[    4.906658] ip (437) used greatest stack depth: 12032 bytes left
[ 1091.408725] blackhole_netdev_xmit(): Dropping skb.
[ 1091.408791] blackhole_netdev_xmit(): Dropping skb.
[ 1091.408823] blackhole_netdev_xmit(): Dropping skb.
[ 1091.408856] blackhole_netdev_xmit(): Dropping skb.
[ 1139.885788] blackhole_netdev_xmit(): Dropping skb.
[ 1139.885843] blackhole_netdev_xmit(): Dropping skb.
[ 1139.885874] blackhole_netdev_xmit(): Dropping skb.
[ 1139.885901] blackhole_netdev_xmit(): Dropping skb.
[ 1178.270794] blackhole_netdev_xmit(): Dropping skb.
[ 1178.270850] blackhole_netdev_xmit(): Dropping skb.
[ 1178.270881] blackhole_netdev_xmit(): Dropping skb.
[ 1178.270909] blackhole_netdev_xmit(): Dropping skb.