1  /* SPDX-License-Identifier: GPL-2.0 */
2  #ifndef __MM_KASAN_KASAN_H
3  #define __MM_KASAN_KASAN_H
4  
5  #include <linux/atomic.h>
6  #include <linux/kasan.h>
7  #include <linux/kasan-tags.h>
8  #include <linux/kfence.h>
9  #include <linux/stackdepot.h>
10  
11  #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
12  
13  #include <linux/static_key.h>
14  
15  DECLARE_STATIC_KEY_TRUE(kasan_flag_stacktrace);
16  
kasan_stack_collection_enabled(void)17  static inline bool kasan_stack_collection_enabled(void)
18  {
19  	return static_branch_unlikely(&kasan_flag_stacktrace);
20  }
21  
22  #else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
23  
kasan_stack_collection_enabled(void)24  static inline bool kasan_stack_collection_enabled(void)
25  {
26  	return true;
27  }
28  
29  #endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
30  
31  #ifdef CONFIG_KASAN_HW_TAGS
32  
33  #include "../slab.h"
34  
35  DECLARE_STATIC_KEY_TRUE(kasan_flag_vmalloc);
36  
37  enum kasan_mode {
38  	KASAN_MODE_SYNC,
39  	KASAN_MODE_ASYNC,
40  	KASAN_MODE_ASYMM,
41  };
42  
43  extern enum kasan_mode kasan_mode __ro_after_init;
44  
45  extern unsigned long kasan_page_alloc_sample;
46  extern unsigned int kasan_page_alloc_sample_order;
47  DECLARE_PER_CPU(long, kasan_page_alloc_skip);
48  
kasan_vmalloc_enabled(void)49  static inline bool kasan_vmalloc_enabled(void)
50  {
51  	/* Static branch is never enabled with CONFIG_KASAN_VMALLOC disabled. */
52  	return static_branch_likely(&kasan_flag_vmalloc);
53  }
54  
kasan_async_fault_possible(void)55  static inline bool kasan_async_fault_possible(void)
56  {
57  	return kasan_mode == KASAN_MODE_ASYNC || kasan_mode == KASAN_MODE_ASYMM;
58  }
59  
kasan_sync_fault_possible(void)60  static inline bool kasan_sync_fault_possible(void)
61  {
62  	return kasan_mode == KASAN_MODE_SYNC || kasan_mode == KASAN_MODE_ASYMM;
63  }
64  
kasan_sample_page_alloc(unsigned int order)65  static inline bool kasan_sample_page_alloc(unsigned int order)
66  {
67  	/* Fast-path for when sampling is disabled. */
68  	if (kasan_page_alloc_sample == 1)
69  		return true;
70  
71  	if (order < kasan_page_alloc_sample_order)
72  		return true;
73  
74  	if (this_cpu_dec_return(kasan_page_alloc_skip) < 0) {
75  		this_cpu_write(kasan_page_alloc_skip,
76  			       kasan_page_alloc_sample - 1);
77  		return true;
78  	}
79  
80  	return false;
81  }
82  
83  #else /* CONFIG_KASAN_HW_TAGS */
84  
kasan_vmalloc_enabled(void)85  static inline bool kasan_vmalloc_enabled(void)
86  {
87  	return IS_ENABLED(CONFIG_KASAN_VMALLOC);
88  }
89  
kasan_async_fault_possible(void)90  static inline bool kasan_async_fault_possible(void)
91  {
92  	return false;
93  }
94  
kasan_sync_fault_possible(void)95  static inline bool kasan_sync_fault_possible(void)
96  {
97  	return true;
98  }
99  
kasan_sample_page_alloc(unsigned int order)100  static inline bool kasan_sample_page_alloc(unsigned int order)
101  {
102  	return true;
103  }
104  
105  #endif /* CONFIG_KASAN_HW_TAGS */
106  
107  #ifdef CONFIG_KASAN_GENERIC
108  
109  /*
110   * Generic KASAN uses per-object metadata to store alloc and free stack traces
111   * and the quarantine link.
