config ARCH_HAS_UBSAN_SANITIZE_ALL bool config UBSAN bool "Undefined behaviour sanity checker" help This option enables undefined behaviour sanity checker Compile-time instrumentation is used to detect various undefined behaviours in runtime. Various types of checks may be enabled via boot parameter ubsan_handle (see: Documentation/dev-tools/ubsan.rst). config UBSAN_SANITIZE_ALL bool "Enable instrumentation for the entire kernel" depends on UBSAN depends on ARCH_HAS_UBSAN_SANITIZE_ALL # We build with -Wno-maybe-uninitilzed, but we still want to # use -Wmaybe-uninitilized in allmodconfig builds. # So dependsy bellow used to disable this option in allmodconfig depends on !COMPILE_TEST default y help This option activates instrumentation for the entire kernel. If you don't enable this option, you have to explicitly specify UBSAN_SANITIZE := y for the files/directories you want to check for UB. Enabling this option will get kernel image size increased significantly. config UBSAN_NO_ALIGNMENT bool "Disable checking of pointers alignment" depends on UBSAN default y if HAVE_EFFICIENT_UNALIGNED_ACCESS help This option disables the check of unaligned memory accesses. This option should be used when building allmodconfig. Disabling this option on architectures that support unaligned accesses may produce a lot of false positives. config UBSAN_ALIGNMENT def_bool !UBSAN_NO_ALIGNMENT config TEST_UBSAN tristate "Module for testing for undefined behavior detection" depends on m && UBSAN help This is a test module for UBSAN. It triggers various undefined behavior, and detect it.