Kconfig.ubsan 1.55 KB
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config ARCH_HAS_UBSAN_SANITIZE_ALL
	bool

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config ARCH_WANTS_UBSAN_NO_NULL
	def_bool n

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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
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	  via boot parameter ubsan_handle
	  (see: Documentation/dev-tools/ubsan.rst).
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config UBSAN_SANITIZE_ALL
	bool "Enable instrumentation for the entire kernel"
	depends on UBSAN
	depends on ARCH_HAS_UBSAN_SANITIZE_ALL
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	# 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
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	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.
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	  Enabling this option will get kernel image size increased
	  significantly.
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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.
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	  Enabling this option on architectures that support unaligned
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	  accesses may produce a lot of false positives.
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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.