The ARM decompressor/EFI stub do not implement the functions (__stack_chk_guard_setup, etc) that are required for support of stack protection. The actual enablement of stack protection is controlled by heuristics in GCC, which the code added for the EFI stub triggers when CONFIG_STACKPROTECTOR is set. Even with CONFIG_STACKPROTECTOR set, the decompressor was not compiled with stack protection actually enabled. Adding -fno-stack-protector to the decompressor/stub build keeps it building without stack protection as it has always been built. The x86 decompressor/stub is also build with -fno-stack-protector. Signed-off-by: Roy Franz <roy.franz@xxxxxxxxxx> --- arch/arm/boot/compressed/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 5fad8bd..551dbf9 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -136,7 +136,7 @@ ORIG_CFLAGS := $(KBUILD_CFLAGS) KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) endif -ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) +ccflags-y := -fpic -mno-single-pic-base -fno-builtin -fno-stack-protector -I$(obj) asflags-y := -DZIMAGE # Supply kernel BSS size to the decompressor via a linker symbol. -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
