r0 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a)
ioctl$sock_inet6_SIOCDELRT(r0, 0x890c, &(0x7f00000004c0)={@private1, @mcast1, @loopback, 0x0, 0x6, 0x0, 0x0, 0x0, 0x5000004})