mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Christian Borntraeger](/assets/img/avatar_default.png)
Some architectures use a hardware defined structure at address zero. Checking for a null pointer will result in many ubsan reports. Allow users to disable the null sanitizer. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
47 lines
1.5 KiB
Text
47 lines
1.5 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/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.
|
|
|
|
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.
|