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ubsan: Disable signed integer overflow sanitizer on GCC < 8

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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 <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403110643.27JXEVCI-lkp@intel.com/
Reviewed-by: Marco Elver <elver@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2024-03-12 20:45:52 -07:00
parent 0a7b0acece
commit 77fcc34769
1 changed files with 2 additions and 0 deletions
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lib/Kconfig.ubsan
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@ -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