[    2.037962] ip (243) used greatest stack depth: 12832 bytes left
[    2.076521] ip (246) used greatest stack depth: 12352 bytes left
[    2.680183] ip (277) used greatest stack depth: 12320 bytes left
[    2.878104] ip (291) used greatest stack depth: 12272 bytes left
[  862.480462] blackhole_netdev_xmit(): Dropping skb.
[  862.480523] blackhole_netdev_xmit(): Dropping skb.
[  862.480555] blackhole_netdev_xmit(): Dropping skb.
[  862.480590] blackhole_netdev_xmit(): Dropping skb.
[  958.663363] blackhole_netdev_xmit(): Dropping skb.
[  958.663433] blackhole_netdev_xmit(): Dropping skb.
[  958.663463] blackhole_netdev_xmit(): Dropping skb.
[  958.663504] blackhole_netdev_xmit(): Dropping skb.
[  965.535369] blackhole_netdev_xmit(): Dropping skb.
[  965.535425] blackhole_netdev_xmit(): Dropping skb.
[  965.535457] blackhole_netdev_xmit(): Dropping skb.
[  965.535488] blackhole_netdev_xmit(): Dropping skb.
[  972.630949] blackhole_netdev_xmit(): Dropping skb.
[  972.631021] blackhole_netdev_xmit(): Dropping skb.
[  972.631063] blackhole_netdev_xmit(): Dropping skb.
[  972.631101] blackhole_netdev_xmit(): Dropping skb.
[ 1048.789756] blackhole_netdev_xmit(): Dropping skb.
[ 1048.789811] blackhole_netdev_xmit(): Dropping skb.
[ 1048.789847] blackhole_netdev_xmit(): Dropping skb.
[ 1048.789888] blackhole_netdev_xmit(): Dropping skb.
[ 1186.078071] blackhole_netdev_xmit(): Dropping skb.
[ 1186.078117] blackhole_netdev_xmit(): Dropping skb.
[ 1186.078147] blackhole_netdev_xmit(): Dropping skb.
[ 1186.078174] blackhole_netdev_xmit(): Dropping skb.