[    1.789377] ip (240) used greatest stack depth: 12376 bytes left
[    2.348732] ip (274) used greatest stack depth: 12344 bytes left
[   21.468525] ip (2370) used greatest stack depth: 12296 bytes left
[  682.019277] blackhole_netdev_xmit(): Dropping skb.
[  682.019339] blackhole_netdev_xmit(): Dropping skb.
[  682.019375] blackhole_netdev_xmit(): Dropping skb.
[  682.019404] blackhole_netdev_xmit(): Dropping skb.
[  999.200600] blackhole_netdev_xmit(): Dropping skb.
[  999.200659] blackhole_netdev_xmit(): Dropping skb.
[  999.200694] blackhole_netdev_xmit(): Dropping skb.
[  999.200727] blackhole_netdev_xmit(): Dropping skb.
[ 1003.897700] blackhole_netdev_xmit(): Dropping skb.
[ 1003.897754] blackhole_netdev_xmit(): Dropping skb.
[ 1003.897795] blackhole_netdev_xmit(): Dropping skb.
[ 1003.897837] blackhole_netdev_xmit(): Dropping skb.
[ 1156.089864] blackhole_netdev_xmit(): Dropping skb.
[ 1156.089931] blackhole_netdev_xmit(): Dropping skb.
[ 1156.089968] blackhole_netdev_xmit(): Dropping skb.
[ 1156.090003] blackhole_netdev_xmit(): Dropping skb.
[ 1232.608595] blackhole_netdev_xmit(): Dropping skb.
[ 1232.608644] blackhole_netdev_xmit(): Dropping skb.
[ 1232.608676] blackhole_netdev_xmit(): Dropping skb.
[ 1232.608714] blackhole_netdev_xmit(): Dropping skb.