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Created attachment 1425948 [details] define nwfilter libvirt.log Hi, after trying define nwfilter all operations with nwfilters are blocked. And the process itself hangs. Steps to Reproduce: 1) cat > /filter.xml << EOF <filter name='test' chain='root'> <uuid>7393984a-5c3a-48ad-ac3c-b9601b7acc45</uuid> <filterref filter='clean-traffic'/> </filter> EOF 2) virsh nwfilter-define filter.xml In gdb, I observe such a thread. It never ends. Thread 17 (Thread 0x7fd737dcb700 (LWP 5170)): #0 0x00007fd744b232ae in pthread_rwlock_wrlock () from /lib64/libpthread.so.0 #1 0x00007fd70ca8d0b9 in nwfilterDefineXML () from /usr/lib64/libvirt/connection-driver/libvirt_driver_nwfilter.so #2 0x00007fd7478d035e in virNWFilterDefineXML () from /lib64/libvirt.so.0 #3 0x00005612cabca64b in remoteDispatchNWFilterDefineXMLHelper () #4 0x00007fd7477e4d15 in virNetServerProgramDispatch () from /lib64/libvirt.so.0 #5 0x00007fd7477eb52d in virNetServerHandleJob () from /lib64/libvirt.so.0 #6 0x00007fd747727011 in virThreadPoolWorker () from /lib64/libvirt.so.0 #7 0x00007fd747726398 in virThreadHelper () from /lib64/libvirt.so.0 #8 0x00007fd744b1fe25 in start_thread () from /lib64/libpthread.so.0 #9 0x00007fd74484d34d in clone () from /lib64/libc.so.6
Compiled against library: libvirt 4.3.0 Using library: libvirt 4.3.0 Using API: QEMU 4.3.0 Running hypervisor: QEMU 1.5.3 CentOS Linux release 7.4.1708 (Core)
Can you install the libvirt debuginfo packages, then attach the output of "thread apply all bt" in gdb?
Closing old bug since the need info was not responded to.