CVE-2013-2218 -- libvirt: crash when listing network interfaces with filters

[Petr Matousek <pmatouse () redhat com>]

The virConnectListAllInterfaces method has a double-free of the
'struct netcf_if' object when any of the filtering flags cause
an interface to be skipped over. For example when running the
command 'virsh iface-list --inactive'

Upstream fix:
http://libvirt.org/git/?p=libvirt.git;a=commit;h=244e0b8cf15ca2ef48d82058e728656e6c4bad11

References:
https://bugzilla.redhat.com/show_bug.cgi?id=980112

Thanks,
-- 
Petr Matousek / Red Hat Security Response Team