[ 1338.526967][T18184] gre: GRE over IPv4 demultiplexor driver
[ 1338.546916][T18184] ip_gre: GRE over IPv4 tunneling driver
[ 1338.751334][T18191] ip (18191) used greatest stack depth: 23360 bytes left
[ 1340.413255][T18215] ip (18215) used greatest stack depth: 23312 bytes left