[ 1380.738195][ T3970] gre: GRE over IPv4 demultiplexor driver
[ 1380.774530][ T3970] ip_gre: GRE over IPv4 tunneling driver
[ 1381.122567][ T3974] ip (3974) used greatest stack depth: 23456 bytes left
[ 1383.739511][ T3998] ip (3998) used greatest stack depth: 23424 bytes left