r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = socket$packet(0x11, 0x3, 0x300)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000140)={'sit0\x00', <r2=>0x0})
ioctl$sock_ipv6_tunnel_SIOCDELTUNNEL(r0, 0x89f2, &(0x7f0000000200)={'sit0\x00', &(0x7f0000001340)={'ip6tnl0\x00', r2, 0x0, 0x0, 0x0, 0x0, 0x0, @private0, @ipv4={'\x00', '\xff\xff', @local}}})