** Tags added: qemu-19.10 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1812822
Title: Guest crashed when detaching the ovs interface device Status in Ubuntu on IBM z Systems: Incomplete Status in linux package in Ubuntu: Incomplete Status in qemu package in Ubuntu: Incomplete Bug description: When detaching one openvswitch interface device with virsh detach-device, if the port has been deleted from the ovs and the interface device has been deleted. The virsh detach-device will fail with "error: Unable to read from monitor: Connection reset by peer", the qemu is terminated and the log shows " UNSETVNETLE ioctl() failed, File descriptor in bad state". [Background] This error is originally found from the openstack KVM CI tempest test. By investigating I found it's introduced by one ovs-vif patch, which deletes the ovs port and delete the interface before detaching the device. You can find the commit from https://bugs.launchpad.net/os-vif/+bug/1801072 Reproduced: root@xxxx:~# ovs-vsctl del-port br0 tap9273235a-dd root@xxxx:~# ip link del tap9273235a-dd The interface device tap9273235a-dd has been removed from the host(ifconfg, ovs-vsctl show) and can be found in the guest.(logon the guest, ip a it's in down state) root@xxxx:~# virsh detach-device kvm net.xml error: Failed to detach device from net.xml error: Unable to read from monitor: Connection reset by peer The qemu has terminated and the log in /var/log/libvirt/qemu/kvm.log TUNSETVNETLE ioctl() failed: File descriptor in bad state. 2019-01-18 08:16:11.304+0000: shutting down, reason=crashed It seems the qemu tried to handle this interface, but in fact it has been deleted. qemu couldn't read the file and give the error. But I don't think the guest should be crashed directly for the file descriptor error. Environment: Ubuntu 16.04.5 LTS Linux (EC12) 4.4.0-141-generic QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.5~cloud0) libvirtd (libvirt) 4.0.0 net.xml <interface type='bridge'> <mac address='52:54:00:fb:5c:46'/> <source bridge='br0'/> <virtualport type='openvswitch'> <parameters interfaceid='9273234d-9ad4-4ecf-8869-d63ac17a0e6d'/> </virtualport> <target dev='tap9273235a-dd'/> <model type='virtio'/> <mtu size='1450'/> <alias name='net1'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0005'/> </interface> kvm.xml <domain type='kvm' id='31'> <name>kvm</name> <uuid>59f71b47-16e4-401d-9d33-30bc1605a84a</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu placement='static'>1</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='s390x' machine='s390-ccw-virtio-bionic'>hvm</type> <boot dev='hd'/> </os> <cpu> <topology sockets='1' cores='1' threads='1'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-s390x</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/root/xenial-minimal.qcow2'/> <backingStore/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0000'/> </disk> <console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target type='sclp' port='0'/> <alias name='console0'/> </console> <memballoon model='virtio'> <alias name='balloon0'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/> </memballoon> <panic model='s390'/> </devices> <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-59f71b47-16e4-401d-9d33-30bc1605a84a</label> <imagelabel>libvirt-59f71b47-16e4-401d-9d33-30bc1605a84a</imagelabel> </seclabel> <seclabel type='dynamic' model='dac' relabel='yes'> <label>+0:+0</label> <imagelabel>+0:+0</imagelabel> </seclabel> </domain> To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1812822/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
