[    1.801300] ip (244) used greatest stack depth: 12352 bytes left
[    2.234758] ip (275) used greatest stack depth: 12320 bytes left
[  324.059233] ip (2150) used greatest stack depth: 12272 bytes left
[ 1040.516306] blackhole_netdev_xmit(): Dropping skb.
[ 1040.516379] blackhole_netdev_xmit(): Dropping skb.
[ 1040.516418] blackhole_netdev_xmit(): Dropping skb.
[ 1040.516451] blackhole_netdev_xmit(): Dropping skb.
[ 1085.561250] blackhole_netdev_xmit(): Dropping skb.
[ 1085.561308] blackhole_netdev_xmit(): Dropping skb.
[ 1085.561338] blackhole_netdev_xmit(): Dropping skb.
[ 1085.561364] blackhole_netdev_xmit(): Dropping skb.
[ 1095.571903] blackhole_netdev_xmit(): Dropping skb.
[ 1095.571958] blackhole_netdev_xmit(): Dropping skb.
[ 1095.571996] blackhole_netdev_xmit(): Dropping skb.
[ 1095.572027] blackhole_netdev_xmit(): Dropping skb.