[    1.851278] ip (240) used greatest stack depth: 12352 bytes left
[    2.489586] ip (274) used greatest stack depth: 12320 bytes left
[    5.551248] ip (441) used greatest stack depth: 12160 bytes left
[  677.988291] blackhole_netdev_xmit(): Dropping skb.
[  677.988374] blackhole_netdev_xmit(): Dropping skb.
[  677.988408] blackhole_netdev_xmit(): Dropping skb.
[  677.988440] blackhole_netdev_xmit(): Dropping skb.
[  695.329887] blackhole_netdev_xmit(): Dropping skb.
[  695.329970] blackhole_netdev_xmit(): Dropping skb.
[  695.330022] blackhole_netdev_xmit(): Dropping skb.
[  695.330073] blackhole_netdev_xmit(): Dropping skb.
[  724.297601] blackhole_netdev_xmit(): Dropping skb.
[  724.297669] blackhole_netdev_xmit(): Dropping skb.
[  724.297718] blackhole_netdev_xmit(): Dropping skb.
[  724.297762] blackhole_netdev_xmit(): Dropping skb.
[  740.868291] blackhole_netdev_xmit(): Dropping skb.
[  740.868346] blackhole_netdev_xmit(): Dropping skb.
[  740.868384] blackhole_netdev_xmit(): Dropping skb.
[  740.868417] blackhole_netdev_xmit(): Dropping skb.
[  990.287891] blackhole_netdev_xmit(): Dropping skb.
[  990.287967] blackhole_netdev_xmit(): Dropping skb.
[  990.288001] blackhole_netdev_xmit(): Dropping skb.
[  990.288033] blackhole_netdev_xmit(): Dropping skb.
[ 1244.260344] blackhole_netdev_xmit(): Dropping skb.
[ 1244.260398] blackhole_netdev_xmit(): Dropping skb.
[ 1244.260430] blackhole_netdev_xmit(): Dropping skb.
[ 1244.260458] blackhole_netdev_xmit(): Dropping skb.