mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
c0054c565a
Using kasan_reset_tag() currently results in a function call. As it's called quite often from the allocator code, this leads to a noticeable slowdown. Move it to include/linux/kasan.h and turn it into a static inline function. Also remove the now unneeded reset_tag() internal KASAN macro and use kasan_reset_tag() instead. Link: https://lkml.kernel.org/r/6940383a3a9dfb416134d338d8fac97a9ebb8686.1606162397.git.andreyknvl@google.com Link: https://linux-review.googlesource.com/id/I4d2061acfe91d480a75df00b07c22d8494ef14b5 Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Marco Elver <elver@google.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
42 lines
900 B
C
42 lines
900 B
C
// 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"
|
|
|
|
const char *get_bug_type(struct kasan_access_info *info)
|
|
{
|
|
return "invalid-access";
|
|
}
|
|
|
|
void *find_first_bad_addr(void *addr, size_t size)
|
|
{
|
|
return kasan_reset_tag(addr);
|
|
}
|
|
|
|
void 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 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);
|
|
}
|