[ 1540.896489][ T4658] gre: GRE over IPv4 demultiplexor driver
[ 1540.919547][ T4658] ip_gre: GRE over IPv4 tunneling driver
[ 1541.314046][ T4667] ip (4667) used greatest stack depth: 23864 bytes left
[ 1545.197616][ T4696] ip (4696) used greatest stack depth: 23504 bytes left