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Description of problem: This happens for me when resuming paused Windows 10 guest in which I run CDK, ie. Vagrant controlled Virtualbox machine with RHEL 7.2. So this is nested virtualization setup: L0 = this RHEL 7.2 host L1 = Windows 10 Enterprise L2 = RHEL 7.2 with Virtualbox 5.0.16 as hypervisor (controlled by Vagrant) It happened to me several times, not sure whether always. Factor could be that between pause/resume of L1 I also suspended L0 (it is my notebook I carry around). Can try to reproduce again if needed - what more debug data would you like? Version-Release number of selected component: qemu-kvm-rhev-2.1.2-23.el7_1.6 Additional info: reporter: libreport-2.1.11 backtrace_rating: 4 cmdline: /usr/libexec/qemu-kvm -name win10ent -S -machine pc-i440fx-rhel7.1.0,accel=kvm,usb=off -cpu SandyBridge,+erms,+smep,+fsgsbase,+rdrand,+f16c,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -m 4096 -mem-prealloc -mem-path /dev/hugepages/libvirt/qemu -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 3c9e2ed3-2c04-403d-82d3-9628bbce70ed -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-win10ent/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/var/lib/libvirt/images/win10ent-1.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/home/dkutalek/install/en_windows_10_enterprise_2015_ltsb_x64_dvd_6848446.iso,if=none,id=drive-ide0-0-1,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive file=/home/dkutalek/install/virtio-win-0.1.113.iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=26,id=hostnet0,vhost=on,vhostfd=27 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:39:ba:37,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on crash_function: spice_chr_add_watch executable: /usr/libexec/qemu-kvm global_pid: 16474 kernel: 3.10.0-327.10.1.el7.x86_64 runlevel: N 5 type: CCpp uid: 107 Truncated backtrace: Thread no. 1 (10 frames) #4 spice_chr_add_watch at spice-qemu-char.c:173 #5 qemu_chr_fe_add_watch at qemu-char.c:3671 #6 usbredir_write at hw/usb/redirect.c:293 #7 usbredirparser_do_write at /lib64/libusbredirparser.so.1 #8 vm_state_notify at vl.c:1714 #9 vm_start at vl.c:751 #10 qmp_cont at qmp.c:177 #11 qmp_marshal_input_cont at qmp-marshal.c:3025 #12 qmp_call_cmd at /usr/src/debug/qemu-2.1.2/monitor.c:5038 #13 handle_qmp_command at /usr/src/debug/qemu-2.1.2/monitor.c:5104
Created attachment 1146757 [details] File: backtrace
Created attachment 1146758 [details] File: cgroup
Created attachment 1146759 [details] File: core_backtrace
Created attachment 1146760 [details] File: dso_list
Created attachment 1146761 [details] File: environ
Created attachment 1146762 [details] File: limits
Created attachment 1146763 [details] File: machineid
Created attachment 1146764 [details] File: maps
Created attachment 1146765 [details] File: open_fds
Created attachment 1146766 [details] File: proc_pid_status
Created attachment 1146767 [details] File: var_log_messages
Created attachment 1146768 [details] File: sosreport.tar.xz
> L0 = this RHEL 7.2 host > Version-Release number of selected component: > qemu-kvm-rhev-2.1.2-23.el7_1.6 ^^^^^^^ This appears to be the RHEL-7.1 version, not RHEL-7.2. Please update qemu, try again and report back. High chance to be a bug 1128992 duplicate, should be fixed in qemu-kvm-rhev-2.3.0-20.el7 and newer.
(In reply to Gerd Hoffmann from comment #14) > > L0 = this RHEL 7.2 host > > > Version-Release number of selected component: > > qemu-kvm-rhev-2.1.2-23.el7_1.6 > ^^^^^^^ > > This appears to be the RHEL-7.1 version, not RHEL-7.2. > Please update qemu, try again and report back. > > High chance to be a bug 1128992 duplicate, > should be fixed in qemu-kvm-rhev-2.3.0-20.el7 and newer. Thanks for hint, I updated the package and crash occurs no more. The problem was hidden in having updated RHEL 7.2 mixed with non updated Openstack source. *** This bug has been marked as a duplicate of bug 1128992 ***