Commit f49ee5bd authored May 02, 2018 by Sami Tolvanen Committed by Alistair Delva Nov 27, 2019

BACKPORT: FROMLIST: arm64: vdso: disable Shadow Call Stack

Shadow stacks are only available in the kernel, so disable SCS
instrumentation for the vDSO.

Bug: 145210207
Change-Id: I6e01b2c7788ba52d3b754b1fbd5bfb908b45741b
(am from https://lore.kernel.org/patchwork/patch/1149061/

)
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

parent 947e357d

arch/arm64/kernel/vdso/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,8 @@ ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
		ccflags-y += $(DISABLE_LTO)

		CFLAGS_REMOVE_vgettimeofday.o += $(CC_FLAGS_SCS)

		# Disable gcov profiling for VDSO code
		GCOV_PROFILE := n