[    1.988068] ip (240) used greatest stack depth: 12376 bytes left
[    2.556862] ip (274) used greatest stack depth: 12344 bytes left
[    9.959722] ip (908) used greatest stack depth: 12328 bytes left
[  915.156065] blackhole_netdev_xmit(): Dropping skb.
[  915.156135] blackhole_netdev_xmit(): Dropping skb.
[  915.156173] blackhole_netdev_xmit(): Dropping skb.
[  915.156205] blackhole_netdev_xmit(): Dropping skb.
[ 1151.035898] blackhole_netdev_xmit(): Dropping skb.
[ 1151.035961] blackhole_netdev_xmit(): Dropping skb.
[ 1151.035990] blackhole_netdev_xmit(): Dropping skb.
[ 1151.036016] blackhole_netdev_xmit(): Dropping skb.
[ 1216.657698] blackhole_netdev_xmit(): Dropping skb.
[ 1216.657751] blackhole_netdev_xmit(): Dropping skb.
[ 1216.657786] blackhole_netdev_xmit(): Dropping skb.
[ 1216.657820] blackhole_netdev_xmit(): Dropping skb.
[ 1218.690537] blackhole_netdev_xmit(): Dropping skb.
[ 1218.690597] blackhole_netdev_xmit(): Dropping skb.
[ 1218.690625] blackhole_netdev_xmit(): Dropping skb.
[ 1218.690656] blackhole_netdev_xmit(): Dropping skb.
[ 1225.059650] blackhole_netdev_xmit(): Dropping skb.
[ 1225.059714] blackhole_netdev_xmit(): Dropping skb.
[ 1225.059763] blackhole_netdev_xmit(): Dropping skb.
[ 1225.059814] blackhole_netdev_xmit(): Dropping skb.