Messages in this thread | | | Date | Thu, 16 Jan 2020 17:46:49 +0000 | From | Will Deacon <> | Subject | Re: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack |
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On Fri, Dec 06, 2019 at 02:13:48PM -0800, Sami Tolvanen wrote: > 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> > --- > 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
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