[tor-bugs] #24806 [Core Tor/Tor]: LTS branch leaks memory continuously under stress/attack, requires back-port of 0.3.2.8-rc fixes to remain viable

Tor Bug Tracker & Wiki blackhole at torproject.org
Sun Feb 4 16:45:49 UTC 2018


#24806: LTS branch leaks memory continuously under stress/attack, requires back-
port of 0.3.2.8-rc fixes to remain viable
--------------------------+----------------------------------
 Reporter:  starlight     |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: unspecified
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+----------------------------------

Comment (by starlight):

 Finally identified the cause of excessive memory consumption:  Running
 with CellStatistics enabled.  Opened #25141.

 Figuring it out, I ended up tracing malloc once a stable operating state
 is reached (#24914 patch applied) and netting-out frees such that only
 lingering allocations were visible.  Tor's malloc/free behavior at steady-
 state is a terrible thing to see.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24806#comment:13>
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