854686f4ed
This is a test module for UBSAN. It triggers all undefined behaviors that linux supports now, and detect them. All test-cases have passed by compiling with gcc-5.5.0. If use gcc-4.9.x, misaligned, out-of-bounds, object-size-mismatch will not be detected. Because gcc-4.9.x doesn't support them. Link: http://lkml.kernel.org/r/20180309102247.GA2944@pjb1027-Latitude-E5410 Signed-off-by: Jinbum Park <jinb.park7@gmail.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
55 lines
1.7 KiB
Text
55 lines
1.7 KiB
Text
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/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 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.
|
|
|
|
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.
|