1 #ifndef __MM_KASAN_KASAN_H 2 #define __MM_KASAN_KASAN_H 3 4 #include <linux/kasan.h> 5 6 #define KASAN_SHADOW_SCALE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT) 7 #define KASAN_SHADOW_MASK (KASAN_SHADOW_SCALE_SIZE - 1) 8 9 #define KASAN_FREE_PAGE 0xFF /* page was freed */ 10 #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */ 11 #define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */ 12 #define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */ 13 #define KASAN_GLOBAL_REDZONE 0xFA /* redzone for global variable */ 14 15 /* 16 * Stack redzone shadow values 17 * (Those are compiler's ABI, don't change them) 18 */ 19 #define KASAN_STACK_LEFT 0xF1 20 #define KASAN_STACK_MID 0xF2 21 #define KASAN_STACK_RIGHT 0xF3 22 #define KASAN_STACK_PARTIAL 0xF4 23 24 /* Don't break randconfig/all*config builds */ 25 #ifndef KASAN_ABI_VERSION 26 #define KASAN_ABI_VERSION 1 27 #endif 28 29 struct kasan_access_info { 30 const void *access_addr; 31 const void *first_bad_addr; 32 size_t access_size; 33 bool is_write; 34 unsigned long ip; 35 }; 36 37 /* The layout of struct dictated by compiler */ 38 struct kasan_source_location { 39 const char *filename; 40 int line_no; 41 int column_no; 42 }; 43 44 /* The layout of struct dictated by compiler */ 45 struct kasan_global { 46 const void *beg; /* Address of the beginning of the global variable. */ 47 size_t size; /* Size of the global variable. */ 48 size_t size_with_redzone; /* Size of the variable + size of the red zone. 32 bytes aligned */ 49 const void *name; 50 const void *module_name; /* Name of the module where the global variable is declared. */ 51 unsigned long has_dynamic_init; /* This needed for C++ */ 52 #if KASAN_ABI_VERSION >= 4 53 struct kasan_source_location *location; 54 #endif 55 }; 56 57 static inline const void *kasan_shadow_to_mem(const void *shadow_addr) 58 { 59 return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET) 60 << KASAN_SHADOW_SCALE_SHIFT); 61 } 62 63 static inline bool kasan_report_enabled(void) 64 { 65 return !current->kasan_depth; 66 } 67 68 void kasan_report(unsigned long addr, size_t size, 69 bool is_write, unsigned long ip); 70 71 #endif 72