[    7.728948] ip (649) used greatest stack depth: 12208 bytes left
[  895.621545] blackhole_netdev_xmit(): Dropping skb.
[  895.621695] blackhole_netdev_xmit(): Dropping skb.
[  895.621747] blackhole_netdev_xmit(): Dropping skb.
[  895.621782] blackhole_netdev_xmit(): Dropping skb.
[  905.049242] blackhole_netdev_xmit(): Dropping skb.
[  905.049323] blackhole_netdev_xmit(): Dropping skb.
[  905.049366] blackhole_netdev_xmit(): Dropping skb.
[  905.049409] blackhole_netdev_xmit(): Dropping skb.
[  925.118578] blackhole_netdev_xmit(): Dropping skb.
[  925.118638] blackhole_netdev_xmit(): Dropping skb.
[  925.118675] blackhole_netdev_xmit(): Dropping skb.
[  925.118728] blackhole_netdev_xmit(): Dropping skb.
[  925.596327] blackhole_netdev_xmit(): Dropping skb.
[  925.596386] blackhole_netdev_xmit(): Dropping skb.
[  925.596421] blackhole_netdev_xmit(): Dropping skb.
[  925.596465] blackhole_netdev_xmit(): Dropping skb.