Re: [tor-bugs] #3390 [Tor Relay]: Tor exit node crashed

["Tor Bug Tracker & Wiki" <torproject-admin@xxxxxxxxxxxxxx>]

#3390: Tor exit node crashed
-----------------------+----------------------------------------------------
 Reporter:  whabib     |          Owner:                    
     Type:  defect     |         Status:  new               
 Priority:  major      |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Relay  |        Version:                    
 Keywords:             |         Parent:                    
   Points:             |   Actualpoints:                    
-----------------------+----------------------------------------------------
Changes (by nickm):

  * priority:  normal => major
  * milestone:  => Tor: 0.2.2.x-final


Comment:

 It's not an instance of that, I believe.  The bug in the "hoo boy" comment
 is that nothing keeps two descriptors from having the same
 extrainfo_digest, and so there's no guarantee that a descriptor sd will
 appear in desc_by_eid_map[sd->extrainfo_digest], since some other
 descriptor might appear there.

 But this bug is different: there's an entry sd in desc_by_eid_map[x] such
 sd->extrainfo_digest != x, which implies that desc_by_eid_map is
 inconsistent.  This could happen because of three clauses:
   * Adding someting to desc_by_eid_map incorrectly
   * Changing an extrainfo_digest entry after adding it to desc_by_eid_map
   * Memory corruption.

 Investigating further...

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3390#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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