This bug was fixed in upstream Linux and backported to the following Ubuntu linux kernel package revisions:
3.2.0-61 3.5.0-49 3.8.0-39 3.11.0-20
The fix was picked up in the upstream 3.13 tree in March, 2014: http://www.spinics.net/lists/stable/msg37786.html
If you are running a version of the 3.13.0-xx ubuntu package that is from around that time, you should upgrade.
This bug was fixed in upstream Linux and backported to the following Ubuntu linux kernel package revisions:
3.2.0-61
3.5.0-49
3.8.0-39
3.11.0-20
The fix was picked up in the upstream 3.13 tree in March, 2014: http:// www.spinics. net/lists/ stable/ msg37786. html
If you are running a version of the 3.13.0-xx ubuntu package that is from around that time, you should upgrade.