[tor-bugs] #27080 [Core Tor/Tor]: bridges fail on Tor 0.3.4.1-alpha and later

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Aug 20 18:47:00 UTC 2018


#27080: bridges fail on Tor 0.3.4.1-alpha and later
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.4.1-alpha
 Severity:  Blocker                              |     Resolution:
 Keywords:  034-must, 035-must, regression,      |  Actual Points:
  tor-bridge 034-backport                        |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by nickm):

 I found one issue, which might or might not be a complete explanation
 here.  This is from a client in the bridges-min network:
 {{{
 Aug 20 13:35:57.787 [notice] No Tor server allows exit to 127.0.0.1:4747.
 Rejecting.
 }}}

 Looking at the cached-microdescs in the authority's directory, I saw that
 there is one with a correct policy line `p accept 1-65535` --
 corresponding to the network's exit, 002r.  But the client did not have
 that microdescriptor cached: it had an older one one.

 Digging deeper, it appears that the client is receiving new conensuses,
 but it is not re-launching microdescriptor downloads fast enough.  The
 router_have_minimum_dir_info() function is returning 1, so
 directory_info_has_arrived() is not launching any new descriptor downloads
 here.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27080#comment:12>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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