[   22.827466] ip (2216) used greatest stack depth: 12296 bytes left
[ 1088.060612] blackhole_netdev_xmit(): Dropping skb.
[ 1088.060680] blackhole_netdev_xmit(): Dropping skb.
[ 1088.060710] blackhole_netdev_xmit(): Dropping skb.
[ 1088.060735] blackhole_netdev_xmit(): Dropping skb.
[ 1104.800296] blackhole_netdev_xmit(): Dropping skb.
[ 1104.800351] blackhole_netdev_xmit(): Dropping skb.
[ 1104.800382] blackhole_netdev_xmit(): Dropping skb.
[ 1104.800413] blackhole_netdev_xmit(): Dropping skb.