LXR linux/mm/kasan/report_hw

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * This file contains hardware tag-based KASAN specific error reporting code.
   4 *
   5 * Copyright (c) 2020 Google, Inc.
   6 * Author: Andrey Konovalov <andreyknvl@google.com>
   7 */
   8
   9#include <linux/kasan.h>
  10#include <linux/kernel.h>
  11#include <linux/memory.h>
  12#include <linux/mm.h>
  13#include <linux/string.h>
  14#include <linux/types.h>
  15
  16#include "kasan.h"
  17
  18void *kasan_find_first_bad_addr(void *addr, size_t size)
  19{
  20        return kasan_reset_tag(addr);
  21}
  22
  23void kasan_metadata_fetch_row(char *buffer, void *row)
  24{
  25        int i;
  26
  27        for (i = 0; i < META_BYTES_PER_ROW; i++)
  28                buffer[i] = hw_get_mem_tag(row + i * KASAN_GRANULE_SIZE);
  29}
  30
  31void kasan_print_tags(u8 addr_tag, const void *addr)
  32{
  33        u8 memory_tag = hw_get_mem_tag((void *)addr);
  34
  35        pr_err("Pointer tag: [%02x], memory tag: [%02x]\n",
  36                addr_tag, memory_tag);
  37}
  38