[tor-bugs] #21242 [Core Tor/Tor]: Start-up error

[Tor Bug Tracker & Wiki]

#21242: Start-up error
--------------------------+------------------------------------
 Reporter:  Felixix       |          Owner:  asn
     Type:  defect        |         Status:  assigned
 Priority:  Medium        |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor  |        Version:  Tor: 0.3.0.1-alpha
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+------------------------------------

Comment (by nickm):

 Hmmm.  That does seem like a sensible analysis.  I'll work through the


 If we are using a guard in that branch, it came from
 `choose_good_entry_server()`, which got it from `guards_choose_guard()` (I
 assume. Unless this isn't using a guard, in which case it called
 `router_choose_random_node()`.)

 Now, `guards_choose_guard()` calls `entry_guard_pick_for_circuit()`, which
 *should* yield a yields a negative result (and leave its `node_t **`
 argument un-set) whenever node_get_by_id() fails.  So we know that
 node_get_by_id() returned a node_t for this node.  So either we have a
 descriptor for it, or we have a routerstatus entry for it. Let's assume we
 have a routerstatus entry but no descriptor.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21242#comment:9>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online