forked from luck/tmp_suning_uos_patched
dde5cf39d4
-fsanitize=* options makes GCC less smart than usual and increase number of 'maybe-uninitialized' false-positives. So this patch does two things: * Add -Wno-maybe-uninitialized to CFLAGS_UBSAN which will disable all such warnings for instrumented files. * Remove CONFIG_UBSAN_SANITIZE_ALL from all[yes|mod]config builds. So the all[yes|mod]config build goes without -fsanitize=* and still with -Wmaybe-uninitialized. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
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/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.
|