Indirect branch tracking is a hardware security feature that verifies near indirect call/jump instructions arrive at intended targets, which are labeled by the compiler with ENDBR opcodes. If such instructions reach unlabeled locations, the processor raises control-protection faults. Check the compiler is up-to-date at config time. Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 816830e3f062..f462ef9d3305 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1964,6 +1964,7 @@ config X86_CET depends on X86_64 depends on AS_WRUSS depends on ARCH_HAS_SHADOW_STACK + depends on $(cc-option,-fcf-protection) select ARCH_USES_HIGH_VMA_FLAGS select ARCH_MAYBE_MKWRITE select ARCH_USE_GNU_PROPERTY -- 2.21.0
