan_quarantine_remove_cache(struct kmem_cache *cache) { } | |
55834c59 AP |
302 | #endif |
303 | ||
3c9e3aa1 | 304 | #ifndef arch_kasan_set_tag |
c412a769 QC |
305 | static inline const void *arch_kasan_set_tag(const void *addr, u8 tag) |
306 | { | |
307 | return addr; | |
308 | } | |
3c9e3aa1 | 309 | #endif |
3c9e3aa1 AK |
310 | #ifndef arch_kasan_get_tag |
311 | #define arch_kasan_get_tag(addr) 0 | |
312 | #endif | |
313 | ||
314 | #define set_tag(addr, tag) ((void *)arch_kasan_set_tag((addr), (tag))) | |
3c9e3aa1 AK |
315 | #define get_tag(addr) arch_kasan_get_tag(addr) |
316 | ||
ccbe2aab AK |
317 | #ifdef CONFIG_KASAN_HW_TAGS |
318 | ||
2603f8a7 VF |
319 | #ifndef arch_enable_tagging_sync |
320 | #define arch_enable_tagging_sync() | |
321 | #endif | |
322 | #ifndef arch_enable_tagging_async | |
323 | #define arch_enable_tagging_async() | |
ccbe2aab | 324 | #endif |
2d27e585 VF |
325 | #ifndef arch_enable_tagging_asymm |
326 | #define arch_enable_tagging_asymm() | |
327 | #endif | |
e80a76aa AK |
328 | #ifndef arch_force_async_tag_fault |
329 | #define arch_force_async_tag_fault() | |
330 | #endif | |
ccbe2aab AK |
331 | #ifndef arch_get_random_tag |
332 | #define arch_get_random_tag() (0xFF) | |
333 | #endif | |
334 | #ifndef arch_get_mem_tag | |
335 | #define arch_get_mem_tag(addr) (0xFF) | |
336 | #endif | |
337 | #ifndef arch_set_mem_tag_range | |
d9b6f907 | 338 | #define arch_set_mem_tag_range(addr, size, tag, init) ((void *)(addr)) |
ccbe2aab AK |
339 | #endif |
340 | ||
2603f8a7 VF |
341 | #define hw_enable_tagging_sync() arch_enable_tagging_sync() |
342 | #define hw_enable_tagging_async() arch_enable_tagging_async() | |
2d27e585 | 343 | #define hw_enable_tagging_asymm() arch_enable_tagging_asymm() |
e80a76aa | 344 | #define hw_force_async_tag_fault() arch_force_async_tag_fault() |
ccbe2aab AK |
345 | #define hw_get_random_tag() arch_get_random_tag() |
346 | #define hw_get_mem_tag(addr) arch_get_mem_tag(addr) | |
d9b6f907 AK |
347 | #define hw_set_mem_tag_range(addr, size, tag, init) \ |
348 | arch_set_mem_tag_range((addr), (size), (tag), (init)) | |
ccbe2aab | 349 | |
b1add418 VF |
350 | void kasan_enable_tagging(void); |
351 | ||
f05842cf AK |
352 | #else /* CONFIG_KASAN_HW_TAGS */ |
353 | ||
2603f8a7 VF |
354 | #define hw_enable_tagging_sync() |
355 | #define hw_enable_tagging_async() | |
2d27e585 | 356 | #define hw_enable_tagging_asymm() |
f05842cf | 357 | |
b1add418 VF |
358 | static inline void kasan_enable_tagging(void) { } |
359 | ||
ccbe2aab AK |
360 | #endif /* CONFIG_KASAN_HW_TAGS */ |
361 | ||
f05842cf AK |
362 | #if defined(CONFIG_KASAN_HW_TAGS) && IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) |
363 | ||
e80a76aa | 364 | void kasan_force_async_fault(void); |
f05842cf | 365 | |
b1add418 | 366 | #else /* CONFIG_KASAN_HW_TAGS && CONFIG_KASAN_KUNIT_TEST */ |
f05842cf | 367 | |
e80a76aa | 368 | static inline void kasan_force_async_fault(void) { } |
f05842cf | 369 | |
b1add418 | 370 | #endif /* CONFIG_KASAN_HW_TAGS && CONFIG_KASAN_KUNIT_TEST */ |
f05842cf | 371 | |
d8dd3971 | 372 | #ifdef CONFIG_KASAN_SW_TAGS |
f00748bf | 373 | u8 kasan_random_tag(void); |
d8dd3971 | 374 | #elif defined(CONFIG_KASAN_HW_TAGS) |