112   */
kasan_requires_meta(void)113  static inline bool kasan_requires_meta(void)
114  {
115  	return true;
116  }
117  
118  #else /* CONFIG_KASAN_GENERIC */
119  
120  /*
121   * Tag-based KASAN modes do not use per-object metadata: they use the stack
122   * ring to store alloc and free stack traces and do not use qurantine.
123   */
kasan_requires_meta(void)124  static inline bool kasan_requires_meta(void)
125  {
126  	return false;
127  }
128  
129  #endif /* CONFIG_KASAN_GENERIC */
130  
131  #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
132  #define KASAN_GRANULE_SIZE	(1UL << KASAN_SHADOW_SCALE_SHIFT)
133  #else
134  #include <asm/mte-kasan.h>
135  #define KASAN_GRANULE_SIZE	MTE_GRANULE_SIZE
136  #endif
137  
138  #define KASAN_GRANULE_MASK	(KASAN_GRANULE_SIZE - 1)
139  
140  #define KASAN_MEMORY_PER_SHADOW_PAGE	(KASAN_GRANULE_SIZE << PAGE_SHIFT)
141  
142  #ifdef CONFIG_KASAN_GENERIC
143  #define KASAN_PAGE_FREE		0xFF  /* freed page */
144  #define KASAN_PAGE_REDZONE	0xFE  /* redzone for kmalloc_large allocation */
145  #define KASAN_SLAB_REDZONE	0xFC  /* redzone for slab object */
146  #define KASAN_SLAB_FREE		0xFB  /* freed slab object */
147  #define KASAN_VMALLOC_INVALID	0xF8  /* inaccessible space in vmap area */
148  #else
149  #define KASAN_PAGE_FREE		KASAN_TAG_INVALID
150  #define KASAN_PAGE_REDZONE	KASAN_TAG_INVALID
151  #define KASAN_SLAB_REDZONE	KASAN_TAG_INVALID
152  #define KASAN_SLAB_FREE		KASAN_TAG_INVALID
153  #define KASAN_VMALLOC_INVALID	KASAN_TAG_INVALID /* only used for SW_TAGS */
154  #endif
155  
156  #ifdef CONFIG_KASAN_GENERIC
157  
158  #define KASAN_SLAB_FREE_META	0xFA  /* freed slab object with free meta */
159  #define KASAN_GLOBAL_REDZONE	0xF9  /* redzone for global variable */
160  
161  /* Stack redzone shadow values. Compiler ABI, do not change. */
162  #define KASAN_STACK_LEFT	0xF1
163  #define KASAN_STACK_MID		0xF2
164  #define KASAN_STACK_RIGHT	0xF3
165  #define KASAN_STACK_PARTIAL	0xF4
166  
167  /* alloca redzone shadow values. */
168  #define KASAN_ALLOCA_LEFT	0xCA
169  #define KASAN_ALLOCA_RIGHT	0xCB
170  
171  /* alloca redzone size. Compiler ABI, do not change. */
172  #define KASAN_ALLOCA_REDZONE_SIZE	32
173  
174  /* Stack frame marker. Compiler ABI, do not change. */
175  #define KASAN_CURRENT_STACK_FRAME_MAGIC 0x41B58AB3
176  
177  /* Dummy value to avoid breaking randconfig/all*config builds. */
178  #ifndef KASAN_ABI_VERSION
179  #define KASAN_ABI_VERSION 1
180  #endif
181  
182  #endif /* CONFIG_KASAN_GENERIC */
183  
184  /* Metadata layout customization. */
185  #define META_BYTES_PER_BLOCK 1
186  #define META_BLOCKS_PER_ROW 16
187  #define META_BYTES_PER_ROW (META_BLOCKS_PER_ROW * META_BYTES_PER_BLOCK)
188  #define META_MEM_BYTES_PER_ROW (META_BYTES_PER_ROW * KASAN_GRANULE_SIZE)
189  #define META_ROWS_AROUND_ADDR 2
190  
191  #define KASAN_STACK_DEPTH 64
192  
193  struct kasan_track {
194  	u32 pid;
195  	depot_stack_handle_t stack;
196  #ifdef CONFIG_KASAN_EXTRA_INFO
197  	u64 cpu:20;
198  	u64 timestamp:44;
199  #endif /* CONFIG_KASAN_EXTRA_INFO */
200  };
201  
202  enum kasan_report_type {
