diff options
Diffstat (limited to 'mm/kasan/tags_report.c')
-rw-r--r-- | mm/kasan/tags_report.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/mm/kasan/tags_report.c b/mm/kasan/tags_report.c new file mode 100644 index 000000000000..8eaf5f722271 --- /dev/null +++ b/mm/kasan/tags_report.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This file contains tag-based KASAN specific error reporting code. + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com> + * + * Some code borrowed from https://github.com/xairy/kasan-prototype by + * Andrey Konovalov <andreyknvl@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/bitops.h> +#include <linux/ftrace.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/printk.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/stackdepot.h> +#include <linux/stacktrace.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/kasan.h> +#include <linux/module.h> + +#include <asm/sections.h> + +#include "kasan.h" +#include "../slab.h" + +const char *get_bug_type(struct kasan_access_info *info) +{ + return "invalid-access"; +} + +void *find_first_bad_addr(void *addr, size_t size) +{ + u8 tag = get_tag(addr); + void *p = reset_tag(addr); + void *end = p + size; + + while (p < end && tag == *(u8 *)kasan_mem_to_shadow(p)) + p += KASAN_SHADOW_SCALE_SIZE; + return p; +} + +void print_tags(u8 addr_tag, const void *addr) +{ + u8 *shadow = (u8 *)kasan_mem_to_shadow(addr); + + pr_err("Pointer tag: [%02x], memory tag: [%02x]\n", addr_tag, *shadow); +} |