[    2.043978] ip (246) used greatest stack depth: 12376 bytes left
[    2.079288] ip (249) used greatest stack depth: 12328 bytes left
[  784.368246] blackhole_netdev_xmit(): Dropping skb.
[  784.368326] blackhole_netdev_xmit(): Dropping skb.
[  784.368378] blackhole_netdev_xmit(): Dropping skb.
[  784.368423] blackhole_netdev_xmit(): Dropping skb.
[ 1025.931697] blackhole_netdev_xmit(): Dropping skb.
[ 1025.931764] blackhole_netdev_xmit(): Dropping skb.
[ 1025.931802] blackhole_netdev_xmit(): Dropping skb.
[ 1025.931837] blackhole_netdev_xmit(): Dropping skb.