203  	KASAN_REPORT_ACCESS,
204  	KASAN_REPORT_INVALID_FREE,
205  	KASAN_REPORT_DOUBLE_FREE,
206  };
207  
208  struct kasan_report_info {
209  	/* Filled in by kasan_report_*(). */
210  	enum kasan_report_type type;
211  	const void *access_addr;
212  	size_t access_size;
213  	bool is_write;
214  	unsigned long ip;
215  
216  	/* Filled in by the common reporting code. */
217  	const void *first_bad_addr;
218  	struct kmem_cache *cache;
219  	void *object;
220  	size_t alloc_size;
221  
222  	/* Filled in by the mode-specific reporting code. */
223  	const char *bug_type;
224  	struct kasan_track alloc_track;
225  	struct kasan_track free_track;
226  };
227  
228  /* Do not change the struct layout: compiler ABI. */
229  struct kasan_source_location {
230  	const char *filename;
231  	int line_no;
232  	int column_no;
233  };
234  
235  /* Do not change the struct layout: compiler ABI. */
236  struct kasan_global {
237  	const void *beg;		/* Address of the beginning of the global variable. */
238  	size_t size;			/* Size of the global variable. */
239  	size_t size_with_redzone;	/* Size of the variable + size of the redzone. 32 bytes aligned. */
240  	const void *name;
241  	const void *module_name;	/* Name of the module where the global variable is declared. */
242  	unsigned long has_dynamic_init;	/* This is needed for C++. */
243  #if KASAN_ABI_VERSION >= 4
244  	struct kasan_source_location *location;
245  #endif
246  #if KASAN_ABI_VERSION >= 5
247  	char *odr_indicator;
248  #endif
249  };
250  
251  /* Structures for keeping alloc and free meta. */
252  
253  #ifdef CONFIG_KASAN_GENERIC
254  
255  /*
256   * Alloc meta contains the allocation-related information about a slab object.
257   * Alloc meta is saved when an object is allocated and is kept until either the
258   * object returns to the slab freelist (leaves quarantine for quarantined
259   * objects or gets freed for the non-quarantined ones) or reallocated via
260   * krealloc or through a mempool.
261   * Alloc meta is stored inside of the object's redzone.
262   * Alloc meta is considered valid whenever it contains non-zero data.
263   */
264  struct kasan_alloc_meta {
265  	struct kasan_track alloc_track;
266  	/* Free track is stored in kasan_free_meta. */
267  	depot_stack_handle_t aux_stack[2];
268  };
269  
270  struct qlist_node {
271  	struct qlist_node *next;
272  };
273  
274  /*
275   * Free meta is stored either in the object itself or in the redzone after the
276   * object. In the former case, free meta offset is 0. In the latter case, the
277   * offset is between 0 and INT_MAX. INT_MAX marks that free meta is not present.
278   */
279  #define KASAN_NO_FREE_META INT_MAX
280  
281  /*
282   * Free meta contains the freeing-related information about a slab object.
283   * Free meta is only kept for quarantined objects and for mempool objects until
284   * the object gets allocated again.
285   * Free meta is stored within the object's memory.
286   * Free meta is considered valid whenever the value of the shadow byte that
287   * corresponds to the first 8 bytes of the object is KASAN_SLAB_FREE_META.
