r0 = socket$inet6_udplite(0xa, 0x2, 0x88)
ioctl$sock_ipv6_tunnel_SIOCDELTUNNEL(r0, 0x89f2, &(0x7f0000000280)={'sit0\x00', &(0x7f0000000200)={'ip6tnl0\x00', 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @empty, @ipv4={'\x00', '\xff\xff', @empty}}})