[    1.825135] ip (246) used greatest stack depth: 12304 bytes left
[  323.179188] ip (7677) used greatest stack depth: 12160 bytes left
[  949.328889] blackhole_netdev_xmit(): Dropping skb.
[  949.328967] blackhole_netdev_xmit(): Dropping skb.
[  949.329004] blackhole_netdev_xmit(): Dropping skb.
[  949.329043] blackhole_netdev_xmit(): Dropping skb.
[ 1040.086663] blackhole_netdev_xmit(): Dropping skb.
[ 1040.086716] blackhole_netdev_xmit(): Dropping skb.
[ 1040.086749] blackhole_netdev_xmit(): Dropping skb.
[ 1040.086784] blackhole_netdev_xmit(): Dropping skb.
[ 1177.409445] blackhole_netdev_xmit(): Dropping skb.
[ 1177.409497] blackhole_netdev_xmit(): Dropping skb.
[ 1177.409528] blackhole_netdev_xmit(): Dropping skb.
[ 1177.409555] blackhole_netdev_xmit(): Dropping skb.
[ 1209.007503] blackhole_netdev_xmit(): Dropping skb.
[ 1209.007557] blackhole_netdev_xmit(): Dropping skb.
[ 1209.007589] blackhole_netdev_xmit(): Dropping skb.
[ 1209.007623] blackhole_netdev_xmit(): Dropping skb.