[    1.872382] ip (241) used greatest stack depth: 12352 bytes left
[    2.504778] ip (275) used greatest stack depth: 12320 bytes left
[    2.553735] ip (279) used greatest stack depth: 12160 bytes left
[    9.302371] ip (795) used greatest stack depth: 12048 bytes left
[  919.267289] blackhole_netdev_xmit(): Dropping skb.
[  919.267368] blackhole_netdev_xmit(): Dropping skb.
[  919.267407] blackhole_netdev_xmit(): Dropping skb.
[  919.267443] blackhole_netdev_xmit(): Dropping skb.
[ 1109.773258] blackhole_netdev_xmit(): Dropping skb.
[ 1109.773318] blackhole_netdev_xmit(): Dropping skb.
[ 1109.773349] blackhole_netdev_xmit(): Dropping skb.
[ 1109.773381] blackhole_netdev_xmit(): Dropping skb.
[ 1128.569245] blackhole_netdev_xmit(): Dropping skb.
[ 1128.569295] blackhole_netdev_xmit(): Dropping skb.
[ 1128.569327] blackhole_netdev_xmit(): Dropping skb.
[ 1128.569369] blackhole_netdev_xmit(): Dropping skb.
[ 1134.086255] blackhole_netdev_xmit(): Dropping skb.
[ 1134.086307] blackhole_netdev_xmit(): Dropping skb.
[ 1134.086337] blackhole_netdev_xmit(): Dropping skb.
[ 1134.086363] blackhole_netdev_xmit(): Dropping skb.
[ 1148.549059] blackhole_netdev_xmit(): Dropping skb.
[ 1148.549107] blackhole_netdev_xmit(): Dropping skb.
[ 1148.549138] blackhole_netdev_xmit(): Dropping skb.
[ 1148.549164] blackhole_netdev_xmit(): Dropping skb.