[tor-bugs] #11565 [Tor]: Make it clear if circ_id for create cell can be zero with non zero MSB

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#11565: Make it clear if circ_id for create cell can be zero with non zero MSB
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     Reporter:  cypherpunks  |      Owner:
         Type:  defect       |     Status:  new
     Priority:  normal       |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor          |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by cypherpunks):

 Then peers have different space of available IDs (for v4 link protocol
 initiator have one less available id to choose from). Can it be used to
 leak some information? (even fact of used prior reserved id will add some
 fingerprint)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11565#comment:3>
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