[    2.507708] ip (276) used greatest stack depth: 12352 bytes left
[    8.591896] ip (647) used greatest stack depth: 12344 bytes left
[  995.325856] blackhole_netdev_xmit(): Dropping skb.
[  995.325919] blackhole_netdev_xmit(): Dropping skb.
[  995.325949] blackhole_netdev_xmit(): Dropping skb.
[  995.325981] blackhole_netdev_xmit(): Dropping skb.
[ 1080.999788] blackhole_netdev_xmit(): Dropping skb.
[ 1080.999839] blackhole_netdev_xmit(): Dropping skb.
[ 1080.999869] blackhole_netdev_xmit(): Dropping skb.
[ 1080.999896] blackhole_netdev_xmit(): Dropping skb.
[ 1175.339897] blackhole_netdev_xmit(): Dropping skb.
[ 1175.339959] blackhole_netdev_xmit(): Dropping skb.
[ 1175.339995] blackhole_netdev_xmit(): Dropping skb.
[ 1175.340032] blackhole_netdev_xmit(): Dropping skb.