[tor-bugs] #27985 [Core Tor/Tor]: Memory leak with Tor 0.3.4.8-1 and Linux 4.18.12.a-1-hardened

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#27985: Memory leak with Tor 0.3.4.8-1 and Linux 4.18.12.a-1-hardened
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 Reporter:  wrmsr         |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  High          |      Component:  Core Tor/Tor
  Version:  Tor: 0.3.4.8  |       Severity:  Major
 Keywords:  memory leak   |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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 Hi,

 one of my nodes running Tor 0.3.4.8-1 and Linux 4.18.12.a-1-hardened has a
 heavy memory leak, which is related to Tor, but it does not show up on top
 that it is Tor causing this. I just found out by restarting services with
 "good luck" that it's Tor causing this.

 This is what the memory leak looks like: https://imgur.com/a/h4bzyhy

 When oom_reaper killed  Tor, it printed:

 Oct 08 22:52:25 zepto.mcl.gg kernel: Out of memory: Kill process 2392
 (tor) score 27 or sacrifice child
 Oct 08 22:52:25 zepto.mcl.gg kernel: Killed process 2392 (tor) total-
 vm:1405252kB, anon-rss:888384kB, file-rss:0kB, shmem-rss:0kB
 Oct 08 22:52:25 zepto.mcl.gg kernel: oom_reaper: reaped process 2392
 (tor), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

 oom_reaper also killed a lot of processes before Tor, because even my
 Kernel seemed to be unsure where that memory usage came from. As I said,
 it does not appear as VIRT, RES or even SHR.

 Only notable changes to torrc is to listen on the docker if (SocksPort
 172.17.0.1:9050) and MaxCircuitDirtiness 120.

 I'd be very happy if somebody could help troubleshooting this, thanks.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27985>
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