f00748bf | 375 | static inline u8 kasan_random_tag(void) { return hw_get_random_tag(); } |
d8dd3971 | 376 | #else |
f00748bf | 377 | static inline u8 kasan_random_tag(void) { return 0; } |
d8dd3971 AK |
378 | #endif |
379 | ||
57345fa6 AK |
380 | #ifdef CONFIG_KASAN_HW_TAGS |
381 | ||
aa5c219c | 382 | static inline void kasan_poison(const void *addr, size_t size, u8 value, bool init) |
57345fa6 | 383 | { |
cde8a7eb | 384 | addr = kasan_reset_tag(addr); |
2b830526 AP |
385 | |
386 | /* Skip KFENCE memory if called explicitly outside of sl*b. */ | |
cde8a7eb | 387 | if (is_kfence_address(addr)) |
2b830526 AP |
388 | return; |
389 | ||
cde8a7eb AK |
390 | if (WARN_ON((unsigned long)addr & KASAN_GRANULE_MASK)) |
391 | return; | |
392 | if (WARN_ON(size & KASAN_GRANULE_MASK)) | |
393 | return; | |
394 | ||
aa5c219c | 395 | hw_set_mem_tag_range((void *)addr, size, value, init); |
57345fa6 AK |
396 | } |
397 | ||
aa5c219c | 398 | static inline void kasan_unpoison(const void *addr, size_t size, bool init) |
57345fa6 | 399 | { |
cde8a7eb | 400 | u8 tag = get_tag(addr); |
2b830526 | 401 | |
cde8a7eb | 402 | addr = kasan_reset_tag(addr); |
2b830526 AP |
403 | |
404 | /* Skip KFENCE memory if called explicitly outside of sl*b. */ | |
cde8a7eb AK |
405 | if (is_kfence_address(addr)) |
406 | return; | |
407 | ||
408 | if (WARN_ON((unsigned long)addr & KASAN_GRANULE_MASK)) | |
2b830526 | 409 | return; |
77a63c69 YL |
410 | /* |
411 | * Explicitly initialize the memory with the precise object size to | |
fc0e5b91 AK |
412 | * avoid overwriting the slab redzone. This disables initialization in |
413 | * the arch code and may thus lead to performance penalty. This penalty | |
414 | * does not affect production builds, as slab redzones are not enabled | |
415 | * there. | |
77a63c69 YL |
416 | */ |
417 | if (__slub_debug_enabled() && | |
418 | init && ((unsigned long)size & KASAN_GRANULE_MASK)) { | |
419 | init = false; | |
420 | memzero_explicit((void *)addr, size); | |
421 | } | |
cde8a7eb | 422 | size = round_up(size, KASAN_GRANULE_SIZE); |
2b830526 | 423 | |
aa5c219c | 424 | hw_set_mem_tag_range((void *)addr, size, tag, init); |
57345fa6 AK |
425 | } |
426 | ||
611806b4 | 427 | static inline bool kasan_byte_accessible(const void *addr) |
57345fa6 AK |
428 | { |
429 | u8 ptr_tag = get_tag(addr); | |
611806b4 | 430 | u8 mem_tag = hw_get_mem_tag((void *)addr); |
57345fa6 | 431 | |
bfcfe371 | 432 | return ptr_tag == KASAN_TAG_KERNEL || ptr_tag == mem_tag; |
57345fa6 AK |
433 | } |
434 | ||
435 | #else /* CONFIG_KASAN_HW_TAGS */ | |
436 | ||
e2db1a9a | 437 | /** |
f0953a1b | 438 | * kasan_poison - mark the memory range as inaccessible |
e2db1a9a | 439 | * @addr - range start address, must be aligned to KASAN_GRANULE_SIZE |
cde8a7eb | 440 | * @size - range size, must be aligned to KASAN_GRANULE_SIZE |
e2db1a9a | 441 | * @value - value that's written to metadata for the range |
aa5c219c | 442 | * @init - whether to initialize the memory range (only for hardware tag-based) |
e2db1a9a AK |
443 | * |
444 | * The size gets aligned to KASAN_GRANULE_SIZE before marking the range. | |
445 | */ | |
aa5c219c | 446 | void kasan_poison(const void *addr, size_t size, u8 value, bool init); |
e2db1a9a AK |
447 | |
448 | /** | |
