[tor-bugs] #23512 [Core Tor/Tor]: Bandwidth stats watermark can be induced using OOM killer

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Aug 6 19:26:02 UTC 2018


#23512: Bandwidth stats watermark can be induced using OOM killer
-------------------------------------------------+-------------------------
 Reporter:  asn                                  |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-bug-bounty, congestion-attack,   |  Actual Points:
  research, watermark, tor-stats, guard-         |
  discovery-stats, 034-triage-20180328,          |
  034-removed-20180328                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorQ
-------------------------------------------------+-------------------------

Comment (by mikeperry):

 So, for reference, the final version of the paper, at
 https://petsymposium.org/2018/files/papers/issue2/popets-2018-0011.pdf,
 says this on page 7, Section 4.3.1:
 {{{
 This buffering fills the memory until circuit_handle_oom () is called to
 kill the circuits and recover the memory from its queues. In the mean-
 time, the cell payload is counted in the read statistics and ignored in
 the write statistics.
 }}}

 This makes it sound like asn's proposed fix in the description should
 actually be correct, and that arma's comment may have been based on an
 earlier paper revision.

 Sure would be nice to get that github url back to actually reproduce some
 science here..

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23512#comment:13>
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