[Bug 1655153] Re: long-running stunnel leaks memory

[Scott Emmons]

Fix confirmed to solve the SSL session leak for me - under constant
load, the RSS for stunnel would continue to grow - seeing an RSS of
500000+ was common after a few hours. Now, after running overnight the
RSS is still at 13348 and I was able to remove a cron job to restart
stunnel.

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Title:
  long-running stunnel leaks memory

Status in stunnel4 package in Ubuntu:
  Confirmed
Status in stunnel4 package in Debian:
  Unknown

Bug description:
  We are running a long-running stunnel4 daemon to proxy TLS connections
  to another set of servers. After leaving it running for a few weeks,
  its memory usage had grown to 1.5GB. Restarting it reduced its memory
  usage to expected levels (VSZ and RSS) but while I've been watching it
  today it has grown by more than 10MB.

  The stunnel website indicates that there have been fixes relating to
  memory leaks in versions 5.32 and 5.33, but Ubuntu LTS is still
  running 5.30.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: stunnel4 3:5.30-1
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic i686
  ApportVersion: 2.20.1-0ubuntu2.4
  Architecture: i386
  Date: Mon Jan  9 16:03:37 2017
  InstallationDate: Installed on 2015-10-31 (435 days ago)
  InstallationMedia: Ubuntu-Server 15.10 "Wily Werewolf" - Release i386 (20151021)
  ProcEnviron:
   TERM=xterm
   SHELL=/bin/bash
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   XDG_RUNTIME_DIR=<set>
  SourcePackage: stunnel4
  UpgradeStatus: Upgraded to xenial on 2016-05-18 (236 days ago)
  mtime.conffile..etc.default.stunnel4: 2016-10-26T22:22:28.166247

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