449 | * kasan_unpoison - mark the memory range as accessible | |
450 | * @addr - range start address, must be aligned to KASAN_GRANULE_SIZE | |
cde8a7eb | 451 | * @size - range size, can be unaligned |
aa5c219c | 452 | * @init - whether to initialize the memory range (only for hardware tag-based) |
e2db1a9a AK |
453 | * |
454 | * For the tag-based modes, the @size gets aligned to KASAN_GRANULE_SIZE before | |
455 | * marking the range. | |
456 | * For the generic mode, the last granule of the memory range gets partially | |
457 | * unpoisoned based on the @size. | |
458 | */ | |
aa5c219c | 459 | void kasan_unpoison(const void *addr, size_t size, bool init); |
e2db1a9a | 460 | |
611806b4 | 461 | bool kasan_byte_accessible(const void *addr); |
57345fa6 AK |
462 | |
463 | #endif /* CONFIG_KASAN_HW_TAGS */ | |
464 | ||
e2db1a9a AK |
465 | #ifdef CONFIG_KASAN_GENERIC |
466 | ||
467 | /** | |
468 | * kasan_poison_last_granule - mark the last granule of the memory range as | |
f0953a1b | 469 | * inaccessible |
e2db1a9a AK |
470 | * @addr - range start address, must be aligned to KASAN_GRANULE_SIZE |
471 | * @size - range size | |
472 | * | |
473 | * This function is only available for the generic mode, as it's the only mode | |
474 | * that has partially poisoned memory granules. | |
475 | */ | |
476 | void kasan_poison_last_granule(const void *address, size_t size); | |
477 | ||
478 | #else /* CONFIG_KASAN_GENERIC */ | |
479 | ||
480 | static inline void kasan_poison_last_granule(const void *address, size_t size) { } | |
481 | ||
482 | #endif /* CONFIG_KASAN_GENERIC */ | |
483 | ||
af3751f3 DA |
484 | #ifndef kasan_arch_is_ready |
485 | static inline bool kasan_arch_is_ready(void) { return true; } | |
486 | #elif !defined(CONFIG_KASAN_GENERIC) || !defined(CONFIG_KASAN_OUTLINE) | |
487 | #error kasan_arch_is_ready only works in KASAN generic outline mode! | |
488 | #endif | |
489 | ||
80207910 AK |
490 | #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) || IS_ENABLED(CONFIG_KASAN_MODULE_TEST) |
491 | ||
492 | bool kasan_save_enable_multi_shot(void); | |
493 | void kasan_restore_multi_shot(bool enabled); | |
494 | ||
495 | #endif | |
496 | ||
d321599c AP |
497 | /* |
498 | * Exported functions for interfaces called from assembly or from generated | |
fc0e5b91 | 499 | * code. Declared here to avoid warnings about missing declarations. |
d321599c | 500 | */ |
fc0e5b91 | 501 | |
d321599c AP |
502 | asmlinkage void kasan_unpoison_task_stack_below(const void *watermark); |
503 | void __asan_register_globals(struct kasan_global *globals, size_t size); | |
504 | void __asan_unregister_globals(struct kasan_global *globals, size_t size); | |
d321599c | 505 | void __asan_handle_no_return(void); |
d321599c AP |
506 | void __asan_alloca_poison(unsigned long addr, size_t size); |
507 | void __asan_allocas_unpoison(const void *stack_top, const void *stack_bottom); | |
508 | ||
509 | void __asan_load1(unsigned long addr); | |
510 | void __asan_store1(unsigned long addr); | |
511 | void __asan_load2(unsigned long addr); | |
512 | void __asan_store2(unsigned long addr); | |
513 | void __asan_load4(unsigned long addr); | |
514 | void __asan_store4(unsigned long addr); | |
