Commit 42101571 authored by Linus Walleij's avatar Linus Walleij Committed by Russell King
Browse files

ARM: 9017/2: Enable KASan for ARM 



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

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: default avatarDmitry Vyukov <dvyukov@google.com>
Reviewed-by: default avatarArd 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: default avatarAbbott Liu <liuwenliang@huawei.com>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent 5615f69b

Documentation/dev-tools/kasan.rst

+2 −2
Original line number Diff line number Diff line
@@ -18,8 +18,8 @@ out-of-bounds accesses for global variables is only supported since Clang 11. 


Tag-based KASAN is only supported in Clang.



Currently generic KASAN is supported for the x86_64, arm64, xtensa, s390 and

riscv architectures, and tag-based KASAN is supported only for arm64.

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

-----

Documentation/features/debug/KASAN/arch-support.txt

+1 −1
Original line number Diff line number Diff line
@@ -8,7 +8,7 @@ 
    -----------------------

    |       alpha: | TODO |

    |         arc: | TODO |

    |         arm: | TODO |

    |         arm: |  ok  |

    |       arm64: |  ok  |

    |         c6x: | TODO |

    |        csky: | TODO |

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -67,6 +67,7 @@ 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_SECCOMP

	select HAVE_ARCH_SECCOMP_FILTER if AEABI && !OABI_COMPAT

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