[    2.520374] ip (276) used greatest stack depth: 12352 bytes left
[ 1167.084637] blackhole_netdev_xmit(): Dropping skb.
[ 1167.084714] blackhole_netdev_xmit(): Dropping skb.
[ 1167.084753] blackhole_netdev_xmit(): Dropping skb.
[ 1167.084796] blackhole_netdev_xmit(): Dropping skb.