Created attachment 1821935 [details]
libvirtd.log

Description of problem:
Unexpectedly failed when managedsave/dump/snapshot-create --xmlfile the guest which has qxl video device

Version-Release number of selected component (if applicable):
libvirt-7.6.0-2.module+el8.6.0+12490+ec3e565c.x86_64
qemu-kvm-6.1.0-1.module+el8.6.0+12535+4e2af250.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Prepare a running guest with qxl video:
# virsh dumpxml avocado-vt-vm1 | grep /video -B4
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    </video>
2. Managedsave the guest.
# virsh managedsave avocado-vt-vm1
error: Failed to save domain 'avocado-vt-vm1' state
error: operation failed: domain save job: unexpectedly failed
3. Dump the guest.
# virsh dump avocado-vt-vm1 /tmp/test
error: Failed to core dump domain 'avocado-vt-vm1' to /tmp/test
error: operation failed: domain core dump job: unexpectedly failed
4) Create the snapshot with xml file.
# virsh snapshot-create avocado-vt-vm1 snapshot.xml
error: operation failed: snapshot job: unexpectedly failed

Actual results:
Managedsave the guest failed

Expected results:
Managedsave the guest successfully

Additional info:
1) Can't reproduce in libvirt-7.6.0-2.module+el8.6.0+12490+ec3e565c.x86_64 and qemu-kvm-6.0.0-29.module+el8.6.0+12490+ec3e565c.x86_64. 
2) Qxl video is still using in RHV
3) The simple log(the detailed log is in attachment):
2021-09-10 02:31:49.227+0000: 141267: debug : qemuMonitorJSONIOProcessEvent:206 : handle MIGRATION handler=0x7fded83dd450 data=0x7fdea410a110
2021-09-10 02:31:49.227+0000: 141267: debug : qemuMonitorEmitMigrationStatus:1400 : mon=0x7fdf0c069300, status=failed
2021-09-10 02:31:49.227+0000: 141267: debug : qemuProcessHandleMigrationStatus:1584 : Migration of domain 0x7fdeb44df030 avocado-vt-vm1 changed state to failed
2021-09-10 02:31:49.227+0000: 87202: debug : qemuDomainObjBeginJobInternal:845 : Starting job: job=async nested agentJob=none asyncJob=none (vm=0x7fdeb44df030 name=avocado-vt-vm1, current job=none agentJob=none async=save)
2021-09-10 02:31:49.227+0000: 87202: debug : qemuDomainObjBeginJobInternal:892 : Started job: async nested (async=save vm=0x7fdeb44df030 name=avocado-vt-vm1)
2021-09-10 02:31:49.227+0000: 87202: debug : qemuDomainObjEnterMonitorInternal:5988 : Entering monitor (mon=0x7fdf0c069300 vm=0x7fdeb44df030 name=avocado-vt-vm1)
2021-09-10 02:31:49.227+0000: 87202: debug : qemuMonitorGetMigrationStats:2419 : mon:0x7fdf0c069300 vm:0x7fdeb44df030 fd:56
2021-09-10 02:31:49.227+0000: 87202: info : qemuMonitorSend:960 : QEMU_MONITOR_SEND_MSG: mon=0x7fdf0c069300 msg={"execute":"query-migrate","id":"libvirt-410"}^M
 fd=-1
2021-09-10 02:31:49.227+0000: 141267: info : qemuMonitorIOWrite:438 : QEMU_MONITOR_IO_WRITE: mon=0x7fdf0c069300 buf={"execute":"query-migrate","id":"libvirt-410"}^M
 len=48 ret=48 errno=0
2021-09-10 02:31:49.228+0000: 141267: debug : qemuMonitorJSONIOProcessLine:220 : Line [{"return": {"status": "failed"}, "id": "libvirt-410"}]
2021-09-10 02:31:49.228+0000: 141267: info : qemuMonitorJSONIOProcessLine:240 : QEMU_MONITOR_RECV_REPLY: mon=0x7fdf0c069300 reply={"return": {"status": "failed"}, "id": "libvirt-410"}
2021-09-10 02:31:49.228+0000: 87202: debug : qemuDomainObjExitMonitorInternal:6013 : Exited monitor (mon=0x7fdf0c069300 vm=0x7fdeb44df030 name=avocado-vt-vm1)
2021-09-10 02:31:49.228+0000: 87202: debug : qemuDomainObjEndJob:1145 : Stopping job: async nested (async=save vm=0x7fdeb44df030 name=avocado-vt-vm1)
2021-09-10 02:31:49.228+0000: 87202: error : qemuMigrationJobCheckStatus:1744 : operation failed: domain save job: unexpectedly failed