[tor-bugs] #29927 [Core Tor/Tor]: Tor protocol errors causing silent dropped cells

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#29927: Tor protocol errors causing silent dropped cells
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     Reporter:  mikeperry     |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  tor-hs
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 While testing vanguards, I've got some mystery cases client side where
 circuits are getting closed with END_CIRC_REASON_TORPROTOCOL, but Tor is
 not emmitting any log lines that correspond to this. This is happening for
 circuits with purposes CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED and
 CIRCUIT_PURPOSE_C_GENERAL.

 Additionally, CIRCUIT_PURPOSE_C_INTRODUCE_ACKED circuits are getting
 closed with a END_CIRC_REASON_FINISHED after receiving an invalid cell,
 seemingly after they are done being used.

 See also https://github.com/mikeperry-tor/vanguards/issues/37

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29927>
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