[    2.747377] ip (276) used greatest stack depth: 12320 bytes left
[  702.752010] blackhole_netdev_xmit(): Dropping skb.
[  702.752070] blackhole_netdev_xmit(): Dropping skb.
[  702.752102] blackhole_netdev_xmit(): Dropping skb.
[  702.752135] blackhole_netdev_xmit(): Dropping skb.
[  744.735676] blackhole_netdev_xmit(): Dropping skb.
[  744.735725] blackhole_netdev_xmit(): Dropping skb.
[  744.735756] blackhole_netdev_xmit(): Dropping skb.
[  744.735783] blackhole_netdev_xmit(): Dropping skb.
[  776.005217] blackhole_netdev_xmit(): Dropping skb.
[  776.005285] blackhole_netdev_xmit(): Dropping skb.
[  776.005324] blackhole_netdev_xmit(): Dropping skb.
[  776.005364] blackhole_netdev_xmit(): Dropping skb.