qemu segfault when starting virt-manager libvirtd 1.2.3 virt-manager 1.0.1 qemu 1.7.92 (2.0.0-rc2) 1. Initially virt-manager is NOT running 2. I start a VM manually using "virsh start ...", causing a qemu instance to be run as /usr/bin/qemu-system-x86_64 -machine accel=kvm -name Zeus_Virtualized -S -machine pc-i440fx-2.0,accel=kvm,usb=off -cpu Penryn -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 6384b4d2-1c58-4595-bce2-b248230e2c9c -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/Zeus_Virtualized.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=0x4.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x4 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x4.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x4.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/home/pief/libvirt VMs/Zeus_Virtualized_USBStick.qcow2,if=none,id=drive-usb-disk0,format=qcow2 -device usb-storage,drive=drive-usb-disk0,id=usb-disk0,removable=off -drive file=/home/pief/isos/openSUSE-13.1-DVD-x86_64.iso,if=none,id=drive-ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive file=/home/pief/libvirt VMs/Zeus_Virtualized_HDD1.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0 -drive file=/home/pief/libvirt VMs/Zeus_Virtualized_HDD2.qcow2,if=none,id=drive-virtio-disk1,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk1,id=virtio-disk1 -drive file=/home/pief/libvirt VMs/Zeus_Virtualized_SSD.qcow2,if=none,id=drive-virtio-disk2,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk2,id=virtio-disk2,bootindex=2 -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 -vnc 127.0.0.1:0 -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x3 -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 -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=0x9 3. I start virt-manager (just starting it, nothing special). 4. The qemu instance segfaults with the attached backtrace. No crash BTW if virt-manager is started first and THEN "virsh start..." is executed. Judging by the backtrace this is the bug fixed by commit 92b3eeadd9bc, which is in current git master and will be in the imminent 2.0.0-rc3. Fix is already queued for qemu 2.0 GA commit 92b3eeadd9bc72f1f4e5ba1f62a289dc0190e88f Author: Cole Robinson