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Date: Thu, 31 Oct 2019 21:01:30 -0700
From: Kees Cook <keescook@...omium.org>
To: samitolvanen@...gle.com
Cc: Will Deacon <will@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Dave Martin <Dave.Martin@....com>,
	Laura Abbott <labbott@...hat.com>,
	Mark Rutland <mark.rutland@....com>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Jann Horn <jannh@...gle.com>,
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	clang-built-linux@...glegroups.com,
	kernel-hardening@...ts.openwall.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 15/17] arm64: vdso: disable Shadow Call Stack

On Thu, Oct 31, 2019 at 09:46:35AM -0700, samitolvanen@...gle.com wrote:
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>

I think Nick already mentioned the missing commit log. With that:

Reviewed-by: Kees Cook <keescook@...omium.org>

-Kees

> ---
>  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
> -- 
> 2.24.0.rc0.303.g954a862665-goog
> 

-- 
Kees Cook

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