[ 1336.560518][T18281] gre: GRE over IPv4 demultiplexor driver
[ 1336.584183][T18281] ip_gre: GRE over IPv4 tunneling driver
[ 1338.521451][T18310] ip (18310) used greatest stack depth: 23424 bytes left
[ 1338.727950][T18313] ip (18313) used greatest stack depth: 23368 bytes left