[    2.729203] ip (280) used greatest stack depth: 12360 bytes left
[    2.979478] ip (294) used greatest stack depth: 12344 bytes left
[  677.721606] blackhole_netdev_xmit(): Dropping skb.
[  677.721664] blackhole_netdev_xmit(): Dropping skb.
[  677.721700] blackhole_netdev_xmit(): Dropping skb.
[  677.721735] blackhole_netdev_xmit(): Dropping skb.
[  822.281825] blackhole_netdev_xmit(): Dropping skb.
[  822.281892] blackhole_netdev_xmit(): Dropping skb.
[  822.281932] blackhole_netdev_xmit(): Dropping skb.
[  822.281970] blackhole_netdev_xmit(): Dropping skb.
[  993.143623] blackhole_netdev_xmit(): Dropping skb.
[  993.143701] blackhole_netdev_xmit(): Dropping skb.
[  993.143734] blackhole_netdev_xmit(): Dropping skb.
[  993.143768] blackhole_netdev_xmit(): Dropping skb.