[    2.522860] ip (278) used greatest stack depth: 12368 bytes left
[    2.571382] ip (282) used greatest stack depth: 12352 bytes left
[  830.417158] blackhole_netdev_xmit(): Dropping skb.
[  830.417245] blackhole_netdev_xmit(): Dropping skb.
[  830.417293] blackhole_netdev_xmit(): Dropping skb.
[  830.417342] blackhole_netdev_xmit(): Dropping skb.
[  980.199484] blackhole_netdev_xmit(): Dropping skb.
[  980.199555] blackhole_netdev_xmit(): Dropping skb.
[  980.199595] blackhole_netdev_xmit(): Dropping skb.
[  980.199621] blackhole_netdev_xmit(): Dropping skb.
[ 1227.930640] blackhole_netdev_xmit(): Dropping skb.
[ 1227.930745] blackhole_netdev_xmit(): Dropping skb.
[ 1227.930787] blackhole_netdev_xmit(): Dropping skb.
[ 1227.930835] blackhole_netdev_xmit(): Dropping skb.