[PATCH v2 1/6] ubsan: Use Clang's -fsanitize-trap=undefined option
From: Kees Cook <hidden>
Date: 2024-02-02 10:16:45
Also in:
linux-acpi, linux-crypto, linux-doc, linux-hardening, linux-kbuild, lkml, llvm
Subsystem:
kernel build + files below scripts/ (unless maintained elsewhere), the rest, ubsan · Maintainers:
Nathan Chancellor, Nicolas Schier, Linus Torvalds, Kees Cook
Clang changed the way it enables UBSan trapping mode. Update the Makefile logic to discover it. Suggested-by: Fangrui Song <redacted> Link: https://lore.kernel.org/lkml/CAFP8O3JivZh+AAV7N90Nk7U2BHRNST6MRP0zHtfQ-Vj0m4+pDA@mail.gmail.com/ (local) Reviewed-by: Fangrui Song <redacted> Reviewed-by: Justin Stitt <justinstitt@google.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Nicolas Schier <redacted> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Bill Wendling <morbo@google.com> Cc: linux-kbuild@vger.kernel.org Cc: llvm@lists.linux.dev Signed-off-by: Kees Cook <redacted> --- scripts/Makefile.ubsan | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/Makefile.ubsan b/scripts/Makefile.ubsan
index 4749865c1b2c..7cf42231042b 100644
--- a/scripts/Makefile.ubsan
+++ b/scripts/Makefile.ubsan@@ -10,6 +10,6 @@ ubsan-cflags-$(CONFIG_UBSAN_DIV_ZERO) += -fsanitize=integer-divide-by-zero ubsan-cflags-$(CONFIG_UBSAN_UNREACHABLE) += -fsanitize=unreachable ubsan-cflags-$(CONFIG_UBSAN_BOOL) += -fsanitize=bool ubsan-cflags-$(CONFIG_UBSAN_ENUM) += -fsanitize=enum -ubsan-cflags-$(CONFIG_UBSAN_TRAP) += -fsanitize-undefined-trap-on-error +ubsan-cflags-$(CONFIG_UBSAN_TRAP) += $(call cc-option,-fsanitize-trap=undefined,-fsanitize-undefined-trap-on-error) export CFLAGS_UBSAN := $(ubsan-cflags-y)
--
2.34.1