Comment 4 for bug 1859887

Unfortunately, I'm unable to upgrade my cluster to master or latest rocky immediately. I'm currently on stable/rocky off commit #56c070c5a37f06515c9330274ae12d87e7468421.

I walked through the other commits on latest stable/rocky and I see this commit that comes closest, which I am already running:

commit 9749fd270c1f7493fe4daf8b0e8412fcf0412184
Author: LIU Yulong <email address hidden>
Date: Mon Oct 8 14:52:16 2018 +0800

    Prevent create port forwarding to port which has binding fip

    For dvr scenario, if port has a bound floating, and then create
    port forwarding to it, this port forwarding will not work, due to
    the traffic is redirected to dvr rules.

    This patch restricts such API request, if user try to create port
    forwarding to a port, check if it has bound floating IP first.
    This will be run for all type of routers, since neutron should
    not let user to waste public IP address on a port which already
    has a floating IP, it can take care all the procotol port
    numbers.

    Conflicts:
        neutron/services/portforwarding/pf_plugin.py

    Closes-Bug: #1799137
    Change-Id: I4ba4b023d79185f8d478d60ce16417d3501bf785
    (cherry picked from commit b8d2ab8543a27b03bde534ef994027d9b44556c4)

Can you point me to a specific review/commit that you think fixes this? While upgrading might involve a lot of paperwork, I am able to apply a patch to see if that fixes things.