[Bug 1814532] Re: Big samba memory leak fixed upstream

[Andreas Hasenack]

Fixed in cosmic and later.

** Also affects: samba (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: samba (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** No longer affects: samba (Ubuntu Cosmic)

** Changed in: samba (Ubuntu)
       Status: New => Fix Released

** Changed in: samba (Ubuntu Bionic)
       Status: New => Triaged

** Changed in: samba (Ubuntu Bionic)
   Importance: Undecided => High

** Tags added: server-next

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Title:
  Big samba memory leak fixed upstream

Status in samba package in Ubuntu:
  Fix Released
Status in samba source package in Bionic:
  Triaged

Bug description:
  There is a big memory leak bug in Samba 4.1 - 4.7.6. Depending on the
  circumstances all memory of the Ubuntu server will be eaten by Samba
  sooner or later. Then Linux Oom - killer will kill Samba which will
  either restart or hang.

  On our Ubuntu Server 14.04.5 I need to restart Samba 1 - 2 times a
  week. This bug probably affects also Ubuntu 18.04 if this fix has not
  yet been backported.

  This bug has been fixed upstream in Samba 4.7.7. The fix is only two
  lines of code and the bug is caused by a single misplaced "if" when
  releasing memory.

  This upstream commit fixes the bug: https://gitlab.com/samba-
  team/samba/commit/461a1172ff819692aa0a2dc5ce7fc5379c8a529e

  This is the Samba bug report:
  https://bugzilla.samba.org/show_bug.cgi?id=13372

  And here the author apologizes for the bug :)
  https://lists.samba.org/archive/samba-technical/2018-April/126937.html

  Please backport this fix to Ubuntu 14.04 and 18.04, thanks :)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: samba 2:4.3.11+dfsg-0ubuntu0.14.04.19
  ProcVersionSignature: Ubuntu 3.13.0-164.214-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-164-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.29
  Architecture: amd64
  BothFailedConnect: Yes
  Date: Mon Feb  4 11:34:06 2019
  InstallationDate: Installed on 2014-09-25 (1592 days ago)
  InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3)
  SambaServerRegression: Yes
  SmbConfIncluded: No
  SourcePackage: samba
  UpgradeStatus: No upgrade log present (probably fresh install)
  upstart.samba-ad-dc.override: manual

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