[ 1332.919987][T18148] gre: GRE over IPv4 demultiplexor driver
[ 1332.937004][T18148] ip_gre: GRE over IPv4 tunneling driver
[ 1332.995693][T18147] ip (18147) used greatest stack depth: 23808 bytes left
[ 1334.865664][T18179] ip (18179) used greatest stack depth: 23512 bytes left