[    2.674375] ip (278) used greatest stack depth: 12344 bytes left
[    2.889011] ip (292) used greatest stack depth: 12328 bytes left
[   22.565533] ip (2137) used greatest stack depth: 12224 bytes left
[  770.920468] blackhole_netdev_xmit(): Dropping skb.
[  770.920532] blackhole_netdev_xmit(): Dropping skb.
[  770.920562] blackhole_netdev_xmit(): Dropping skb.
[  770.920589] blackhole_netdev_xmit(): Dropping skb.
[ 1092.987875] blackhole_netdev_xmit(): Dropping skb.
[ 1092.987964] blackhole_netdev_xmit(): Dropping skb.
[ 1092.988022] blackhole_netdev_xmit(): Dropping skb.
[ 1092.988076] blackhole_netdev_xmit(): Dropping skb.
[ 1190.425154] blackhole_netdev_xmit(): Dropping skb.
[ 1190.425228] blackhole_netdev_xmit(): Dropping skb.
[ 1190.425275] blackhole_netdev_xmit(): Dropping skb.
[ 1190.425325] blackhole_netdev_xmit(): Dropping skb.