[tor-bugs] #7212 [Tor]: circuitmux assertion failure in 0.2.4.4-alpha

Tor Bug Tracker & Wiki blackhole at torproject.org
Tue Nov 13 19:59:07 UTC 2012


#7212: circuitmux assertion failure in 0.2.4.4-alpha
-----------------------+----------------------------------------------------
 Reporter:  nickm      |          Owner:                    
     Type:  defect     |         Status:  needs_review      
 Priority:  major      |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor        |        Version:  Tor: 0.2.4.4-alpha
 Keywords:  tor-relay  |         Parent:                    
   Points:             |   Actualpoints:                    
-----------------------+----------------------------------------------------

Comment(by andrea):

 I've got one instance of a circuit being spliced for rendezvous with the
 extra debug logging:

 Nov 13 10:35:00.000 [info] rend_mid_establish_rendezvous(): Established
 rendezvous point on circuit 60151 for cookie 0E5E85EF
 Nov 13 10:38:18.000 [info] rend_mid_rendezvous(): Got request for
 rendezvous from circuit 43276 to cookie 0E5E85EF.
 Nov 13 10:38:18.000 [info] rend_mid_rendezvous(): Completing rendezvous:
 circuit 43276 joins circuit 60151 (cookie 0E5E85EF)
 Nov 13 10:38:18.000 [debug] rend_mid_rendezvous(): Rendezvous circuit #1
 (p_circ_id 43276, n_circ_id 0) has no n_chan
 Nov 13 10:38:18.000 [debug] rend_mid_rendezvous(): Rendezvous circuit #1
 (p_circ_id 43276, n_circ_id 0) has p_chan 3462 at 0x1821b50
 Nov 13 10:38:18.000 [debug] rend_mid_rendezvous(): Rendezvous circuit #1
 is attached to its p_chan's cmux
 Nov 13 10:38:18.000 [debug] rend_mid_rendezvous(): Rendezvous circuit #2
 (p_circ_id 60151, n_circ_id 0) has no n_chan
 Nov 13 10:38:18.000 [debug] rend_mid_rendezvous(): Rendezvous circuit #2
 (p_circ_id 60151, n_circ_id 0) has p_chan 6161 at 0x1054e60
 Nov 13 10:38:18.000 [debug] rend_mid_rendezvous(): Rendezvous circuit #2
 is attached to its p_chan's cmux

 That's about what I expected to see; I haven't managed to personally
 observe the bug yet, though, with any version.  I'd be curious to learn,
 if people see it and/or the warning messages that should replace it in
 0.2.4.6, how much uptime and how much data relayed is typical between
 occurrences.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7212#comment:23>
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