Description of problem: Just try start VM im gnome-boxes Version-Release number of selected component: qemu-system-x86-2.4.0-0.1.rc0.fc23 Additional info: reporter: libreport-2.6.2 backtrace_rating: 4 cmdline: /usr/bin/qemu-system-x86_64 -machine accel=kvm -name fedora-unkno-2 -S -machine pc-i440fx-2.3,accel=kvm,usb=off -cpu Haswell-noTSX -m 2048 -realtime mlock=off -smp 8,sockets=1,cores=4,threads=2 -uuid 91bc512d-403c-4718-ba7b-b98aa183aaa2 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/home/mikhail/.config/libvirt/qemu/lib/fedora-unkno-2.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,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 -device usb-ccid,id=ccid0 -drive file=/home/mikhail/.local/share/gnome-boxes/images/fedora-unkno-2,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/mikhail/Downloads/Fedora-Live-Workstation-i686-23_Alpha-TC2.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=21,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:8c:c3:46,bus=pci.0,addr=0x3 -chardev spicevmc,id=charsmartcard0,name=smartcard -device ccid-card-passthru,chardev=charsmartcard0,id=smartcard0,bus=ccid0.0 -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 -device usb-mouse,id=input1 -device usb-kbd,id=input2 -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 AC97,id=sound0,bus=pci.0,addr=0x4 -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 -chardev spicevmc,id=charredir2,name=usbredir -device usb-redir,chardev=charredir2,id=redir2 -chardev spicevmc,id=charredir3,name=usbredir -device usb-redir,chardev=charredir3,id=redir3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on crash_function: object_dynamic_cast_assert executable: /usr/bin/qemu-system-x86_64 global_pid: 28853 kernel: 4.2.0-0.rc5.git0.2.fc23.x86_64 runlevel: N 5 type: CCpp uid: 1000 Truncated backtrace: Thread no. 1 (10 frames) #2 object_dynamic_cast_assert at qom/object.c:581 #3 ccid_card_init at hw/usb/dev-smartcard-reader.c:1292 #4 device_realize at hw/core/qdev.c:227 #5 device_set_realized at hw/core/qdev.c:1046 #6 property_set_bool at qom/object.c:1667 #7 object_property_set_qobject at qom/qom-qobject.c:24 #8 object_property_set_bool at qom/object.c:1015 #9 qdev_device_add at qdev-monitor.c:599 #10 device_init_func at vl.c:2300 #11 qemu_opts_foreach at util/qemu-option.c:1089
Created attachment 1060603 [details] File: backtrace
Created attachment 1060604 [details] File: cgroup
Created attachment 1060605 [details] File: core_backtrace
Created attachment 1060606 [details] File: dso_list
Created attachment 1060607 [details] File: environ
Created attachment 1060608 [details] File: limits
Created attachment 1060609 [details] File: maps
Created attachment 1060610 [details] File: mountinfo
Created attachment 1060611 [details] File: namespaces
Created attachment 1060612 [details] File: open_fds
Created attachment 1060613 [details] File: proc_pid_status
Almost 30 faf hits at time of writing Mikhail or anyone that can reproduce, can you attach ~/.cache/libvirt/qemu/log/$vmname.log ?
I wonder if this is fixed by: commit cfda2cef3d0320d7a133600ffdb6e33547aaba8f Author: Gerd Hoffmann <kraxel> Date: Fri Jul 17 11:34:11 2015 +0200 usb-ccid: fix 61b4887b41b270bc837ead57bc502d904af023bb Which is building for f23 now, as part of qemu-v2.4.0-rc4
Created attachment 1060783 [details] boxes.log
Thanks, the error is: hw/usb/dev-smartcard-reader.c:1292:ccid_card_init: Object 0x55be3659c000 is not an instance of type usb-device My guess is that the referenced commit fixes it... but I just noticed my qemu-2.4.0-rc4 build failed with some dep issue in the repos, so it'll have to wait a bit
qemu-2.4.0-rc4 is built and queued for f23 update, please try that and let me know if it still crashes
Thanks, after updating qemu to version 2.4.0-rc4 the problem is disappeared.
Thanks Mikhail