A temporary workaround in my case is to:
1/ add the denied file in the Template /etc/apparmor.d/libvirt/TEMPLATE :
"/U/libvirt-image/base/lenny_compressed.qcow2" r,
2/ Remove the generated file /etc/apparmor.d/libvirt/libvirt-c05e04f2-fe2e-b8de-c129-bd074c908476*
3/ Reload apparmor and start the VM
A temporary workaround in my case is to: d/libvirt/ TEMPLATE : image/base/ lenny_compresse d.qcow2" r, d/libvirt/ libvirt- c05e04f2- fe2e-b8de- c129-bd074c9084 76*
1/ add the denied file in the Template /etc/apparmor.
"/U/libvirt-
2/ Remove the generated file /etc/apparmor.
3/ Reload apparmor and start the VM