kernel: vhost-net: insufficient handling of error conditions in get_rx_bufs()

The getrxbufs function in drivers/vhost/net.c in the vhost-net subsystem in the Linux kernel package before 2.6.32-431.11.2 on Red Hat Enterprise Linux RHEL 6 does not properly handle vhostgetvqdesc errors, which allows guest OS users to cause a denial of service host OS crash via unspecified...