[tor-bugs] #8593 [Tor]: Circuit build timeout not respected?

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#8593: Circuit build timeout not respected?
------------------------+---------------------------------------------------
 Reporter:  karsten     |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  normal      |      Milestone:                    
Component:  Tor         |        Version:  Tor: 0.2.4.9-alpha
 Keywords:  tor-client  |         Parent:                    
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------
 I'm currently testing my Torperf rewrite.  I noticed that a few circuit
 builds take far longer than the circuit-build timeout.  Still, these
 circuit builds are not aborted and the resulting circuits get streams
 attached.  Isn't the CBT stuff supposed to prevent just that?

 Below is an example (reformatted).  Notice the timestamps of the CIRC
 LAUNCHED and the CIRC EXTENDED event:

 {{{
 2013-03-26 12:57:05+0000 CIRC 176 LAUNCHED
   BUILD_FLAGS=NEED_CAPACITY PURPOSE=GENERAL
   TIME_CREATED=2013-03-26T12:57:05.992579
 2013-03-26 12:58:44+0000 CIRC 176 EXTENDED
   $8BBE900C29D4B5D3FC727DB65140EA0A5EC94C19=kennkeintor
   BUILD_FLAGS=NEED_CAPACITY PURPOSE=GENERAL
   TIME_CREATED=2013-03-26T12:57:05.992579
 2013-03-26 12:58:44+0000 CIRC 176 EXTENDED
   $8BBE900C29D4B5D3FC727DB65140EA0A5EC94C19=kennkeintor,
   $0AC01745501396F338291248032E77317079A02D=KandHResearchCo
   BUILD_FLAGS=NEED_CAPACITY PURPOSE=GENERAL
   TIME_CREATED=2013-03-26T12:57:05.992579
 2013-03-26 12:58:45+0000 CIRC 176 EXTENDED
   $8BBE900C29D4B5D3FC727DB65140EA0A5EC94C19=kennkeintor,
   $0AC01745501396F338291248032E77317079A02D=KandHResearchCo,
   $3E5693C4B0FCD8B42153869494421164E42A9FE0=chaoscomputerclub29
   BUILD_FLAGS=NEED_CAPACITY PURPOSE=GENERAL
   TIME_CREATED=2013-03-26T12:57:05.992579
 2013-03-26 12:58:45+0000 CIRC 176 BUILT
   $8BBE900C29D4B5D3FC727DB65140EA0A5EC94C19=kennkeintor,
   $0AC01745501396F338291248032E77317079A02D=KandHResearchCo,
   $3E5693C4B0FCD8B42153869494421164E42A9FE0=chaoscomputerclub29
   BUILD_FLAGS=NEED_CAPACITY PURPOSE=GENERAL
   TIME_CREATED=2013-03-26T12:57:05.992579
 2013-03-26 13:01:01+0000 STREAM 379 SENTCONNECT 176
   54.242.189.124:80
 2013-03-26 13:01:02+0000 STREAM 379 REMAP 176 54.242.189.124:80
   SOURCE=EXIT
 2013-03-26 13:01:02+0000 STREAM 379 SUCCEEDED 176 54.242.189.124:80
 2013-03-26 13:01:04+0000 STREAM 379 CLOSED 176 54.242.189.124:80
   REASON=END REMOTE_REASON=DONE
 2013-03-26 13:02:09+0000 CIRC 176 CLOSED
   $8BBE900C29D4B5D3FC727DB65140EA0A5EC94C19=kennkeintor,
   $0AC01745501396F338291248032E77317079A02D=KandHResearchCo,
   $3E5693C4B0FCD8B42153869494421164E42A9FE0=chaoscomputerclub29
   BUILD_FLAGS=NEED_CAPACITY PURPOSE=GENERAL
   TIME_CREATED=2013-03-26T12:57:05.992579 REASON=FINISHED
 }}}

 The CBT was around 3 seconds at that time as reported in a
 BUILDTIMEOUT_SET event.  This is Tor version 0.2.4.9-alpha-dev (git-
 123daffb600cb1b5).  I can easily modify and re-run this tool to gather
 more data if required.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8593>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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