[  848.860399] ip (6370) used greatest stack depth: 12336 bytes left
[  877.039677] blackhole_netdev_xmit(): Dropping skb.
[  877.039727] blackhole_netdev_xmit(): Dropping skb.
[  877.039759] blackhole_netdev_xmit(): Dropping skb.
[  877.039785] blackhole_netdev_xmit(): Dropping skb.
[  926.151411] blackhole_netdev_xmit(): Dropping skb.
[  926.151473] blackhole_netdev_xmit(): Dropping skb.
[  926.151513] blackhole_netdev_xmit(): Dropping skb.
[  926.151564] blackhole_netdev_xmit(): Dropping skb.
[ 1154.223309] blackhole_netdev_xmit(): Dropping skb.
[ 1154.223384] blackhole_netdev_xmit(): Dropping skb.
[ 1154.223423] blackhole_netdev_xmit(): Dropping skb.
[ 1154.223459] blackhole_netdev_xmit(): Dropping skb.
[ 1240.855124] blackhole_netdev_xmit(): Dropping skb.
[ 1240.855175] blackhole_netdev_xmit(): Dropping skb.
[ 1240.855210] blackhole_netdev_xmit(): Dropping skb.
[ 1240.855246] blackhole_netdev_xmit(): Dropping skb.