on current factory, I see several somehow following errors from libvirtd when
using current kernel-head - kernel 3.18.0-rc6-1.g961dff7-default,
qemu-2.1.0-2.4):
Dec 01 18:47:23 medusa libvirtd[1476]: Module
/usr/lib64/libvirt/connection-driver/libvirt_driver_vbox_network.so not
accessible
Dec 01 18:47:23 medusa libvirtd[1476]: Module
/usr/lib64/libvirt/connection-driver/libvirt_driver_vbox_storage.so not
accessible
Dec 01 18:47:23 medusa libvirtd[1476]: Module
/usr/lib64/libvirt/connection-driver/libvirt_driver_libxl.so not accessible
Dec 01 18:47:23 medusa libvirtd[1476]: Module
/usr/lib64/libvirt/connection-driver/libvirt_driver_lxc.so not accessible
Dec 01 18:47:23 medusa libvirtd[1476]: Module
/usr/lib64/libvirt/connection-driver/libvirt_driver_uml.so not accessible
Dec 01 18:47:23 medusa libvirtd[1476]: Module
/usr/lib64/libvirt/connection-driver/libvirt_driver_vbox.so not accessible
Dec 01 18:47:32 medusa libvirtd[1476]: internal error: early end of file from
monitor: possible problem:
                                       2014-12-01T17:47:32.313035Z
qemu-system-x86_64: Features 0x300fffe3 unsupported. Allowed features:
0x79bfbbe7
                                       qemu: warning: error while loading state
for instance 0x0 of device '0000:00:03.0/virtio-net'
                                       2014-12-01T17:47:32.313160Z
qemu-system-x86_64: load of migration failed: Operation not permitted
Dec 01 18:47:32 medusa libvirtd[1476]: error from service: TerminateMachine: No
machine 'qemu-sles11sp3' known
Dec 01 18:47:32 medusa libvirtd[1476]: failed to restore save state label on
/var/lib/libvirt/qemu/save/sles11sp3.save
Dec 01 18:47:32 medusa libvirtd[1476]: Unable to restore from managed state
/var/lib/libvirt/qemu/save/sles11sp3.save. Maybe the file is corrupted?

virsh # start sles11sp3
error: Failed to start domain sles11sp3
error: internal error: early end of file from monitor: possible problem:
2014-12-01T18:10:48.857906Z qemu-system-x86_64: Features 0x300fffe3
unsupported. Allowed features: 0x79bfbbe7
qemu: warning: error while loading state for instance 0x0 of device
'0000:00:03.0/virtio-net'
2014-12-01T18:10:48.858046Z qemu-system-x86_64: load of migration failed:
Operation not permitted

# dmesg|tail
[   50.768895] device vnet0 left promiscuous mode
[   50.768920] br0: port 2(vnet0) entered disabled state
[  226.746575] IPv4: martian source 255.255.255.255 from 127.0.0.1, on dev br0
[  226.746591] ll header: 00000000: ff ff ff ff ff ff 52 54 00 34 90 7a 08 00  
     ......RT.4.z..
[ 1446.752186] device vnet0 entered promiscuous mode
[ 1446.764231] br0: port 2(vnet0) entered forwarding state
[ 1446.764242] br0: port 2(vnet0) entered forwarding state
[ 1447.313557] br0: port 2(vnet0) entered disabled state
[ 1447.313829] device vnet0 left promiscuous mode
[ 1447.313856] br0: port 2(vnet0) entered disabled state

vm is running without issues with current stable kernel from factory (3.17.2)