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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2021-09-29 16:18:03 -0500 |
|---|---|---|
| committer | Gustavo A. R. Silva <gustavoars@kernel.org> | 2021-11-15 13:45:12 -0600 |
| commit | 552a23a0e5d0a84cecd4687043d8030673981d30 (patch) | |
| tree | db0e4f87053ea2101e57f9bdeed517dfda69a7e1 /Makefile | |
| parent | fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf (diff) | |
| download | lwn-552a23a0e5d0a84cecd4687043d8030673981d30.tar.gz lwn-552a23a0e5d0a84cecd4687043d8030673981d30.zip | |
Makefile: Enable -Wcast-function-type
In order to make sure new function cast mismatches are not introduced
in the kernel (to avoid tripping CFI checking), the kernel should be
globally built with -Wcast-function-type.
Link: https://github.com/KSPP/linux/issues/20
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -953,6 +953,11 @@ KBUILD_CFLAGS += -Wvla # disable pointer signed / unsigned warnings in gcc 4.0 KBUILD_CFLAGS += -Wno-pointer-sign +# In order to make sure new function cast mismatches are not introduced +# in the kernel (to avoid tripping CFI checking), the kernel should be +# globally built with -Wcast-function-type. +KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) + # disable stringop warnings in gcc 8+ KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |