r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETTXFILTER(r0, 0x400454ca, &(0x7f0000000200)=ANY=[@ANYBLOB="2e0200063f50dd9050d386069bed0ac75f"])
ioctl$TUNGETIFF(r0, 0x800454d2, &(0x7f0000000240)={'ip6gre0\x00'})