r0 = socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$sock_inet6_SIOCDELRT(r0, 0x890c, &(0x7f0000000080)={@mcast2, @remote, @remote, 0x0, 0x2b0, 0x0, 0x0, 0x0, 0x1020000})