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- config ARCH_HAS_UBSAN_SANITIZE_ALL
- bool
- config ARCH_WANTS_UBSAN_NO_NULL
- def_bool n
- 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/ubsan.txt).
- 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_ALIGNMENT
- bool "Enable checking of pointers alignment"
- depends on UBSAN
- default y if !HAVE_EFFICIENT_UNALIGNED_ACCESS
- help
- This option enables detection of unaligned memory accesses.
- Enabling this option on architectures that support unaligned
- accesses may produce a lot of false positives.
- config UBSAN_NULL
- bool "Enable checking of null pointers"
- depends on UBSAN
- default y if !ARCH_WANTS_UBSAN_NO_NULL
- help
- This option enables detection of memory accesses via a
- null pointer.
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