From: Kees Cook Date: Wed, 13 Mar 2024 03:45:52 +0000 (-0700) Subject: ubsan: Disable signed integer overflow sanitizer on GCC < 8 X-Git-Tag: v6.9-rc1~11^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77fcc34769c8a0a228af32c52ba7d3ef64690c0d;p=thirdparty%2Flinux.git ubsan: Disable signed integer overflow sanitizer on GCC < 8 For opting functions out of sanitizer coverage, the "no_sanitize" attribute is used, but in GCC this wasn't introduced until GCC 8. Disable the sanitizer unless we're not using GCC, or it is GCC version 8 or higher. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202403110643.27JXEVCI-lkp@intel.com/ Reviewed-by: Marco Elver Signed-off-by: Kees Cook --- diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan index 48a67058f84e..e81e1ac4a919 100644 --- a/lib/Kconfig.ubsan +++ b/lib/Kconfig.ubsan @@ -119,6 +119,8 @@ config UBSAN_SIGNED_WRAP bool "Perform checking for signed arithmetic wrap-around" default UBSAN depends on !COMPILE_TEST + # The no_sanitize attribute was introduced in GCC with version 8. + depends on !CC_IS_GCC || GCC_VERSION >= 80000 depends on $(cc-option,-fsanitize=signed-integer-overflow) help This option enables -fsanitize=signed-integer-overflow which checks