[Bug 209259] kernel panic when using PF and NAT

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209259

            Bug ID: 209259
           Summary: kernel panic when using PF and NAT
           Product: Base System
           Version: 10.3-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: sebastien.boggia at unistra.fr
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Created attachment 169953
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=169953&action=edit
core.txt file

We recently deployed a new PF firewall for our Wi-Fi users.

There is 2 access networks for up to 8000 simultaneous Wi-Fi users.
We configured round-robin NAT on 2 /25 public address spaces.

Since the firewall installation, kernel panics occurred.
Please, find attached the generated core.txt file and the core file at this URL
: 
https://seafile.unistra.fr/f/2b12056b21/?raw=1

The problem seems to have relation with PF and NAT translation.

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