lib/Kconfig.ubsan

   1 config ARCH_HAS_UBSAN_SANITIZE_ALL
   2         bool
   3
   4 config 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
  12 config UBSAN_SANITIZE_ALL
  13         bool "Enable instrumentation for the entire kernel"
  14         depends on UBSAN
  15         depends on ARCH_HAS_UBSAN_SANITIZE_ALL
  16         default y
  17         help
  18           This option activates instrumentation for the entire kernel.
  19           If you don't enable this option, you have to explicitly specify
  20           UBSAN_SANITIZE := y for the files/directories you want to check for UB.
  21           Enabling this option will get kernel image size increased
  22           significantly.
  23
  24 config UBSAN_ALIGNMENT
  25         bool "Enable checking of pointers alignment"
  26         depends on UBSAN
  27         default y if !HAVE_EFFICIENT_UNALIGNED_ACCESS
  28         help
  29           This option enables detection of unaligned memory accesses.
  30           Enabling this option on architectures that support unaligned
  31           accesses may produce a lot of false positives.