kasan.h (7fae3dd08e3e88491f06e22e648913e3f8cf30f0) kasan.h (59e6e098d1c156f7c449af903c3b48a5470f6120)
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __MM_KASAN_KASAN_H
3#define __MM_KASAN_KASAN_H
4
5#include <linux/kasan.h>
6#include <linux/kasan-tags.h>
7#include <linux/kfence.h>
8#include <linux/stackdepot.h>

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141
142/* Metadata layout customization. */
143#define META_BYTES_PER_BLOCK 1
144#define META_BLOCKS_PER_ROW 16
145#define META_BYTES_PER_ROW (META_BLOCKS_PER_ROW * META_BYTES_PER_BLOCK)
146#define META_MEM_BYTES_PER_ROW (META_BYTES_PER_ROW * KASAN_GRANULE_SIZE)
147#define META_ROWS_AROUND_ADDR 2
148
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __MM_KASAN_KASAN_H
3#define __MM_KASAN_KASAN_H
4
5#include <linux/kasan.h>
6#include <linux/kasan-tags.h>
7#include <linux/kfence.h>
8#include <linux/stackdepot.h>

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141
142/* Metadata layout customization. */
143#define META_BYTES_PER_BLOCK 1
144#define META_BLOCKS_PER_ROW 16
145#define META_BYTES_PER_ROW (META_BLOCKS_PER_ROW * META_BYTES_PER_BLOCK)
146#define META_MEM_BYTES_PER_ROW (META_BYTES_PER_ROW * KASAN_GRANULE_SIZE)
147#define META_ROWS_AROUND_ADDR 2
148
149#define KASAN_STACK_DEPTH 64
150
151struct kasan_track {
152 u32 pid;
153 depot_stack_handle_t stack;
154};
155
149enum kasan_report_type {
150 KASAN_REPORT_ACCESS,
151 KASAN_REPORT_INVALID_FREE,
152 KASAN_REPORT_DOUBLE_FREE,
153};
154
155struct kasan_report_info {
156 /* Filled in by kasan_report_*(). */
157 enum kasan_report_type type;
158 void *access_addr;
159 size_t access_size;
160 bool is_write;
161 unsigned long ip;
162
163 /* Filled in by the common reporting code. */
164 void *first_bad_addr;
165 struct kmem_cache *cache;
166 void *object;
156enum kasan_report_type {
157 KASAN_REPORT_ACCESS,
158 KASAN_REPORT_INVALID_FREE,
159 KASAN_REPORT_DOUBLE_FREE,
160};
161
162struct kasan_report_info {
163 /* Filled in by kasan_report_*(). */
164 enum kasan_report_type type;
165 void *access_addr;
166 size_t access_size;
167 bool is_write;
168 unsigned long ip;
169
170 /* Filled in by the common reporting code. */
171 void *first_bad_addr;
172 struct kmem_cache *cache;
173 void *object;
174
175 /* Filled in by the mode-specific reporting code. */
176 const char *bug_type;
177 struct kasan_track alloc_track;
178 struct kasan_track free_track;
167};
168
169/* Do not change the struct layout: compiler ABI. */
170struct kasan_source_location {
171 const char *filename;
172 int line_no;
173 int column_no;
174};

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184#if KASAN_ABI_VERSION >= 4
185 struct kasan_source_location *location;
186#endif
187#if KASAN_ABI_VERSION >= 5
188 char *odr_indicator;
189#endif
190};
191
179};
180
181/* Do not change the struct layout: compiler ABI. */
182struct kasan_source_location {
183 const char *filename;
184 int line_no;
185 int column_no;
186};

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196#if KASAN_ABI_VERSION >= 4
197 struct kasan_source_location *location;
198#endif
199#if KASAN_ABI_VERSION >= 5
200 char *odr_indicator;
201#endif
202};
203
192/* Structures for keeping alloc and free tracks. */
204/* Structures for keeping alloc and free meta. */
193
205
194#define KASAN_STACK_DEPTH 64
195
196struct kasan_track {
197 u32 pid;
198 depot_stack_handle_t stack;
199};
200
201#ifdef CONFIG_KASAN_GENERIC
202
203struct kasan_alloc_meta {
204 struct kasan_track alloc_track;
205 /* Free track is stored in kasan_free_meta. */
206 depot_stack_handle_t aux_stack[2];
207};
208

