Re: [PATCH 6.1 000/291] 6.1.135-rc1 review

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, Apr 24, 2025 at 07:01:02PM +0530, Naresh Kamboju wrote:
> On Wed, 23 Apr 2025 at 20:16, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > This is the start of the stable review cycle for the 6.1.135 release.
> > There are 291 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Fri, 25 Apr 2025 14:25:27 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> >         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.135-rc1.gz
> > or in the git tree and branch at:
> >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> 
> Regressions on arm, riscv and x86_64 with following kernel configs with
> clang-20 and clang-nightly toolchains on stable-rc 6.1.135-rc1.
> 
> Build regressions:
> * arm, build
>   - clang-20-allmodconfig
> 
> * i386, build
>   - clang-nightly-lkftconfig-kselftest
> 
> * riscv, build
>   - clang-20-allmodconfig
> 
> * x86_64, build
>   - clang-20-allmodconfig
>   - clang-nightly-lkftconfig-kselftest
> 
> Regression Analysis:
>  - New regression? Yes
>  - Reproducibility? Yes
> 
> Build regression: arm allmodconfig variable 'is_redirect' is used
> uninitialized whenever 'if' condition is true
> 
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> 
> ## Build error:
> net/sched/act_mirred.c:265:6: error: variable 'is_redirect' is used
> uninitialized whenever 'if' condition is true
> [-Werror,-Wsometimes-uninitialized]
>   265 |         if (unlikely(!(dev->flags & IFF_UP)) ||
> !netif_carrier_ok(dev)) {
>       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Odd this isn't showing up in newer releases, as this is an old commit
and nothing has changed in this file since then (it showed up in 6.8.)

Is there some follow-up commit somewhere that I'm missing that resolved
this issue?

thanks,

greg k-h