net/xfrm/xfrm_policy.c:1286:8: error: variable 'dir' is uninitialized when used here [-Werror,-Wuninitialized]

From: Naresh Kamboju
Date: Fri Aug 30 2024 - 02:45:32 EST


The x86_64 defconfig builds failed on today's Linux next-20240829
due to following build warnings / errors.

Regressions:
* i386, build
- clang-18-defconfig
- clang-nightly-defconfig

* x86_64, build
- clang-18-lkftconfig
- clang-18-lkftconfig-compat
- clang-18-lkftconfig-kcsan
- clang-18-lkftconfig-no-kselftest-frag
- clang-18-x86_64_defconfig
- clang-nightly-lkftconfig
- clang-nightly-lkftconfig-kselftest
- clang-nightly-x86_64_defconfig
- rustclang-nightly-lkftconfig-kselftest

first seen on next-20240829.
Good: next-20240828
BAD: next-20240829

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

build log:
--------
net/xfrm/xfrm_policy.c:1286:8: error: variable 'dir' is uninitialized
when used here [-Werror,-Wuninitialized]
1286 | if ((dir & XFRM_POLICY_MASK) == XFRM_POLICY_OUT) {
| ^~~
net/xfrm/xfrm_policy.c:1257:9: note: initialize the variable 'dir' to
silence this warning
1257 | int dir;
| ^
| = 0
1 error generated.

Build Log links,
--------
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240829/testrun/24977652/suite/build/test/clang-18-lkftconfig/log

Build failed comparison:
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240829/testrun/24977652/suite/build/test/clang-18-lkftconfig/history/

metadata:
----
git describe: next-20240829
git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
git sha: b18bbfc14a38b5234e09c2adcf713e38063a7e6e
kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2lKF49FRX1FB3IVv46cfZc30s9y/config
build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2lKF49FRX1FB3IVv46cfZc30s9y/
toolchain: clang-18 and clang-nightly
config: defconfig

Steps to reproduce:
---------
- tuxmake --runtime podman --target-arch x86_64 --toolchain clang-18
--kconfig defconfig LLVM=1 LLVM_IAS=1

--
Linaro LKFT
https://lkft.linaro.org