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Bug#1098698: linux: Segfault and system hang on larger network file transfers

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Hi Paul,

On Sat, Mar 01, 2025 at 08:21:58AM -0500, Paul DeKraker wrote:
> Here is a log collected via netconsole.
> 
> Thanks,
> Paul
> 
> On Thu, Feb 27, 2025 at 11:39 AM Salvatore Bonaccorso <carnil@debian.org>
> wrote:
> 
> > Hi Paul,
> >
> > On Mon, Feb 24, 2025 at 09:12:43PM -0500, Paul DeKraker wrote:
> > > I just tried 6.12.16 and as with 6.12.15 the system locks up / becomes
> > > completely unresponsive and needs to be hard reset when attempting a
> > large
> > > transfer from a network share to the local computer, so this probably is
> > a
> > > separate issue. If there is something more I can do to capture this
> > > behavior please let me know.
> >
> > Thanks for confirming. Yes now we have to get to fresh logs. As I
> > understand you cannot access the system (not even remotely via SSH) to
> > gather the kernel logs after the issue appears?
> >
> > In this case we might be successfull if you attach a netconsole and
> > have another system available which can capture the logs.
> > Documentation can be found here:
> >
> > https://www.kernel.org/doc/html/latest/networking/netconsole.html#netconsole
> >
> > Would you be able to try that and provide fresh logs for the recent
> > 6.12.y kernels?

Thanks a lot for the log, this was very helpful. At first glance it
looks like this issue:
https://lore.kernel.org/netfs/CAKPOu+_4mUwYgQtRTbXCmi+-k3PGvLysnPadkmHOyB7Gz0iSMA@mail.gmail.com/

There is a submitted patch but it does not look like it got applied
already, checking.

Might you be able to test the patch from
https://lore.kernel.org/netfs/20250210191118.3444416-1-max.kellermann@ionos.com/
to see if it fixes the issue?

You can follow the procedure in
https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#id-1.6.6.4
to do the "simple patching and building".

Regards,
Salvatore

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Bug#1098698: linux: Segfault and system hang on larger network file transfers Paul DeKraker <pdekraker+debbug@gmail.com> - 2025-02-22 22:40 +0100
  Bug#1098698: linux: Segfault and system hang on larger network file transfers Salvatore Bonaccorso <carnil@debian.org> - 2025-02-23 16:40 +0100
    Bug#1098698: linux: Segfault and system hang on larger network file transfers Paul DeKraker <pdekraker@gmail.com> - 2025-02-25 03:20 +0100
      Bug#1098698: linux: Segfault and system hang on larger network file transfers Salvatore Bonaccorso <carnil@debian.org> - 2025-02-27 17:50 +0100
  Bug#1098698: linux: Segfault and system hang on larger network file transfers Salvatore Bonaccorso <carnil@debian.org> - 2025-03-01 15:20 +0100
  Bug#1098698: linux: Segfault and system hang on larger network file transfers Norbert Lange <nolange79@gmail.com> - 2025-03-07 17:10 +0100

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