[    2.331177] ip (274) used greatest stack depth: 12344 bytes left
[    4.795205] ip (439) used greatest stack depth: 12184 bytes left
[  730.551100] blackhole_netdev_xmit(): Dropping skb.
[  730.551179] blackhole_netdev_xmit(): Dropping skb.
[  730.551223] blackhole_netdev_xmit(): Dropping skb.
[  730.551269] blackhole_netdev_xmit(): Dropping skb.
[ 1128.542350] blackhole_netdev_xmit(): Dropping skb.
[ 1128.542426] blackhole_netdev_xmit(): Dropping skb.
[ 1128.542468] blackhole_netdev_xmit(): Dropping skb.
[ 1128.542510] blackhole_netdev_xmit(): Dropping skb.
[ 1212.806826] blackhole_netdev_xmit(): Dropping skb.
[ 1212.806888] blackhole_netdev_xmit(): Dropping skb.
[ 1212.806923] blackhole_netdev_xmit(): Dropping skb.
[ 1212.806954] blackhole_netdev_xmit(): Dropping skb.