288   */
289  struct kasan_free_meta {
290  	struct qlist_node quarantine_link;
291  	struct kasan_track free_track;
292  };
293  
294  #endif /* CONFIG_KASAN_GENERIC */
295  
296  #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
297  
298  struct kasan_stack_ring_entry {
299  	void *ptr;
300  	size_t size;
301  	struct kasan_track track;
302  	bool is_free;
303  };
304  
305  struct kasan_stack_ring {
306  	rwlock_t lock;
307  	size_t size;
308  	atomic64_t pos;
309  	struct kasan_stack_ring_entry *entries;
310  };
311  
312  #endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
313  
314  #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
315  
addr_in_shadow(const void * addr)316  static __always_inline bool addr_in_shadow(const void *addr)
317  {
318  	return addr >= (void *)KASAN_SHADOW_START &&
319  		addr < (void *)KASAN_SHADOW_END;
320  }
321  
322  #ifndef kasan_shadow_to_mem
kasan_shadow_to_mem(const void * shadow_addr)323  static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
324  {
325  	return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET)
326  		<< KASAN_SHADOW_SCALE_SHIFT);
327  }
328  #endif
329  
330  #ifndef addr_has_metadata
addr_has_metadata(const void * addr)331  static __always_inline bool addr_has_metadata(const void *addr)
332  {
333  	return (kasan_reset_tag(addr) >=
334  		kasan_shadow_to_mem((void *)KASAN_SHADOW_START));
335  }
336  #endif
337  
338  /**
339   * kasan_check_range - Check memory region, and report if invalid access.
340   * @addr: the accessed address
341   * @size: the accessed size
342   * @write: true if access is a write access
343   * @ret_ip: return address
344   * @return: true if access was valid, false if invalid
345   */
346  bool kasan_check_range(const void *addr, size_t size, bool write,
347  				unsigned long ret_ip);
348  
349  #else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
350  
addr_has_metadata(const void * addr)351  static __always_inline bool addr_has_metadata(const void *addr)
352  {
353  	return (is_vmalloc_addr(addr) || virt_addr_valid(addr));
354  }
355  
356  #endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
357  
358  const void *kasan_find_first_bad_addr(const void *addr, size_t size);
359  size_t kasan_get_alloc_size(void *object, struct kmem_cache *cache);
360  void kasan_complete_mode_report_info(struct kasan_report_info *info);
361  void kasan_metadata_fetch_row(char *buffer, void *row);
362  
363  #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
364  void kasan_print_tags(u8 addr_tag, const void *addr);
365  #else
kasan_print_tags(u8 addr_tag,const void * addr)366  static inline void kasan_print_tags(u8 addr_tag, const void *addr) { }
367  #endif
368  
369  #if defined(CONFIG_KASAN_STACK)
370  void kasan_print_address_stack_frame(const void *addr);
371  #else
kasan_print_address_stack_frame(const void * addr)372  static inline void kasan_print_address_stack_frame(const void *addr) { }
373  #endif
374  
375  #ifdef CONFIG_KASAN_GENERIC
376  void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object);
377  #else
kasan_print_aux_stacks(struct kmem_cache * cache,const void * object)378  static inline void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object) { }
379  #endif
380  
381  bool kasan_report(const void *addr, size_t size,
382  		bool is_write, unsigned long ip);
383  void kasan_report_invalid_free(void *object, unsigned long ip, enum kasan_report_type type);
384  
385  struct slab *kasan_addr_to_slab(const void *addr);
386  
387  #ifdef CONFIG_KASAN_GENERIC
388  struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
389  						const void *object);
390  struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache,
391  						const void *object);
392  void kasan_init_object_meta(struct kmem_cache *cache, const void *object);
393  #else
