Comment # 3 on bug 908007 from C�dric Bosdonnat

(In reply to James Fehlig from comment #2)
> (In reply to Charles Arnold from comment #1)
> > Jim,
> > Is this issue addressed with recent libvirt fixes for migration?
> 
> No, but might be related to recent changes in the security driver
> configuration.  Cedric, can you take a look?

That really looks like the default changes for qemu security driver could fix
that. Do you have the following change in your libvirt installations? 

> Tue Nov 18 17:21:55 UTC 2014 - cbosdonnat@suse.com
>
> - Remove security_driver = "none" in qemu config. This completely
>  disabled all security drivers instead of probing them.
> - Changed default value of QEMU's security_default_confined to 0 to
>  keep QEMU domains unconfined by default.

In any case, it would be good to check /etc/libvirt/qemu.conf file to:
  * not have the line security_driver = "none"
  * have security_default_confined = 0 or 0 set as a default value for it.