r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
ioctl$sock_inet6_SIOCADDRT(r0, 0x890b, &(0x7f0000000140)={@private0, @loopback, @mcast1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2a})