kasan_init_object_meta(struct kmem_cache * cache,const void * object)394  static inline void kasan_init_object_meta(struct kmem_cache *cache, const void *object) { }
395  #endif
396  
397  depot_stack_handle_t kasan_save_stack(gfp_t flags, depot_flags_t depot_flags);
398  void kasan_set_track(struct kasan_track *track, depot_stack_handle_t stack);
399  void kasan_save_track(struct kasan_track *track, gfp_t flags);
400  void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags);
401  void kasan_save_free_info(struct kmem_cache *cache, void *object);
402  
403  #ifdef CONFIG_KASAN_GENERIC
404  bool kasan_quarantine_put(struct kmem_cache *cache, void *object);
405  void kasan_quarantine_reduce(void);
406  void kasan_quarantine_remove_cache(struct kmem_cache *cache);
407  #else
kasan_quarantine_put(struct kmem_cache * cache,void * object)408  static inline bool kasan_quarantine_put(struct kmem_cache *cache, void *object) { return false; }
kasan_quarantine_reduce(void)409  static inline void kasan_quarantine_reduce(void) { }
kasan_quarantine_remove_cache(struct kmem_cache * cache)410  static inline void kasan_quarantine_remove_cache(struct kmem_cache *cache) { }
411  #endif
412  
413  #ifndef arch_kasan_set_tag
arch_kasan_set_tag(const void * addr,u8 tag)414  static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
415  {
416  	return addr;
417  }
418  #endif
419  #ifndef arch_kasan_get_tag
420  #define arch_kasan_get_tag(addr)	0
421  #endif
422  
423  #define set_tag(addr, tag)	((void *)arch_kasan_set_tag((addr), (tag)))
424  #define get_tag(addr)		arch_kasan_get_tag(addr)
425  
426  #ifdef CONFIG_KASAN_HW_TAGS
427  
428  #define hw_enable_tag_checks_sync()		arch_enable_tag_checks_sync()
429  #define hw_enable_tag_checks_async()		arch_enable_tag_checks_async()
430  #define hw_enable_tag_checks_asymm()		arch_enable_tag_checks_asymm()
431  #define hw_suppress_tag_checks_start()		arch_suppress_tag_checks_start()
432  #define hw_suppress_tag_checks_stop()		arch_suppress_tag_checks_stop()
433  #define hw_force_async_tag_fault()		arch_force_async_tag_fault()
434  #define hw_get_random_tag()			arch_get_random_tag()
435  #define hw_get_mem_tag(addr)			arch_get_mem_tag(addr)
436  #define hw_set_mem_tag_range(addr, size, tag, init) \
437  			arch_set_mem_tag_range((addr), (size), (tag), (init))
438  
439  void kasan_enable_hw_tags(void);
440  
441  #else /* CONFIG_KASAN_HW_TAGS */
442  
kasan_enable_hw_tags(void)443  static inline void kasan_enable_hw_tags(void) { }
444  
445  #endif /* CONFIG_KASAN_HW_TAGS */
446  
447  #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
448  void __init kasan_init_tags(void);
449  #endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
450  
451  #if defined(CONFIG_KASAN_HW_TAGS) && IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
452  
453  void kasan_force_async_fault(void);
454  
455  #else /* CONFIG_KASAN_HW_TAGS && CONFIG_KASAN_KUNIT_TEST */
456  
kasan_force_async_fault(void)457  static inline void kasan_force_async_fault(void) { }
458  
459  #endif /* CONFIG_KASAN_HW_TAGS && CONFIG_KASAN_KUNIT_TEST */
460  
461  #ifdef CONFIG_KASAN_SW_TAGS
462  u8 kasan_random_tag(void);
463  #elif defined(CONFIG_KASAN_HW_TAGS)
kasan_random_tag(void)464  static inline u8 kasan_random_tag(void) { return hw_get_random_tag(); }
465  #else
kasan_random_tag(void)466  static inline u8 kasan_random_tag(void) { return 0; }
467  #endif
468  
469  #ifdef CONFIG_KASAN_HW_TAGS
470  
kasan_poison(const void * addr,size_t size,u8 value,bool init)471  static inline void kasan_poison(const void *addr, size_t size, u8 value, bool init)
472  {
473  	if (WARN_ON((unsigned long)addr & KASAN_GRANULE_MASK))
474  		return;
475  	if (WARN_ON(size & KASAN_GRANULE_MASK))
476  		return;
477  
478  	hw_set_mem_tag_range(kasan_reset_tag(addr), size, value, init);
479  }
480  
