[    2.485366] ip (274) used greatest stack depth: 12344 bytes left
[  687.621187] blackhole_netdev_xmit(): Dropping skb.
[  687.621268] blackhole_netdev_xmit(): Dropping skb.
[  687.621308] blackhole_netdev_xmit(): Dropping skb.
[  687.621353] blackhole_netdev_xmit(): Dropping skb.
[  731.500258] blackhole_netdev_xmit(): Dropping skb.
[  731.500329] blackhole_netdev_xmit(): Dropping skb.
[  731.500384] blackhole_netdev_xmit(): Dropping skb.
[  731.500444] blackhole_netdev_xmit(): Dropping skb.
[  846.080361] blackhole_netdev_xmit(): Dropping skb.
[  846.080431] blackhole_netdev_xmit(): Dropping skb.
[  846.080475] blackhole_netdev_xmit(): Dropping skb.
[  846.080518] blackhole_netdev_xmit(): Dropping skb.
[  932.198675] blackhole_netdev_xmit(): Dropping skb.
[  932.198746] blackhole_netdev_xmit(): Dropping skb.
[  932.198793] blackhole_netdev_xmit(): Dropping skb.
[  932.198852] blackhole_netdev_xmit(): Dropping skb.