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ubsan: integer-overflow: depend on BROKEN to keep this out of CI

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[ Upstream commit d6a0e0bfecccdcecb08defe75a137c7262352102 ]

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]
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202505281024.f42beaa7-lkp@intel.com
Fixes: 557f8c582a ("ubsan: Reintroduce signed overflow sanitizer")
Acked-by: Eric Biggers <ebiggers@kernel.org>
Link: https://lore.kernel.org/r/20250528182616.work.296-kees@kernel.org
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kees Cook
2025-05-28 11:26:22 -07:00
committed by Greg Kroah-Hartman
parent f3a472b914
commit 5b6eb04c05
1 changed files with 2 additions and 0 deletions
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lib/Kconfig.ubsan
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@@ -118,6 +118,8 @@ config UBSAN_UNREACHABLE
config UBSAN_SIGNED_WRAP
bool "Perform checking for signed arithmetic wrap-around"
# This is very experimental so drop the next line if you really want it
depends on BROKEN
depends on !COMPILE_TEST
# The no_sanitize attribute was introduced in GCC with version 8.
depends on !CC_IS_GCC || GCC_VERSION >= 80000