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Message-ID: <CA+G9fYs_6KYHSF6eyeFmewDxYGqqD70kO1DuB0_1qwCPV2LjOg@mail.gmail.com>
Date: Tue, 22 Jul 2025 23:06:26 +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 6.15 000/187] 6.15.8-rc1 review
On Tue, 22 Jul 2025 at 19:37, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.15.8 release.
> There are 187 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-6.15.8-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-6.15.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
Regressions while building allyesconfig build for arm64 and x86 with the
toolchain clang-nightly version 22.0.0.
Regression Analysis:
- New regression? Yes
- Reproducibility? Yes
Build regression: arm64 x86 mm ksm.c error variable 'output' is used
uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
Build regression: arm64 x86 samsung s5p_mfc_cmd_v6.c error variable
'h2r_args' is uninitialized when passed as a const pointer argument
here
Build regression: arm64 x86 mediatek mcu.c error variable 'hdr' is
uninitialized when passed as a const pointer argument here
Build regression: arm64 x86 broadcom phy_lcn.c error variable
'diq_start' is uninitialized when passed as a const pointer argument
here
Build regression: arm64 x86 usb cxacru.c error variable 'bp' is used
uninitialized whenever 'if' condition is false
Build regression: arm64 x86 drm dpu_plane.c error variable
'crtc_state' is used uninitialized whenever 'if' condition is false
Build regression: arm64 x86 drm amdgpu imu_v12_0.c error variable
'data' is uninitialized when used here
Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
## Build log
mm/ksm.c:3674:11: error: variable 'output' is used uninitialized
whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
3674 | else if (ksm_advisor == KSM_ADVISOR_SCAN_TIME)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/samsung/s5p-mfc/s5p_mfc_cmd_v6.c:45:7: error:
variable 'h2r_args' is uninitialized when passed as a const pointer
argument here [-Werror,-Wuninitialized-const-pointer]
45 | &h2r_args);
| ^~~~~~~~
drivers/media/platform/samsung/s5p-mfc/s5p_mfc_cmd_v6.c:133:7: error:
variable 'h2r_args' is uninitialized when passed as a const pointer
argument here [-Werror,-Wuninitialized-const-pointer]
133 | &h2r_args);
| ^~~~~~~~
drivers/media/platform/samsung/s5p-mfc/s5p_mfc_cmd_v6.c:148:7: error:
variable 'h2r_args' is uninitialized when passed as a const pointer
argument here [-Werror,-Wuninitialized-const-pointer]
148 | &h2r_args);
| ^~~~~~~~
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:3365:21: error:
variable 'hdr' is uninitialized when passed as a const pointer
argument here [-Werror,-Wuninitialized-const-pointer]
3365 | skb_put_data(skb, &hdr, sizeof(hdr));
| ^~~
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:1875:21: error:
variable 'hdr' is uninitialized when passed as a const pointer
argument here [-Werror,-Wuninitialized-const-pointer]
1875 | skb_put_data(skb, &hdr, sizeof(hdr));
| ^~~
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_lcn.c:2728:13:
error: variable 'diq_start' is uninitialized when passed as a const
pointer argument here [-Werror,-Wuninitialized-const-pointer]
2728 |
&diq_start, 1, 16, 69);
| ^~~~~~~~~
drivers/usb/atm/cxacru.c:1104:6: error: variable 'bp' is used
uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
1104 | if (instance->modem_type->boot_rom_patch) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c:1066:6: error: variable
'crtc_state' is used uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
1066 | if (plane_state->crtc)
| ^~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/imu_v12_0.c:374:30: error: variable 'data'
is uninitialized when used here [-Werror,-Wuninitialized]
374 | program_imu_rlc_ram(adev, data, (const
u32)size);
| ^~~~
## Source
* Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* Git sha: 81bcc8b99854ba689a8c85fb1d39d5acdce0385a
* Git describe: v6.15.7-188-g81bcc8b99854
* 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-6.15.y/v6.15.7-188-g81bcc8b99854/build/clang-nightly-allyesconfig/
* Build run: https://regressions.linaro.org/lkft/linux-stable-rc-linux-6.15.y/v6.15.7-188-g81bcc8b99854/testruns/1699830/
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/30EaSfe4S6Pi4zE2kv1TGQcGByr/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/30EaSfe4S6Pi4zE2kv1TGQcGByr/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
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