Comment 0 for bug 1814532

Mikael Hartzell (mhartzel) wrote :

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 is caused by a 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