[tor-bugs] #5643 [Tor Client]: Always check for protocol violations before anything else when handling cells

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#5643: Always check for protocol violations before anything else when handling
cells
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 Reporter:  asn         |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  normal      |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Client  |        Version:                    
 Keywords:              |         Parent:                    
   Points:              |   Actualpoints:                    
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 In our cell handling functions we sometimes do stuff (like assertions,
 logging, etc.) before checking that the cell arrived according to the Tor
 protocol. This leads to bugs.

 This is a ticket to fix some of these bugs.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5643>
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