Bug 62011 - [<ffffffffa070d1f3>] ? fscache_object_work_func+0xb3/0x1f0 [fscache] / BUG: unable to handle kernel NULL pointer dereference at 0000000000000002
Summary: [<ffffffffa070d1f3>] ? fscache_object_work_func+0xb3/0x1f0 [fscache] / BUG: u...
Status: NEW
Alias: None
Product: File System
Classification: Unclassified
Component: Other (show other bugs)
Hardware: IA-64 Linux
: P1 normal
Assignee: fs_other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-09-24 10:07 UTC by Raoul Bhatia
Modified: 2013-09-30 11:32 UTC (History)
0 users

See Also:
Kernel Version: 3.11.0
Subsystem:
Regression: No
Bisected commit-id:

Attachments
Missing w1a_oops_20130924.txt (5.38 KB, text/plain)
2013-09-30 11:25 UTC, Raoul Bhatia 		Details
w1a_20130929_multiple_traces.txt (12.82 KB, text/plain)
2013-09-30 11:31 UTC, Raoul Bhatia 		Details
wc01_20130930_multiple_traces.txt (41.16 KB, text/plain)
2013-09-30 11:32 UTC, Raoul Bhatia 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Raoul Bhatia 2013-09-24 10:07:43 UTC 
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.

I have also reported this bug against Ubuntu at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1229643

Thanks,
Raoul
Comment 1 Raoul Bhatia 2013-09-30 11:25:16 UTC 
Created attachment 110021 [details]
Missing w1a_oops_20130924.txt
Comment 2 Raoul Bhatia 2013-09-30 11:31:53 UTC 
Created attachment 110031 [details]
w1a_20130929_multiple_traces.txt

More traces (multiple traces per file!)
from the same system running Kernel 3.12.0-031200rc2-generic from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc2-saucy/ .
Comment 3 Raoul Bhatia 2013-09-30 11:32:11 UTC 
Created attachment 110041 [details]
wc01_20130930_multiple_traces.txt
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