[    2.372791] ip (276) used greatest stack depth: 12344 bytes left
[  674.410465] blackhole_netdev_xmit(): Dropping skb.
[  674.410532] blackhole_netdev_xmit(): Dropping skb.
[  674.410565] blackhole_netdev_xmit(): Dropping skb.
[  674.410596] blackhole_netdev_xmit(): Dropping skb.
[  702.839634] blackhole_netdev_xmit(): Dropping skb.
[  702.839688] blackhole_netdev_xmit(): Dropping skb.
[  702.839717] blackhole_netdev_xmit(): Dropping skb.
[  702.839747] blackhole_netdev_xmit(): Dropping skb.
[  997.492769] blackhole_netdev_xmit(): Dropping skb.
[  997.492835] blackhole_netdev_xmit(): Dropping skb.
[  997.492869] blackhole_netdev_xmit(): Dropping skb.
[  997.492903] blackhole_netdev_xmit(): Dropping skb.