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    Subject[PATCH v7 31/41] kasan, arm64: don't allow SW_TAGS with ARM64_MTE
    From
    Software tag-based KASAN provides its own tag checking machinery that
    can conflict with MTE. Don't allow enabling software tag-based KASAN
    when MTE is enabled.

    Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
    Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
    Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
    ---
    Change-Id: Icd29bd0c6b1d3d7a0ee3d50c20490f404d34fc97
    ---
    arch/arm64/Kconfig | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
    index fddb48d35f0f..cebbd07ba27c 100644
    --- a/arch/arm64/Kconfig
    +++ b/arch/arm64/Kconfig
    @@ -134,7 +134,7 @@ config ARM64
    select HAVE_ARCH_JUMP_LABEL
    select HAVE_ARCH_JUMP_LABEL_RELATIVE
    select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
    - select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN
    + select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE)
    select HAVE_ARCH_KGDB
    select HAVE_ARCH_MMAP_RND_BITS
    select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
    --
    2.29.1.341.ge80a0c044ae-goog
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