1 /* 2 * Copyright (c) 2000-2021 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _KASAN_CLASSIC_H_ 30 #define _KASAN_CLASSIC_H_ 31 32 #include <mach/mach_types.h> 33 34 /* Catch obvious mismatches */ 35 #if KASAN && !__has_feature(address_sanitizer) 36 #error "KASAN selected, but not enabled in compiler" 37 #endif 38 39 #if !KASAN && __has_feature(address_sanitizer) 40 #error "ASAN enabled in compiler, but kernel is not configured for KASAN" 41 #endif 42 43 /* Granularity is 8 bytes */ 44 #define KASAN_SIZE_ALIGNMENT 0x7UL 45 46 typedef uintptr_t uptr; 47 48 #define KASAN_DEBUG 0 49 #define KASAN_KALLOC 1 50 #define KASAN_ZALLOC 1 51 #define KASAN_DYNAMIC_BLACKLIST 1 52 /* 53 * KASAN features and config 54 */ 55 #define FAKESTACK 1 56 /* KASAN_KALLOC defined in kasan.h */ 57 /* KASAN_ZALLOC defined in kasan.h */ 58 #define FAKESTACK_QUARANTINE (1 && FAKESTACK) 59 60 #define QUARANTINE_ENTRIES 5000 61 #define QUARANTINE_MAXSIZE MiB(10) 62 63 /* 64 * KASAN-CLASSIC shadow table entry values. 65 * - 0: the full 8 bytes are addressable 66 * - [1,7]: the byte is partially addressable (as many valid bytes 67 * as specified) 68 * - 0xFx, 0xAC, 0xE9: byte is not addressable and poisoned somehow. 69 */ 70 #define ASAN_VALID 0x00 71 #define ASAN_PARTIAL1 0x01 72 #define ASAN_PARTIAL2 0x02 73 #define ASAN_PARTIAL3 0x03 74 #define ASAN_PARTIAL4 0x04 75 #define ASAN_PARTIAL5 0x05 76 #define ASAN_PARTIAL6 0x06 77 #define ASAN_PARTIAL7 0x07 78 #define ASAN_ARRAY_COOKIE 0xac 79 #define ASAN_STACK_RZ 0xf0 80 #define ASAN_STACK_LEFT_RZ 0xf1 81 #define ASAN_STACK_MID_RZ 0xf2 82 #define ASAN_STACK_RIGHT_RZ 0xf3 83 #define ASAN_STACK_FREED 0xf5 84 #define ASAN_STACK_OOSCOPE 0xf8 85 #define ASAN_GLOBAL_RZ 0xf9 86 #define ASAN_HEAP_RZ 0xe9 87 #define ASAN_HEAP_LEFT_RZ 0xfa 88 #define ASAN_HEAP_RIGHT_RZ 0xfb 89 #define ASAN_HEAP_FREED 0xfd 90 91 #define KASAN_GUARD_SIZE (16) 92 #define KASAN_GUARD_PAD (KASAN_GUARD_SIZE * 2) 93 94 #define KASAN_HEAP_ZALLOC 0 95 #define KASAN_HEAP_KALLOC 1 96 #define KASAN_HEAP_FAKESTACK 2 97 #define KASAN_HEAP_TYPES 3 98 99 __BEGIN_DECLS 100 /* KASAN-CLASSIC zalloc hooks */ 101 vm_size_t kasan_alloc_resize(vm_size_t); 102 vm_address_t kasan_alloc(vm_offset_t, vm_size_t, vm_size_t, vm_size_t); 103 vm_address_t kasan_realloc(vm_offset_t, vm_size_t, vm_size_t, vm_size_t); 104 vm_address_t kasan_dealloc(vm_offset_t, vm_size_t *); 105 vm_size_t kasan_user_size(vm_offset_t); 106 void kasan_check_free(vm_offset_t, vm_size_t, unsigned); 107 void kasan_free(void **, vm_size_t *, int, zone_t *, vm_size_t, bool); 108 109 /* KASAN-CLASSIC Quarantine (zalloc) hooks */ 110 void kasan_free(void **, vm_size_t *, int, zone_t *, vm_size_t, bool); 111 void __asan_poison_cxx_array_cookie(uptr); 112 uptr __asan_load_cxx_array_cookie(uptr *); 113 void kasan_unpoison_cxx_array_cookie(void *); 114 115 __END_DECLS 116 #endif /* _KASAN_CLASSIC_H_ */ 117