Comment 3 for bug 1661731

http://logs.openstack.org/48/426448/2/check/gate-tempest-dsvm-neutron-full-ubuntu-xenial/a9e5c36/logs/syslog.txt.gz#_Feb_03_18_50_54

Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 kernel: qbr03d589a9-1f: port 2(tap03d589a9-1f) entered disabled state
Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 kernel: device tap03d589a9-1f left promiscuous mode
Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 kernel: qbr03d589a9-1f: port 2(tap03d589a9-1f) entered disabled state
Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 virtlogd[16840]: End of file while reading data: Input/output error
Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 kernel: qbr03d589a9-1f: port 1(qvb03d589a9-1f) entered disabled state
Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 ovs-vsctl[17486]: ovs|00001|vsctl|INFO|Called as ovs-vsctl --timeout=120 -- --if-exists del-port br-int qvo03d589a9-1f
Feb 03 18:50:54 ubuntu-xenial-bluebox-sjc1-7106549 libvirtd[16812]: *** Error in `/usr/sbin/libvirtd': malloc(): memory corruption: 0x000055fe7d977ca0 ***