Shadow stacks are not available in the EFI stub, filter out SCS flags. Suggested-by: James Morse <james.morse@xxxxxxx> Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx> --- drivers/firmware/efi/libstub/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 094eabdecfe6..b52ae8c29560 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -32,6 +32,9 @@ KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \ $(call cc-option,-fno-stack-protector) \ -D__DISABLE_EXPORTS +# remove SCS flags from all objects in this directory +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) + GCOV_PROFILE := n KASAN_SANITIZE := n UBSAN_SANITIZE := n -- 2.26.1.301.g55bc3eb7cb9-goog
