--- Comment #1 from ---
A commit references this bug:

Author: kp
Date: Tue Aug  8 21:09:26 UTC 2017
New revision: 322280

  pf_get_sport(): Prevent possible endless loop when searching for an unused
nat port

  This is an import of Alexander Bluhm's OpenBSD commit r1.60,
  the first chunk had to be modified because on OpenBSD the
  'cut' declaration is located elsewhere.

  Upstream report by Jingmin Zhou:

  OpenBSD commit message:
   Use a 32 bit variable to detect integer overflow when searching for
   an unused nat port.  Prevents a possible endless loop if high port
   is 65535 or low port is 0.
   report and analysis Jingmin Zhou; OK sashan@ visa@
  Quoted from:

  PR:           221201
  Submitted by: Fabian Keil <>
  Obtained from:  OpenBSD via ElectroBSD
  MFC after:    1 week


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