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

Naresh Kamboju
2025-03-06T14:06:27Z

On Wed, 5 Mar 2025 at 23:28, Greg Kroah-Hartman
<gregkh@linuxfoundation.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@linaro.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