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While this thread is cleaning up the client and connection objects: #2 virFileReadAll (path=0x7f28780012b0 "/proc/1319/stat", maxlen=maxlen@entry=1024, buf=buf@entry=0x7f289c60fc40) at util/virfile.c:1287 #3 0x00007f28adbb1539 in virProcessGetStartTime (pid=<optimized out>, timestamp=timestamp@entry=0x7f289c60fc98) at util/virprocess.c:838 #4 0x00007f28adb91981 in virIdentityGetSystem () at util/viridentity.c:151 #5 0x00007f28ae73f17c in remoteClientFreeFunc (data=<optimized out>) at remote.c:1131 #6 0x00007f28adcb7f33 in virNetServerClientDispose (obj=0x7f28aecad180) at rpc/virnetserverclient.c:858 #7 0x00007f28adba8eeb in virObjectUnref (anyobj=<optimized out>) at util/virobject.c:265 #8 0x00007f28ae74ad05 in virNetServerHandleJob (jobOpaque=<optimized out>, opaque=0x7f28aec93ff0) at rpc/virnetserver.c:205 #9 0x00007f28adbbef4e in virThreadPoolWorker (opaque=opaque@entry=0x7f28aec88030) at util/virthreadpool.c:145 In stack frame #6 the client->identity object got unref'd, but the code that removes the event callbacks in frame #5 did not run yet as we are trying to obtain the system identity (frames #4, #3, #2). In other thead: #0 virObjectUnref (anyobj=anyobj@entry=0x7f288c162c60) at util/virobject.c:264 klass = 0xdeadbeef obj = 0x7f288c162c60 #1 0x00007f28ae71c709 in remoteRelayDomainEventCheckACL (client=<optimized out>, conn=<optimized out>, dom=dom@entry=0x7f28aecaafc0) at remote.c:164 #2 0x00007f28ae71fc83 in remoteRelayDomainEventTrayChange (conn=<optimized out>, dom=0x7f28aecaafc0, ... ) at remote.c:717 #3 0x00007f28adc04e53 in virDomainEventDispatchDefaultFunc (conn=0x7f287c0009a0, event=0x7f28aecab1a0, ...) at conf/domain_event.c:1455 #4 0x00007f28adc03831 in virObjectEventStateDispatchCallbacks (callbacks=<optimized out>, ....) at conf/object_event.c:724 #5 virObjectEventStateQueueDispatch (callbacks=0x7f288c083730, queue=0x7fff51f90030, state=0x7f288c18da20) at conf/object_event.c:738 #6 virObjectEventStateFlush (state=0x7f288c18da20) at conf/object_event.c:816 #7 virObjectEventTimer (timer=<optimized out>, opaque=0x7f288c18da20) at conf/object_event.c:562 #8 0x00007f28adb859cd in virEventPollDispatchTimeouts () at util/vireventpoll.c:459 Frame #0 is unrefing an invalid identity object while frame #2 hints that the client is still dispatching the event. For untrimmed backtrace see the bugzilla attachment. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1203030 (cherry picked from commit a98129c0ee52b6a8fdd39988a6d090057f149ae9)
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>