Re: [tor-bugs] #15901 [Tor]: apparent memory corruption -- very difficult to isolate

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#15901: apparent memory corruption -- very difficult to isolate
---------------------------+--------------------------------
     Reporter:  starlight  |      Owner:
         Type:  defect     |     Status:  new
     Priority:  critical   |  Milestone:  Tor: 0.2.7.x-final
    Component:  Tor        |    Version:  Tor: 0.2.6.10
   Resolution:             |   Keywords:
Actual Points:             |  Parent ID:
       Points:             |
---------------------------+--------------------------------

Comment (by starlight):

 The corrupt store consists of "n rHDXjA" and does
 not appear to be a memory address or typical integer.

 However this fragment appears in another descriptor:

 {{{
 r FBIPartyTrain rHDXjAZho0VTaXtMkOjCyGF1QW0 vtGOeTZ3wDFo4Dx70WWeGMlO4gs
 2015-08-17 08:56:42 24.214.139.69 9001 25565
 s Running Stable V2Dir Valid
 v Tor 0.2.5.12
 w Bandwidth=21
 p reject 1-65535
 }}}

 The two values are exactly 13372 bytes distant from each
 other, with the source (above) appearing at the lower
 memory address.  The distance is such that one can
 imagine a pointer manipulation bug.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15901#comment:22>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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