r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
setresuid(0x0, 0xee01, 0x0)
ioctl$sock_inet6_SIOCDELRT(r0, 0x890c, &(0x7f00000000c0)={@private2, @ipv4={'\x00', '\xff\xff', @empty}, @mcast1})