515 | void __asan_load8(unsigned long addr); | |
516 | void __asan_store8(unsigned long addr); | |
517 | void __asan_load16(unsigned long addr); | |
518 | void __asan_store16(unsigned long addr); | |
13cf0488 AK |
519 | void __asan_loadN(unsigned long addr, size_t size); |
520 | void __asan_storeN(unsigned long addr, size_t size); | |
d321599c AP |
521 | |
522 | void __asan_load1_noabort(unsigned long addr); | |
523 | void __asan_store1_noabort(unsigned long addr); | |
524 | void __asan_load2_noabort(unsigned long addr); | |
525 | void __asan_store2_noabort(unsigned long addr); | |
526 | void __asan_load4_noabort(unsigned long addr); | |
527 | void __asan_store4_noabort(unsigned long addr); | |
528 | void __asan_load8_noabort(unsigned long addr); | |
529 | void __asan_store8_noabort(unsigned long addr); | |
530 | void __asan_load16_noabort(unsigned long addr); | |
531 | void __asan_store16_noabort(unsigned long addr); | |
13cf0488 AK |
532 | void __asan_loadN_noabort(unsigned long addr, size_t size); |
533 | void __asan_storeN_noabort(unsigned long addr, size_t size); | |
534 | ||
535 | void __asan_report_load1_noabort(unsigned long addr); | |
536 | void __asan_report_store1_noabort(unsigned long addr); | |
537 | void __asan_report_load2_noabort(unsigned long addr); | |
538 | void __asan_report_store2_noabort(unsigned long addr); | |
539 | void __asan_report_load4_noabort(unsigned long addr); | |
540 | void __asan_report_store4_noabort(unsigned long addr); | |
541 | void __asan_report_load8_noabort(unsigned long addr); | |
542 | void __asan_report_store8_noabort(unsigned long addr); | |
543 | void __asan_report_load16_noabort(unsigned long addr); | |
544 | void __asan_report_store16_noabort(unsigned long addr); | |
545 | void __asan_report_load_n_noabort(unsigned long addr, size_t size); | |
546 | void __asan_report_store_n_noabort(unsigned long addr, size_t size); | |
d321599c AP |
547 | |
548 | void __asan_set_shadow_00(const void *addr, size_t size); | |
549 | void __asan_set_shadow_f1(const void *addr, size_t size); | |
550 | void __asan_set_shadow_f2(const void *addr, size_t size); | |
551 | void __asan_set_shadow_f3(const void *addr, size_t size); | |
552 | void __asan_set_shadow_f5(const void *addr, size_t size); | |
553 | void __asan_set_shadow_f8(const void *addr, size_t size); | |
554 | ||
13cf0488 AK |
555 | void __hwasan_load1_noabort(unsigned long addr); |
556 | void __hwasan_store1_noabort(unsigned long addr); | |
557 | void __hwasan_load2_noabort(unsigned long addr); | |
558 | void __hwasan_store2_noabort(unsigned long addr); | |
559 | void __hwasan_load4_noabort(unsigned long addr); | |
560 | void __hwasan_store4_noabort(unsigned long addr); | |
561 | void __hwasan_load8_noabort(unsigned long addr); | |
562 | void __hwasan_store8_noabort(unsigned long addr); | |
563 | void __hwasan_load16_noabort(unsigned long addr); | |
564 | void __hwasan_store16_noabort(unsigned long addr); | |
565 | void __hwasan_loadN_noabort(unsigned long addr, size_t size); | |
566 | void __hwasan_storeN_noabort(unsigned long addr, size_t size); | |
567 | ||
568 | void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size); | |
569 | ||
fc0e5b91 | 570 | #endif /* __MM_KASAN_KASAN_H */ |