[    2.654618] ip (276) used greatest stack depth: 12344 bytes left
[    4.807964] ip (398) used greatest stack depth: 12328 bytes left
[  973.546530] blackhole_netdev_xmit(): Dropping skb.
[  973.546596] blackhole_netdev_xmit(): Dropping skb.
[  973.546626] blackhole_netdev_xmit(): Dropping skb.
[  973.546653] blackhole_netdev_xmit(): Dropping skb.
[  986.236246] blackhole_netdev_xmit(): Dropping skb.
[  986.236305] blackhole_netdev_xmit(): Dropping skb.
[  986.236334] blackhole_netdev_xmit(): Dropping skb.
[  986.236360] blackhole_netdev_xmit(): Dropping skb.
[ 1154.567605] blackhole_netdev_xmit(): Dropping skb.
[ 1154.567666] blackhole_netdev_xmit(): Dropping skb.
[ 1154.567708] blackhole_netdev_xmit(): Dropping skb.
[ 1154.567751] blackhole_netdev_xmit(): Dropping skb.