1config ARCH_HAS_UBSAN_SANITIZE_ALL 2 bool 3 4config ARCH_WANTS_UBSAN_NO_NULL 5 def_bool n 6 7config UBSAN 8 bool "Undefined behaviour sanity checker" 9 help 10 This option enables undefined behaviour sanity checker 11 Compile-time instrumentation is used to detect various undefined 12 behaviours in runtime. Various types of checks may be enabled 13 via boot parameter ubsan_handle 14 (see: Documentation/dev-tools/ubsan.rst). 15 16config UBSAN_SANITIZE_ALL 17 bool "Enable instrumentation for the entire kernel" 18 depends on UBSAN 19 depends on ARCH_HAS_UBSAN_SANITIZE_ALL 20 21 # We build with -Wno-maybe-uninitilzed, but we still want to 22 # use -Wmaybe-uninitilized in allmodconfig builds. 23 # So dependsy bellow used to disable this option in allmodconfig 24 depends on !COMPILE_TEST 25 default y 26 help 27 This option activates instrumentation for the entire kernel. 28 If you don't enable this option, you have to explicitly specify 29 UBSAN_SANITIZE := y for the files/directories you want to check for UB. 30 Enabling this option will get kernel image size increased 31 significantly. 32 33config UBSAN_ALIGNMENT 34 bool "Enable checking of pointers alignment" 35 depends on UBSAN 36 default y if !HAVE_EFFICIENT_UNALIGNED_ACCESS 37 help 38 This option enables detection of unaligned memory accesses. 39 Enabling this option on architectures that support unaligned 40 accesses may produce a lot of false positives. 41 42config UBSAN_NULL 43 bool "Enable checking of null pointers" 44 depends on UBSAN 45 default y if !ARCH_WANTS_UBSAN_NO_NULL 46 help 47 This option enables detection of memory accesses via a 48 null pointer. 49