This bug was fixed in the package libvirt - 1.2.2-0ubuntu13.1.9
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libvirt (1.2.2-0ubuntu13.1.9) trusty-proposed; urgency=medium
* apparmor libvirt-qemu template: allow reading charm-specific ceph config
and allow reading under /tmp and /var/tmp (for SRU only) (LP: #1403648)
** Also affects: libvirt (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: libvirt (Ubuntu)
Status: New => Fix Released
** Changed in: libvirt (Ubuntu Trusty)
Status: New => Confirmed
** Changed in: libvirt (Ubuntu Trusty)
Importance: Undecided => High