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

[Mikael Hartzell]

On top of the original Samba bug report
(https://bugzilla.samba.org/show_bug.cgi?id=13372) it says this affects
*Samba 4.1 and newer* or am I interpreting it incorrectly ?

At least I am experiencing the same behavior on Ubuntu 14.04.5 Server
with Samba 4.3.11. Sad if it won't help us with our problem.

The offending code was submitted to Samba at 29th Jun 2017, you can find
the commit here: https://gitlab.com/samba-
team/samba/commit/bd9285b19741128bae501b721d9e63dd9a9bd833   If you
search for the source file name: source3/modules/vfs_default.c   on the
page.

Maybe the date when the bug appeared sheds some light which releases
really are affected.

** Bug watch added: Samba Bugzilla #13372
   https://bugzilla.samba.org/show_bug.cgi?id=13372

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https://bugs.launchpad.net/bugs/1814532

Title:
  Big samba memory leak fixed upstream

Status in samba package in Ubuntu:
  New

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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