[    1.817263] ip (241) used greatest stack depth: 12544 bytes left
[    2.418107] ip (276) used greatest stack depth: 12320 bytes left
[  674.218197] blackhole_netdev_xmit(): Dropping skb.
[  674.218267] blackhole_netdev_xmit(): Dropping skb.
[  674.218302] blackhole_netdev_xmit(): Dropping skb.
[  674.218336] blackhole_netdev_xmit(): Dropping skb.
[  691.083579] blackhole_netdev_xmit(): Dropping skb.
[  691.083638] blackhole_netdev_xmit(): Dropping skb.
[  691.083669] blackhole_netdev_xmit(): Dropping skb.
[  691.083710] blackhole_netdev_xmit(): Dropping skb.
[  728.088680] blackhole_netdev_xmit(): Dropping skb.
[  728.088746] blackhole_netdev_xmit(): Dropping skb.
[  728.088791] blackhole_netdev_xmit(): Dropping skb.
[  728.088832] blackhole_netdev_xmit(): Dropping skb.
[  769.814146] blackhole_netdev_xmit(): Dropping skb.
[  769.814205] blackhole_netdev_xmit(): Dropping skb.
[  769.814238] blackhole_netdev_xmit(): Dropping skb.
[  769.814273] blackhole_netdev_xmit(): Dropping skb.