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