r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
ioctl$sock_inet6_SIOCDELRT(r0, 0x890c, &(0x7f0000000240)={@rand_addr=' \x01\x00', @private2, @mcast2, 0x0, 0xfffc, 0x0, 0x0, 0x0, 0x1310018})