[    1.983049] ip (242) used greatest stack depth: 12304 bytes left
[ 1225.383996] blackhole_netdev_xmit(): Dropping skb.
[ 1225.384075] blackhole_netdev_xmit(): Dropping skb.
[ 1225.384118] blackhole_netdev_xmit(): Dropping skb.
[ 1225.384161] blackhole_netdev_xmit(): Dropping skb.