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ANDROID: ARM: 9017/2: Enable KASan for ARM

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[Lee: Adding back reverted commit]

This patch enables the kernel address sanitizer for ARM. XIP_KERNEL
has not been tested and is therefore not allowed for now.

Bug: 191637574
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: kasan-dev@googlegroups.com
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Ard Biesheuvel <ardb@kernel.org> # QEMU/KVM/mach-virt/LPAE/8G
Tested-by: Florian Fainelli <f.fainelli@gmail.com> # Brahma SoCs
Tested-by: Ahmad Fatoum <a.fatoum@pengutronix.de> # i.MX6Q
Signed-off-by: Abbott Liu <liuwenliang@huawei.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

Change-Id: I7dcb04352e653700efaab9242437ccf0f1724139
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Lee Jones
2021-07-21 16:08:45 +01:00
committed by Lee Jones
parent 1e794cfa30
commit fb01411774
3 changed files with 3 additions and 2 deletions
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2
Documentation/dev-tools/kasan.rst
View File

@@ -35,7 +35,7 @@ This mode is supported in GCC 10+ and Clang 11+.
Both software KASAN modes work with SLUB and SLAB memory allocators,
while the hardware tag-based KASAN currently only supports SLUB.
Currently generic KASAN is supported for the x86_64, arm64, xtensa, s390,
Currently generic KASAN is supported for the x86_64, arm, arm64, xtensa, s390,
and riscv architectures, and tag-based KASAN is supported only for arm64.
Usage

2
Documentation/features/debug/KASAN/arch-support.txt
View File

@@ -8,7 +8,7 @@
-----------------------
| alpha: | TODO |
| arc: | TODO |
| arm: | TODO |
| arm: | ok |
| arm64: | ok |
| csky: | TODO |
| h8300: | TODO |

1
arch/arm/Kconfig
View File

@@ -71,6 +71,7 @@ config ARM
select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL
select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_PFN_VALID
select HAVE_ARCH_SECCOMP