[tor-bugs] #24992 [Core Tor/Tor]: SingleOnion (and Tor2web?) connections may need better expiry, lots left open

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri Feb 9 15:18:34 UTC 2018


#24992: SingleOnion (and Tor2web?) connections may need better expiry, lots left
open
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 Reporter:  alecmuffett             |          Owner:  (none)
     Type:  defect                  |         Status:  new
 Priority:  Medium                  |      Milestone:  Tor: 0.3.4.x-final
Component:  Core Tor/Tor            |        Version:  Tor: 0.3.2.9
 Severity:  Normal                  |     Resolution:
 Keywords:  single-onion, circuits  |  Actual Points:
Parent ID:                          |         Points:
 Reviewer:                          |        Sponsor:
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Comment (by dgoulet):

 Considering 10 intro points (maximum for v2), a service is allowed to
 launch `((10 + 2) * 2)` (see rend_max_intro_circs_per_period()) intro
 points in a 300 seconds window (5 min).

 I expect that some of the intro points failed to establish properly (maybe
 due to the ongoing load on the network?) and then you hit the mark. Some
 INFO log would confirm that or help out greatly understand what is
 happening then?

 For the ~50 TIME_WAIT ... with that amount it is due to network problems
 in some ways, most likely to the relays you are connecting to? That is the
 FIN or final ACK got lost and the connection was stucked there. I would be
 surprised that tor never close() those as at least the other side would
 have?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24992#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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