[Bug 182401] [pf] pf state for some IPs reaches 4294967295 suspicously

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=182401

--- Comment #7 from johans <johan at 300.nl> ---
Created attachment 149638
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149638&action=edit
patch-races-pf-state-tracking.patch

glebius@ was kind enough to send us his work in progress on this bug.

We created a patch (attached) for ourselves which combines the use of
counter(9) with the work done by glebius at . Now that these states are protected
by the PF_STATE_LOCK the counter(9) changes are probably no longer needed, but
leaving them in place definitely won't make things worse.

For those looking to quickly fix this issue, we are running 10.1-RELEASE with
this patch now and can confirm we are no longer seeing the problems at hand.

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