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Re: [tor-bugs] #4212 [Tor Hidden Services]: Circuit in CIRCUIT_PURPOSE_C_INTRODUCING with no rend_data

#4212: Circuit in CIRCUIT_PURPOSE_C_INTRODUCING with no rend_data
---------------------------------+------------------------------------------
 Reporter:  rransom              |          Owner:                    
     Type:  defect               |         Status:  new               
 Priority:  major                |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Hidden Services  |        Version:                    
 Keywords:                       |         Parent:                    
   Points:                       |   Actualpoints:                    
---------------------------------+------------------------------------------

Comment(by rransom):

 Sebastian found that `rend_client_reextend_intro_circuit` launches a new
 circuit with purpose `CIRCUIT_PURPOSE_C_INTRODUCING` with no `rend_data`
 set.  As far as I can tell, that's not the bug that caused this crash.

 Also, the circuit created in that function can never be used by the HS
 code.  `connection_ap_handshake_attach_circuit` will call
 `circuit_get_open_circ_or_launch` to obtain an intro circ for the HS, and
 will create a new intro circ with its `rend_data` field set properly.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4212#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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