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Linus WalleijRussell King
Linus Walleij
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Russell King
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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 <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: [email protected] Acked-by: Dmitry Vyukov <[email protected]> Reviewed-by: Ard Biesheuvel <[email protected]> Tested-by: Ard Biesheuvel <[email protected]> # QEMU/KVM/mach-virt/LPAE/8G Tested-by: Florian Fainelli <[email protected]> # Brahma SoCs Tested-by: Ahmad Fatoum <[email protected]> # i.MX6Q Signed-off-by: Abbott Liu <[email protected]> Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Russell King <[email protected]>
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‎Documentation/dev-tools/kasan.rst‎

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@@ -18,8 +18,8 @@ out-of-bounds accesses for global variables is only supported since Clang 11.
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Tag-based KASAN is only supported in Clang.
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Currently generic KASAN is supported for the x86_64, arm64, xtensa, s390 and
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riscv architectures, and tag-based KASAN is supported only for arm64.
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Currently generic KASAN is supported for the x86_64, arm, arm64, xtensa, s390
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and riscv architectures, and tag-based KASAN is supported only for arm64.
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Usage
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‎Documentation/features/debug/KASAN/arch-support.txt‎

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-----------------------
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| alpha: | TODO |
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| arc: | TODO |
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| arm: | TODO |
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| arm: | ok |
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| arm64: | ok |
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| c6x: | TODO |
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| csky: | TODO |

‎arch/arm/Kconfig‎

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select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
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select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
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select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
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select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL
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select HAVE_ARCH_MMAP_RND_BITS if MMU
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select HAVE_ARCH_SECCOMP
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select HAVE_ARCH_SECCOMP_FILTER if AEABI && !OABI_COMPAT

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