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265
266static inline bool addr_has_metadata(const void *addr)
267{
268 return (is_vmalloc_addr(addr) || virt_addr_valid(addr));
269}
270
271#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
272
206#ifdef CONFIG_KASAN_GENERIC
207
208struct kasan_alloc_meta {
209 struct kasan_track alloc_track;
210 /* Free track is stored in kasan_free_meta. */
211 depot_stack_handle_t aux_stack[2];
212};
213

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270
271static inline bool addr_has_metadata(const void *addr)
272{
273 return (is_vmalloc_addr(addr) || virt_addr_valid(addr));
274}
275
276#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
277
278void *kasan_find_first_bad_addr(void *addr, size_t size);
279void kasan_complete_mode_report_info(struct kasan_report_info *info);
280void kasan_metadata_fetch_row(char *buffer, void *row);
281
273#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
274void kasan_print_tags(u8 addr_tag, const void *addr);
275#else
276static inline void kasan_print_tags(u8 addr_tag, const void *addr) { }
277#endif
278
282#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
283void kasan_print_tags(u8 addr_tag, const void *addr);
284#else
285static inline void kasan_print_tags(u8 addr_tag, const void *addr) { }
286#endif
287
279void *kasan_find_first_bad_addr(void *addr, size_t size);
280const char *kasan_get_bug_type(struct kasan_report_info *info);
281void kasan_metadata_fetch_row(char *buffer, void *row);
282
283#if defined(CONFIG_KASAN_STACK)
284void kasan_print_address_stack_frame(const void *addr);
285#else
286static inline void kasan_print_address_stack_frame(const void *addr) { }
287#endif
288
289#ifdef CONFIG_KASAN_GENERIC
290void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object);

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309static inline void kasan_init_cache_meta(struct kmem_cache *cache, unsigned int *size) { }
310static inline void kasan_init_object_meta(struct kmem_cache *cache, const void *object) { }
311#endif
312
313depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc);
314void kasan_set_track(struct kasan_track *track, gfp_t flags);
315void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags);
316void kasan_save_free_info(struct kmem_cache *cache, void *object);
288#if defined(CONFIG_KASAN_STACK)
289void kasan_print_address_stack_frame(const void *addr);
290#else
291static inline void kasan_print_address_stack_frame(const void *addr) { }
292#endif
293
294#ifdef CONFIG_KASAN_GENERIC
295void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object);

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314static inline void kasan_init_cache_meta(struct kmem_cache *cache, unsigned int *size) { }
315static inline void kasan_init_object_meta(struct kmem_cache *cache, const void *object) { }
316#endif
317
318depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc);
319void kasan_set_track(struct kasan_track *track, gfp_t flags);
320void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags);
321void kasan_save_free_info(struct kmem_cache *cache, void *object);
317struct kasan_track *kasan_get_alloc_track(struct kmem_cache *cache,
318 void *object);
319struct kasan_track *kasan_get_free_track(struct kmem_cache *cache,
320 void *object, u8 tag);
321
322#if defined(CONFIG_KASAN_GENERIC) && \
323 (defined(CONFIG_SLAB) || defined(CONFIG_SLUB))
324bool kasan_quarantine_put(struct kmem_cache *cache, void *object);
325void kasan_quarantine_reduce(void);
326void kasan_quarantine_remove_cache(struct kmem_cache *cache);
327#else
328static inline bool kasan_quarantine_put(struct kmem_cache *cache, void *object) { return false; }

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323#if defined(CONFIG_KASAN_GENERIC) && \
324 (defined(CONFIG_SLAB) || defined(CONFIG_SLUB))
325bool kasan_quarantine_put(struct kmem_cache *cache, void *object);
326void kasan_quarantine_reduce(void);
327void kasan_quarantine_remove_cache(struct kmem_cache *cache);
328#else
329static inline bool kasan_quarantine_put(struct kmem_cache *cache, void *object) { return false; }

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