Version-Release number of selected component: qemu-system-x86-2.7.0-8.fc25 Additional info: reporter: libreport-2.8.0 backtrace_rating: 4 cmdline: /usr/bin/qemu-system-x86_64 -enable-kvm -machine q35 -m 2G -smp 4 -boot menu=on -drive if=virtio,file=qbpwcf.raw,format=raw -device virtio-net,mac=52:54:00:12:35:90,netdev=userNet -netdev user,id=userNet -device virtio-net,mac=52:54:00:12:35:91,netdev=sockNet -netdev socket,mcast=230.0.0.1:1234,id=sockNet -device virtio-net,mac=52:54:00:12:35:92,netdev=briNet -netdev bridge,br=br0,id=briNet -vga virtio -balloon virtio,deflate-on-oom=true -soundhw all -usb -device virtio-keyboard-pci -device virtio-mouse-pci -device virtio-tablet-pci -device virtio-serial-pci -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev spicevmc,id=spicechannel0,name=vdagent -chardev spiceport,id=charchannel1,name=org.spice-space.webdav.0 -device virtserialport,chardev=charchannel1,id=channel1,name=org.spice-space.webdav.0 -chardev spicevmc,id=spicechannel1,name=aguest -device virtserialport,chardev=spicechannel1,name=org.qemu.guest_agent.0 -chardev spicevmc,name=usbredir,id=usbredirchardev1 -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1,debug=3 -chardev spicevmc,name=usbredir,id=usbredirchardev2 -device usb-redir,chardev=usbredirchardev2,id=usbredirdev2,debug=3 -chardev spicevmc,name=usbredir,id=usbredirchardev3 -device usb-redir,chardev=usbredirchardev3,id=usbredirdev3,debug=3 -chardev spicevmc,name=usbredir,id=usbredirchardev4 -device usb-redir,chardev=usbredirchardev4,id=usbredirdev4,debug=3 -chardev spicevmc,name=usbredir,id=usbredirchardev5 -device usb-redir,chardev=usbredirchardev5,id=usbredirdev5,debug=3 -spice disable-ticketing,image-compression=auto_glz,unix,addr=/tmp/qbpwcf/qemu/qbpwcf-spice.sock -daemonize crash_function: qmp_chardev_add executable: /usr/bin/qemu-system-x86_64 global_pid: 2609 kernel: 4.8.15-300.fc25.x86_64 pkg_fingerprint: 4089 D8F2 FDB1 9C98 pkg_vendor: Fedora Project runlevel: N 5 type: CCpp uid: 1000 Truncated backtrace: Thread no. 1 (4 frames) #4 qmp_chardev_add at /usr/src/debug/qemu-2.7.0/qemu-char.c:4577 #5 qemu_chr_new_from_opts at /usr/src/debug/qemu-2.7.0/qemu-char.c:3925 #6 chardev_init_func at /usr/src/debug/qemu-2.7.0/vl.c:2328 #7 qemu_opts_foreach at /usr/src/debug/qemu-2.7.0/util/qemu-option.c:1116
Created attachment 1238758 [details] File: backtrace
Created attachment 1238759 [details] File: cgroup
Created attachment 1238760 [details] File: core_backtrace
Created attachment 1238761 [details] File: dso_list
Created attachment 1238762 [details] File: environ
Created attachment 1238763 [details] File: limits
Created attachment 1238764 [details] File: maps
Created attachment 1238765 [details] File: mountinfo
Created attachment 1238766 [details] File: namespaces
Created attachment 1238767 [details] File: open_fds
Created attachment 1238768 [details] File: proc_pid_status
Created attachment 1238769 [details] File: var_log_messages
Are you running that qemu command manually, or did it come from some other app? It hit an assert, it should have printed a message to stderr. Can you find that message?