Re: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack
From: Will Deacon <will@kernel.org>
Date: 2020-01-16 17:47:14
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On Fri, Dec 06, 2019 at 02:13:48PM -0800, Sami Tolvanen wrote:
quoted hunk ↗ jump to hunk
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 <redacted> Reviewed-by: Kees Cook <redacted> Reviewed-by: Mark Rutland <mark.rutland@arm.com> --- 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)
Should we be removing -ffixed-x18 too, or does that not propagate here anyway? Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel