1 // SPDX-License-Identifier: GPL-2.0
3 * This file contains hardware tag-based KASAN specific error reporting code.
5 * Copyright (c) 2020 Google, Inc.
6 * Author: Andrey Konovalov <andreyknvl@google.com>
9 #include <linux/kasan.h>
10 #include <linux/kernel.h>
11 #include <linux/memory.h>
13 #include <linux/string.h>
14 #include <linux/types.h>
18 const char *get_bug_type(struct kasan_access_info *info)
20 return "invalid-access";
23 void *find_first_bad_addr(void *addr, size_t size)
25 return kasan_reset_tag(addr);
28 void metadata_fetch_row(char *buffer, void *row)
32 for (i = 0; i < META_BYTES_PER_ROW; i++)
33 buffer[i] = hw_get_mem_tag(row + i * KASAN_GRANULE_SIZE);
36 void print_tags(u8 addr_tag, const void *addr)
38 u8 memory_tag = hw_get_mem_tag((void *)addr);
40 pr_err("Pointer tag: [%02x], memory tag: [%02x]\n",
41 addr_tag, memory_tag);