[tor-bugs] #22382 [Core Tor/Tor]: Fix fd leak-on-close from tor-fw-helper pipe

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#22382: Fix fd leak-on-close from tor-fw-helper pipe
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     Reporter:  nickm       |      Owner:
         Type:  defect      |     Status:  new
     Priority:  Very Low    |  Milestone:  Tor: unspecified
    Component:  Core        |    Version:
  Tor/Tor                   |
     Severity:  Normal      |   Keywords:  tor-client tor-fw-helper fd-leak
Actual Points:              |  Parent ID:
       Points:              |   Reviewer:
      Sponsor:              |
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 See discussion on #4296, in particular asn's comments.  It seems that we
 can sometimes leak a file descriptor on exit when we're using tor-fw-
 helper.

 Marking as very low priority since almost nobody uses that feature afaict.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22382>
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