blob: f3d3be614e4b084eef9cda4cc57d35d18775b4e2 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* This file contains hardware tag-based KASAN specific error reporting code.
*
* Copyright (c) 2020 Google, Inc.
* Author: Andrey Konovalov <andreyknvl@google.com>
*/
#include <linux/kasan.h>
#include <linux/kernel.h>
#include <linux/memory.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/types.h>
#include "kasan.h"
void *kasan_find_first_bad_addr(void *addr, size_t size)
{
/* Return the same value regardless of whether addr_has_metadata(). */
return kasan_reset_tag(addr);
}
void kasan_metadata_fetch_row(char *buffer, void *row)
{
int i;
for (i = 0; i < META_BYTES_PER_ROW; i++)
buffer[i] = hw_get_mem_tag(row + i * KASAN_GRANULE_SIZE);
}
void kasan_print_tags(u8 addr_tag, const void *addr)
{
u8 memory_tag = hw_get_mem_tag((void *)addr);
pr_err("Pointer tag: [%02x], memory tag: [%02x]\n",
addr_tag, memory_tag);
}