kasan_unpoison(const void * addr,size_t size,bool init)481  static inline void kasan_unpoison(const void *addr, size_t size, bool init)
482  {
483  	u8 tag = get_tag(addr);
484  
485  	if (WARN_ON((unsigned long)addr & KASAN_GRANULE_MASK))
486  		return;
487  	size = round_up(size, KASAN_GRANULE_SIZE);
488  
489  	hw_set_mem_tag_range(kasan_reset_tag(addr), size, tag, init);
490  }
491  
kasan_byte_accessible(const void * addr)492  static inline bool kasan_byte_accessible(const void *addr)
493  {
494  	u8 ptr_tag = get_tag(addr);
495  	u8 mem_tag = hw_get_mem_tag((void *)addr);
496  
497  	return ptr_tag == KASAN_TAG_KERNEL || ptr_tag == mem_tag;
498  }
499  
500  #else /* CONFIG_KASAN_HW_TAGS */
501  
502  /**
503   * kasan_poison - mark the memory range as inaccessible
504   * @addr - range start address, must be aligned to KASAN_GRANULE_SIZE
505   * @size - range size, must be aligned to KASAN_GRANULE_SIZE
506   * @value - value that's written to metadata for the range
507   * @init - whether to initialize the memory range (only for hardware tag-based)
508   */
509  void kasan_poison(const void *addr, size_t size, u8 value, bool init);
510  
511  /**
512   * kasan_unpoison - mark the memory range as accessible
513   * @addr - range start address, must be aligned to KASAN_GRANULE_SIZE
514   * @size - range size, can be unaligned
515   * @init - whether to initialize the memory range (only for hardware tag-based)
516   *
517   * For the tag-based modes, the @size gets aligned to KASAN_GRANULE_SIZE before
518   * marking the range.
519   * For the generic mode, the last granule of the memory range gets partially
520   * unpoisoned based on the @size.
521   */
522  void kasan_unpoison(const void *addr, size_t size, bool init);
523  
524  bool kasan_byte_accessible(const void *addr);
525  
526  #endif /* CONFIG_KASAN_HW_TAGS */
527  
528  #ifdef CONFIG_KASAN_GENERIC
529  
530  /**
531   * kasan_poison_last_granule - mark the last granule of the memory range as
532   * inaccessible
533   * @addr - range start address, must be aligned to KASAN_GRANULE_SIZE
534   * @size - range size
535   *
536   * This function is only available for the generic mode, as it's the only mode
537   * that has partially poisoned memory granules.
538   */
539  void kasan_poison_last_granule(const void *address, size_t size);
540  
541  #else /* CONFIG_KASAN_GENERIC */
542  
kasan_poison_last_granule(const void * address,size_t size)543  static inline void kasan_poison_last_granule(const void *address, size_t size) { }
544  
545  #endif /* CONFIG_KASAN_GENERIC */
546  
547  #ifndef kasan_arch_is_ready
kasan_arch_is_ready(void)548  static inline bool kasan_arch_is_ready(void)	{ return true; }
549  #elif !defined(CONFIG_KASAN_GENERIC) || !defined(CONFIG_KASAN_OUTLINE)
550  #error kasan_arch_is_ready only works in KASAN generic outline mode!
551  #endif
552  
553  #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
554  
555  void kasan_kunit_test_suite_start(void);
556  void kasan_kunit_test_suite_end(void);
557  
558  #ifdef CONFIG_RUST
559  char kasan_test_rust_uaf(void);
560  #else
kasan_test_rust_uaf(void)561  static inline char kasan_test_rust_uaf(void) { return '\0'; }
562  #endif
563  
564  #else /* CONFIG_KASAN_KUNIT_TEST */
565  
kasan_kunit_test_suite_start(void)566  static inline void kasan_kunit_test_suite_start(void) { }
kasan_kunit_test_suite_end(void)567  static inline void kasan_kunit_test_suite_end(void) { }
568  
569  #endif /* CONFIG_KASAN_KUNIT_TEST */
570  
571  #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) || IS_ENABLED(CONFIG_KASAN_MODULE_TEST)
572  
573  bool kasan_save_enable_multi_shot(void);
574  void kasan_restore_multi_shot(bool enabled);
575  
576  #endif
577  
578  /*
579   * Exported functions for interfaces called from assembly or from generated
580   * code. Declared here to avoid warnings about missing declarations.
