linux-kernel - Re: [PATCH 6.12 000/158] 6.12.40-rc1 review

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Message-ID: <CA+G9fYu8JY=k-r0hnBRSkQQrFJ1Bz+ShdXNwC1TNeMt0eXaxeA@mail.gmail.com>
Date: Tue, 22 Jul 2025 23:30:32 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, clang-built-linux <llvm@...ts.linux.dev>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org, 
	akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org, 
	patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de, 
	jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com, 
	srw@...dewatkins.net, rwarsow@....de, conor@...nel.org, hargar@...rosoft.com, 
	broonie@...nel.org, Nathan Chancellor <nathan@...nel.org>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org>, 
	Ben Copeland <benjamin.copeland@...aro.org>
Subject: Re: [PATCH 6.12 000/158] 6.12.40-rc1 review

On Tue, 22 Jul 2025 at 19:27, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.12.40 release.
> There are 158 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 Thu, 24 Jul 2025 13:43:10 +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-6.12.40-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-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

With addition to the previous report on the stable-rc 6.15.8-rc1 review
While building allyesconfig build for arm64 and x86 with the toolchain
clang-nightly version 22.0.0 the following build warnings / errors
noticed on the stable-rc 6.12.40-rc1 review.

Regression Analysis:
- New regression? Yes
- Reproducibility? Yes

Build regression: arm64 x86 kcsan_test.c error variable 'dummy' is
uninitialized when passed as a const pointer argument here

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

## Build log

kernel/kcsan/kcsan_test.c:591:41: error: variable 'dummy' is
uninitialized when passed as a const pointer argument here
[-Werror,-Wuninitialized-const-pointer]
  591 |         KCSAN_EXPECT_READ_BARRIER(atomic_read(&dummy), false);
      |                                                ^~~~~
1 error generated.


## Source
* Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* Git sha: 596aae841edf981aab1df1845e6df012bed94594
* Git describe: v6.12.39-159-g596aae841edf
* Architectures: arm64 x86
* Toolchains: Debian clang version 22.0.0
(++20250721112855+43a829a7e894-1~exp1~20250721112913.1588)
* Kconfigs: allyesconfig

## Build
* Build log: https://regressions.linaro.org/lkft/linux-stable-rc-linux-6.12.y/v6.12.39-159-g596aae841edf/build/clang-nightly-allyesconfig/
* Build run: https://regressions.linaro.org/lkft/linux-stable-rc-linux-6.12.y/v6.12.39-159-g596aae841edf/testruns/1703644/
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/30EXE6Cnct6e7DCgsWWrXlMdO0z/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/30EXE6Cnct6e7DCgsWWrXlMdO0z/config

## Steps to reproduce
* tuxmake --runtime podman --target-arch arm64 --toolchain
clang-nightly --kconfig allyesconfig LLVM=1 LLVM_IAS=1

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