linux-kernel - Re: [PATCH 6.6 000/142] 6.6.81-rc1 review

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Message-ID: <CA+G9fYufChZpBjB_WG6Qy-L8Gmj-zBbs+PyydaADcsrB42ec0Q@mail.gmail.com>
Date: Thu, 6 Mar 2025 19:36:15 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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, clang-built-linux <llvm@...ts.linux.dev>, 
	Nathan Chancellor <nathan@...nel.org>, Borislav Petkov <bp@...en8.de>, Thomas Gleixner <tglx@...utronix.de>, 
	nik.borisov@...e.com, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org>
Subject: Re: [PATCH 6.6 000/142] 6.6.81-rc1 review

On Wed, 5 Mar 2025 at 23:28, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.6.81 release.
> There are 142 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, 07 Mar 2025 17:44:26 +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-6.6.81-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-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Regressions on x86_64 and i386 the defconfig builds failed with clang-20
and gcc-13 the stable-rc v6.6.78-437-g9f243f9dd268

First seen on the v6.6.78-437-g9f243f9dd268
 Good: v6.6.78
 Bad: v6.6.78-437-g9f243f9dd268

* x86_64 and i386, build
  - clang-20-defconfig
  - clang-nightly-defconfig
  - gcc-13-defconfig
  - gcc-8-defconfig

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

Build regression: x86_64 i386  microcode amd.c 'equiv_id' is used uninitialized
Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

## Build log
arch/x86/kernel/cpu/microcode/amd.c:820:6: error: variable 'equiv_id'
is used uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
  820 |         if (x86_family(bsp_cpuid_1_eax) < 0x17) {
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


## Source
* Kernel version: 6.6.81-rc1
* Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* Git sha: 9f243f9dd2684b4b27f8be0cbed639052bc9b22e
* Git describe: v6.6.78-437-g9f243f9dd268
* Project details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.78-437-g9f243f9dd268

## Build
* Build log: https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.78-437-g9f243f9dd268/testrun/27508291/suite/build/test/clang-20-lkftconfig/log
* Build history:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.78-437-g9f243f9dd268/testrun/27508300/suite/build/test/clang-20-lkftconfig/history/
* Build details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.78-437-g9f243f9dd268/testrun/27508291/suite/build/test/clang-20-lkftconfig/
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2tuO7pCGJaGnX0ygcbTOaEDzr9M/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2tuO7pCGJaGnX0ygcbTOaEDzr9M/config

## Steps to reproduce
- tuxmake --runtime podman --target-arch x86_64 --toolchain clang-20
--kconfig defconfig LLVM=1 LLVM_IAS=1

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