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| -rw-r--r-- | lib/Kconfig.ubsan | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan new file mode 100644 index 000000000..98fa559eb --- /dev/null +++ b/lib/Kconfig.ubsan @@ -0,0 +1,44 @@ +config ARCH_HAS_UBSAN_SANITIZE_ALL + bool + +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/dev-tools/ubsan.rst). + +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 TEST_UBSAN + tristate "Module for testing for undefined behavior detection" + depends on m && UBSAN + help + This is a test module for UBSAN. + It triggers various undefined behavior, and detect it. |