On Wed, May 28, 2025 at 11:26:22AM -0700, Kees Cook wrote: > Depending on !COMPILE_TEST isn't sufficient to keep this feature out of > CI because we can't stop it from being included in randconfig builds. > This feature is still highly experimental, and is developed in lock-step > with Clang's Overflow Behavior Types[1]. Depend on BROKEN to keep it > from being enabled by anyone not expecting it. > > Link: > https://discourse.llvm.org/t/rfc-v2-clang-introduce-overflowbehaviortypes-for-wrapping-and-non-wrapping-arithmetic/86507 > [1] > Signed-off-by: Kees Cook <[email protected]> > --- > Cc: Justin Stitt <[email protected]> > Cc: Eric Biggers <[email protected]> > Cc: Arnd Bergmann <[email protected]> > Cc: Jann Horn <[email protected]> > Cc: Marco Elver <[email protected]> > Cc: [email protected] > Cc: <[email protected]> > --- > lib/Kconfig.ubsan | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan > index f6ea0c5b5da3..96cd89668467 100644 > --- a/lib/Kconfig.ubsan > +++ b/lib/Kconfig.ubsan > @@ -118,6 +118,8 @@ config UBSAN_UNREACHABLE > > config UBSAN_INTEGER_WRAP > bool "Perform checking for integer arithmetic wrap-around" > + # This is very experimental so drop the next line if you really want it > + depends on BROKEN > depends on !COMPILE_TEST > depends on $(cc-option,-fsanitize-undefined-ignore-overflow-pattern=all) > depends on $(cc-option,-fsanitize=signed-integer-overflow) > --
Acked-by: Eric Biggers <[email protected]> - Eric