581   */
582  
583  void __asan_register_globals(void *globals, ssize_t size);
584  void __asan_unregister_globals(void *globals, ssize_t size);
585  void __asan_handle_no_return(void);
586  void __asan_alloca_poison(void *, ssize_t size);
587  void __asan_allocas_unpoison(void *stack_top, ssize_t stack_bottom);
588  
589  void __asan_load1(void *);
590  void __asan_store1(void *);
591  void __asan_load2(void *);
592  void __asan_store2(void *);
593  void __asan_load4(void *);
594  void __asan_store4(void *);
595  void __asan_load8(void *);
596  void __asan_store8(void *);
597  void __asan_load16(void *);
598  void __asan_store16(void *);
599  void __asan_loadN(void *, ssize_t size);
600  void __asan_storeN(void *, ssize_t size);
601  
602  void __asan_load1_noabort(void *);
603  void __asan_store1_noabort(void *);
604  void __asan_load2_noabort(void *);
605  void __asan_store2_noabort(void *);
606  void __asan_load4_noabort(void *);
607  void __asan_store4_noabort(void *);
608  void __asan_load8_noabort(void *);
609  void __asan_store8_noabort(void *);
610  void __asan_load16_noabort(void *);
611  void __asan_store16_noabort(void *);
612  void __asan_loadN_noabort(void *, ssize_t size);
613  void __asan_storeN_noabort(void *, ssize_t size);
614  
615  void __asan_report_load1_noabort(void *);
616  void __asan_report_store1_noabort(void *);
617  void __asan_report_load2_noabort(void *);
618  void __asan_report_store2_noabort(void *);
619  void __asan_report_load4_noabort(void *);
620  void __asan_report_store4_noabort(void *);
621  void __asan_report_load8_noabort(void *);
622  void __asan_report_store8_noabort(void *);
623  void __asan_report_load16_noabort(void *);
624  void __asan_report_store16_noabort(void *);
625  void __asan_report_load_n_noabort(void *, ssize_t size);
626  void __asan_report_store_n_noabort(void *, ssize_t size);
627  
628  void __asan_set_shadow_00(const void *addr, ssize_t size);
629  void __asan_set_shadow_f1(const void *addr, ssize_t size);
630  void __asan_set_shadow_f2(const void *addr, ssize_t size);
631  void __asan_set_shadow_f3(const void *addr, ssize_t size);
632  void __asan_set_shadow_f5(const void *addr, ssize_t size);
633  void __asan_set_shadow_f8(const void *addr, ssize_t size);
634  
635  void *__asan_memset(void *addr, int c, ssize_t len);
636  void *__asan_memmove(void *dest, const void *src, ssize_t len);
637  void *__asan_memcpy(void *dest, const void *src, ssize_t len);
638  
639  void __hwasan_load1_noabort(void *);
640  void __hwasan_store1_noabort(void *);
641  void __hwasan_load2_noabort(void *);
642  void __hwasan_store2_noabort(void *);
643  void __hwasan_load4_noabort(void *);
644  void __hwasan_store4_noabort(void *);
645  void __hwasan_load8_noabort(void *);
646  void __hwasan_store8_noabort(void *);
647  void __hwasan_load16_noabort(void *);
648  void __hwasan_store16_noabort(void *);
649  void __hwasan_loadN_noabort(void *, ssize_t size);
650  void __hwasan_storeN_noabort(void *, ssize_t size);
651  
652  void __hwasan_tag_memory(void *, u8 tag, ssize_t size);
653  
654  void *__hwasan_memset(void *addr, int c, ssize_t len);
655  void *__hwasan_memmove(void *dest, const void *src, ssize_t len);
656  void *__hwasan_memcpy(void *dest, const void *src, ssize_t len);
657  
658  void kasan_tag_mismatch(void *addr, unsigned long access_info,
659  			unsigned long ret_ip);
660  
661  #endif /* __MM_KASAN_KASAN_H */
662