[    2.093097] ip (246) used greatest stack depth: 12376 bytes left
[    2.814994] ip (280) used greatest stack depth: 12360 bytes left
[    2.869144] ip (284) used greatest stack depth: 12344 bytes left
[   14.920858] ip (1081) used greatest stack depth: 12304 bytes left
[ 1086.259834] blackhole_netdev_xmit(): Dropping skb.
[ 1086.259907] blackhole_netdev_xmit(): Dropping skb.
[ 1086.259955] blackhole_netdev_xmit(): Dropping skb.
[ 1086.260010] blackhole_netdev_xmit(): Dropping skb.
[ 1121.165747] blackhole_netdev_xmit(): Dropping skb.
[ 1121.165800] blackhole_netdev_xmit(): Dropping skb.
[ 1121.165831] blackhole_netdev_xmit(): Dropping skb.
[ 1121.165858] blackhole_netdev_xmit(): Dropping skb.
[ 1205.961036] blackhole_netdev_xmit(): Dropping skb.
[ 1205.961094] blackhole_netdev_xmit(): Dropping skb.
[ 1205.961127] blackhole_netdev_xmit(): Dropping skb.
[ 1205.961167] blackhole_netdev_xmit(): Dropping skb.