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    Subject[PATCH v11 08/12] arm64: vdso: disable Shadow Call Stack
    From
    Shadow stacks are only available in the kernel, so disable SCS
    instrumentation for the vDSO.

    Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
    Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
    Reviewed-by: Kees Cook <keescook@chromium.org>
    Reviewed-by: Mark Rutland <mark.rutland@arm.com>
    Acked-by: Will Deacon <will@kernel.org>
    ---
    arch/arm64/kernel/vdso/Makefile | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
    index dd2514bb1511..a87a4f11724e 100644
    --- a/arch/arm64/kernel/vdso/Makefile
    +++ b/arch/arm64/kernel/vdso/Makefile
    @@ -25,7 +25,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING

    VDSO_LDFLAGS := -Bsymbolic

    -CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os
    +CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS)
    KBUILD_CFLAGS += $(DISABLE_LTO)
    KASAN_SANITIZE := n
    UBSAN_SANITIZE := n
    --
    2.26.1.301.g55bc3eb7cb9-goog
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