RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-06-01 05:48:12 +00:00
Code Issues Activity Actions

Kernel: Add initial basic support for KASAN

Browse source 
This commit adds minimal support for compiler-instrumentation based
memory access sanitization.
Currently we only support detection of kmalloc redzone accesses, and
kmalloc use-after-free accesses.

Support for inline checks (for improved performance), and for stack
use-after-return and use-after-return detection is left for future PRs.
This commit is contained in:
Idan Horowitz 2023-12-29 02:36:39 +02:00 • committed by Andreas Kling
parent 7ad7ae7000
commit f7a1f28d7f
10 changed files with 538 additions and 63 deletions
Download patch file Download diff file Expand all files Collapse all files

27
Kernel/Security/AddressSanitizer.h
View file

@ -1,17 +1,40 @@
/*
* Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
* Copyright (c) 2023, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Atomic.h>
#include <AK/Types.h>
namespace Kernel::AddressSanitizer {
void shadow_va_check_load(unsigned long address, size_t size, void* return_addr);
extern Atomic<bool> g_kasan_is_deadly;
void shadow_va_check_store(unsigned long address, size_t size, void* return_addr);
enum class ShadowType : u8 {
Unpoisoned8Bytes = 0,
Unpoisoned1Byte = 1,
Unpoisoned2Bytes = 2,
Unpoisoned3Bytes = 3,
Unpoisoned4Bytes = 4,
Unpoisoned5Bytes = 5,
Unpoisoned6Bytes = 6,
Unpoisoned7Bytes = 7,
StackLeft = 0xF1,
StackMiddle = 0xF2,
StackRight = 0xF3,
UseAfterReturn = 0xF5,
UseAfterScope = 0xF8,
Generic = 0xFA,
Malloc = 0xFB,
Free = 0xFC,
};
void init(FlatPtr shadow_base);
void fill_shadow(FlatPtr address, size_t size, ShadowType type);
void mark_region(FlatPtr address, size_t valid_size, size_t total_size, ShadowType type);
}