r0 = socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$sock_inet6_SIOCDELRT(r0, 0x890c, &(0x7f0000000080)={@local, @private2, @private1, 0x0, 0x800, 0x0, 0x0, 0x0, 0x1000000})