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[Bug 1229643] [NEW] [<ffffffffa070d1f3>] ? fscache_object_work_func+0xb3/0x1f0 [fscache] / BUG: unable to handle kernel NULL pointer dereference at 0000000000000002

 

Public bug reported:

I encountered an kernel trace regarding Cachefilesd running
3.11.0-7-generic #13-Ubuntu SMP Tue Sep 10 20:55:38 UTC 2013 x86_64
GNU/Linux under Debian Squeeze 6.0.7 amd64 on an Opteron barebone.

This server is an NFS client using cachefilesd.

The NFS server is Debian Squeeze 6.0.7 amd64 running 3.2.0-0.bpo.4-amd64
#1 SMP Debian 3.2.46-1~bpo60+1 x86_64 GNU/Linux and nfs-kernel-server on
an Opteron barebone as well.

No kerberos is in use.

The system is basically the same as in Bug #1225494 . However, named bug
is regarding a problem with nfs_idmap whereas this seems to be a problem
with fscache.

The trace is attached.

Thanks,
Raoul

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "w1a_oops_20130924.txt"
   https://bugs.launchpad.net/bugs/1229643/+attachment/3837864/+files/w1a_oops_20130924.txt

** Bug watch added: Linux Kernel Bug Tracker #62011
   http://bugzilla.kernel.org/show_bug.cgi?id=62011

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https://bugs.launchpad.net/bugs/1229643

Title:
  [<ffffffffa070d1f3>] ? fscache_object_work_func+0xb3/0x1f0 [fscache] /
  BUG: unable to handle kernel NULL pointer dereference at
  0000000000000002

Status in “linux” package in Ubuntu:
  New

Bug description:
  I encountered an kernel trace regarding Cachefilesd running
  3.11.0-7-generic #13-Ubuntu SMP Tue Sep 10 20:55:38 UTC 2013 x86_64
  GNU/Linux under Debian Squeeze 6.0.7 amd64 on an Opteron barebone.

  This server is an NFS client using cachefilesd.

  The NFS server is Debian Squeeze 6.0.7 amd64 running
  3.2.0-0.bpo.4-amd64 #1 SMP Debian 3.2.46-1~bpo60+1 x86_64 GNU/Linux
  and nfs-kernel-server on an Opteron barebone as well.

  No kerberos is in use.

  The system is basically the same as in Bug #1225494 . However, named
  bug is regarding a problem with nfs_idmap whereas this seems to be a
  problem with fscache.

  The trace is attached.

  Thanks,
  Raoul

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