Description of problem:
"virsh attach-disk" fails with this error:
error : qemuMonitorJSONCheckError:382 : internal error: unable to execute QEMU command 'device_add': Property 'virtio-blk-device.drive' can't find value 'drive-virtio-disk22'

/var/log/kern.log relevant content:
audit: type=1400 audit(1447083242.001:2648): apparmor="STATUS" operation="profile_replace" name="libvirt-1528769e-38d7-af29-2398-00005a272ccf" pid=18348 comm="apparmor_parser"
audit: type=1400 audit(1447083242.041:2649): apparmor="STATUS" operation="profile_replace" name="qemu_bridge_helper" pid=18348 comm="apparmor_parser"
audit: type=1400 audit(1447083242.041:2650): apparmor="DENIED" operation="open" profile="libvirt-1528769e-38d7-af29-2398-00005a272ccf" name="/mnt/spool999/storage1/newdisk.raw" pid=16391 comm="kvm" requested_mask="r" denied_mask="r" fsuid=997 ouid=33
audit: type=1400 audit(1447083242.041:2651): apparmor="DENIED" operation="open" profile="libvirt-1528769e-38d7-af29-2398-00005a272ccf" name="/mnt/spool999/storage1/newdisk.raw" pid=16391 comm="kvm" requested_mask="r" denied_mask="r" fsuid=997 ouid=33
audit: type=1400 audit(1447083242.041:2652): apparmor="DENIED" operation="open" profile="libvirt-1528769e-38d7-af29-2398-00005a272ccf" name="/mnt/spool999/storage1/newdisk.raw" pid=16391 comm="kvm" requested_mask="rw" denied_mask="rw" fsuid=997 ouid=33
audit: type=1400 audit(1447083242.661:2653): apparmor="STATUS" operation="profile_replace" name="libvirt-1528769e-38d7-af29-2398-00005a272ccf" pid=18383 comm="apparmor_parser"
audit: type=1400 audit(1447083242.701:2654): apparmor="STATUS" operation="profile_replace" name="qemu_bridge_helper" pid=18383 comm="apparmor_parser"

Version-Release number of selected component (if applicable):
libvirt v1.2.21

How reproducible:
100%

Steps to Reproduce:
1. Run libvirt daemon with AppArmor support, run AppArmor with libvirt profile loaded.
2. # virsh attach-disk <domain> <disk-image> <vdX>

Actual results:
as steps

Expected results:
command should run successfully and XML definition of VM should change accordingly.

Additional info:
libvirt v1.2.21 compiled with AppArmor support and installed on Debian 7.