[    1.812725] ip (241) used greatest stack depth: 12304 bytes left
[  626.897967] ip (14680) used greatest stack depth: 12224 bytes left
[ 1076.210815] blackhole_netdev_xmit(): Dropping skb.
[ 1076.210881] blackhole_netdev_xmit(): Dropping skb.
[ 1076.210928] blackhole_netdev_xmit(): Dropping skb.
[ 1076.210981] blackhole_netdev_xmit(): Dropping skb.
[ 1141.455713] blackhole_netdev_xmit(): Dropping skb.
[ 1141.455761] blackhole_netdev_xmit(): Dropping skb.
[ 1141.455792] blackhole_netdev_xmit(): Dropping skb.
[ 1141.455827] blackhole_netdev_xmit(): Dropping skb.
[ 1152.026503] blackhole_netdev_xmit(): Dropping skb.
[ 1152.026561] blackhole_netdev_xmit(): Dropping skb.
[ 1152.026592] blackhole_netdev_xmit(): Dropping skb.
[ 1152.026634] blackhole_netdev_xmit(): Dropping skb.
[ 1166.664696] blackhole_netdev_xmit(): Dropping skb.
[ 1166.664749] blackhole_netdev_xmit(): Dropping skb.
[ 1166.664788] blackhole_netdev_xmit(): Dropping skb.
[ 1166.664827] blackhole_netdev_xmit(): Dropping skb.