Re: [PATCH 6.14 000/449] 6.14.3-rc1 review

[Dan Carpenter <dan.carpenter@linaro.org>]

On Fri, Apr 18, 2025 at 01:23:27PM +0530, Naresh Kamboju wrote:
> On Thu, 17 Apr 2025 at 23:23, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > This is the start of the stable review cycle for the 6.14.3 release.
> > There are 449 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 Sat, 19 Apr 2025 17:49:48 +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-6.14.3-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-6.14.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> 
> Regressions on arm64 dragonboard 410c boot failed with lkftconfig on
> the stable rc
> 6.14.3-rc1. While booting, the following kernel warnings were noticed
> and boot failed.
> 
> First seen on the 6.14.3-rc1
> Good: v6.14.2
> Bad:  v6.14.2-450-g0e7f2bba84c1
> 
> Regressions found on arm64 dragonboard 410c:
> - Boot/clang-20-lkftconfig
> 
> Regression Analysis:
> - New regression? Yes
> - Reproducibility? Yes
> 
> Boot regression: arm64 dragonboard 410c WARNING regulator core.c regulator_put
> 
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> 
> ## Boot log arm64 dragonboard 410c
> [    3.924339]  remoteproc:smd-edge: failed to parse smd edge
> [    4.051490] msm_hsusb 78d9000.usb: Failed to create device link
> (0x180) with supplier remoteproc for /soc@0/usb@78d9000/ulpi/phy
> [    4.055155] qcom-clk-smd-rpm
> remoteproc:smd-edge:rpm-requests:clock-controller: Error registering
> SMD clock driver (-1431655766)
> [    4.062274] qcom-clk-smd-rpm
> remoteproc:smd-edge:rpm-requests:clock-controller: probe with driver
> qcom-clk-smd-rpm failed with error -1431655766
                                     ^^^^^^^^^^^
This is 0xaaaaaaaa which is very suspicious.

We recently changed out test configs to use
CONFIG_INIT_STACK_ALL_PATTERN=y (my fault) and the documentation says
that 0xaaaaaaaa is the default uninitialized variable pattern for
Clang 64bit.  So it's possible that this is not a regression but an
older bug which is only detected with that config change.  Could
you try again with CONFIG_INIT_STACK_ALL_ZERO=y instead?

However, I don't see how this can be stack data.

This error code is from qcom_rpm_smd_write() and I'm pretty sure
it's from the ret = rpm->ack_status; assignment and it's supposed
to be zero.

regards,
dan carpenter