Comment 3 for bug 595438

Could you try and run this in GDB and get the backtrace when it crashes?
Just do:

gdb /usr/bin/kvm
(gdb) set args -M pc-0.12 -enable-kvm -m 256 -smp 1 -name spamsender -uuid b9cacd5e-08f7-41fd-78c8-89cec59af881 -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/spamsender.monitor,server,nowait -monitor chardev:monitor -boot d -drive file=/mnt/megadiff/cdiso_400_130.iso,if=ide,media=cdrom,index=2 -drive file=/home/mmarkk/spamsender2.img,if=scsi,index=0,format=qcow2,cache=writeback -net nic,macaddr=00:00:00:00:00:00,vlan=0,name=nic.0 -net tap,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc 127.0.0.1:0 -vga cirrus
(gdb) run
<after crash>
(gdb) bt

Make sure to have all the debug packages installed, otherwise the backtrace isn't really useful.

Unfortunately the core file you posted isn't of use to anyone who doesn't have Ubuntu installed with the exact packages you have installed. It just shows some random addresses in gdb.

Thanks,
Jes