Hi Matthey,

----- Ursprüngliche Mail -----
> Von: "Matthew Ruffell" <1842...@bugs.launchpad.net>
> An: "burk" <b...@cbs.mpg.de>
> Gesendet: Mittwoch, 11. September 2019 02:44:11
> Betreff: [Bug 1842037] Re: Oops when Kerberos credentials are invalid

> Hi Frank,
> 
> The test kernel has built, and I have tested it to ensure it boots, but
> I now need you to verify that the backported patches fix the issue that
> you are having.
> 
> Can you please install the test kernel onto a system which is having
> problems with NFS clients that are connecting with invalid kerberos
> credentials?
> 
> Please note this kernel is NOT SUPPORTED by Canonical, and is for
> TESTING PURPOSES ONLY. ONLY Install in a dedicated test environment.

thank you for the quick response. I'm deploying the kernel to
a test system right now.

Best regards,

Frank

-- 
Frank Burkhardt <b...@cbs.mpg.de>
IT Dept., Max Planck Institute for Human Cognitive
and Brain Sciences, Leipzig, Germany

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https://bugs.launchpad.net/bugs/1842037

Title:
  Oops when Kerberos credentials are invalid

Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Disco:
  In Progress

Bug description:
  There's a bug in Linux Kernel 5.0 which is triggered by invalid
  credentials when the NFS clients is trying to aquire them via GSSD.
  This affects NFS-Shares that are protected by krb5* security. They
  become unusable until the system is re-booted. The problem is quite
  severe on terminal servers with multiple users - some of them not
  caring about refreshing their kerberos tickets.

  A fix is available here:

  
<https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/sunrpc/clnt.c?id=7987b694ade8cc465ce10fb3dceaa614f13ceaf3>

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