[Samba] memory leak 4.4.5. but where and is it fixed already?

[L.P.H. van Belle]

Hai, 

 

Im seeing memory leaks, in going throug the bug list, but i think i need some help here.

Mainly what i want to know if this is fixed in 4.5.2 ( now running 4.4.5) 

 

Situation. 

Debian Jessie amd64, Samba 4.4.5-3. (debian stretch rebuild at that time ) on both DC’s. 

Both servers have the same install. 

DC1 uses rsync for syncing sysvol and automated backups with the backup_samba script.

Bind NTP etc is setup.

 

Uptime 

DC1 = 21 Days. 

DC2 = 2 Days

 

 

Im see the following. 


On DC1: 

free -m

             total       used       free     shared    buffers     cached

Mem:          2002       1923         79          1          4        100

-/+ buffers/cache:      1818        183

Swap:         1895        903        992

 

systemctl restart samba-ad-dc

 

free -m

             total       used       free     shared    buffers     cached

Mem:          2002        364       1637          1          6        112

-/+ buffers/cache:       246       1755

Swap:         1895         80       1815


A drop of about 1.5 GB ram use for DC1.

 

And on DC2: 

free -m

             total       used       free     shared    buffers     cached

Mem:          2002        732       1269         40         87        294

-/+ buffers/cache:       350       1651

Swap:         1895          0       1895

 

systemctl restart samba-ad-dc

free -m

             total       used       free     shared    buffers     cached

Mem:          2002        649       1352         40         87        293

-/+ buffers/cache:       267       1734

Swap:         1895          0       1895


A drop of about 80Mb ( but only 2 days uptime )

 

 

I did see : 

https://bugzilla.samba.org/show_bug.cgi?id=12173  ( Rsync .. memory leak around poptGetOptArg() 

But i dont know how this is samba related. 

 

https://bugzilla.samba.org/show_bug.cgi?id=11985 but i dont use CTDB. 

 

https://bugzilla.samba.org/show_bug.cgi?id=7902  Memory problems in pidl python bindings maybe ? 

 

https://bugzilla.samba.org/show_bug.cgi?id=11901 Reparenting in a destructor incorrectly terminates freeing of children leading to a memory leak. 

Maybe , looks more like it. 

 

Software used : 

ii  ldb-tools                      2:1.1.26-1~bpo8+1              amd64        LDAP-like embedded database - tools

ii  libldb1:amd64                  2:1.1.26-1~bpo8+1              amd64        LDAP-like embedded database - shared library

ii  libnss-winbind:amd64           2:4.4.5+dfsg-3~bpo8+1          amd64        Samba nameservice integration plugins

ii  libpam-winbind:amd64           2:4.4.5+dfsg-3~bpo8+1          amd64        Windows domain authentication integration plugin

ii  libsmbclient:amd64             2:4.4.5+dfsg-3~bpo8+1          amd64        shared library for communication with SMB/CIFS servers

ii  libtalloc2:amd64               2.1.7-1~bpo8+1                 amd64        hierarchical pool based memory allocator

ii  libtdb1:amd64                  1.3.9-1~bpo8+1                 amd64        Trivial Database - shared library

ii  libtevent0:amd64               0.9.28-1~bpo8+1                amd64        talloc-based event loop library - shared library

ii  libwbclient0:amd64             2:4.4.5+dfsg-3~bpo8+1          amd64        Samba winbind client library

ii  python-ldb                     2:1.1.26-1~bpo8+1              amd64        Python bindings for LDB

ii  python-samba                   2:4.4.5+dfsg-3~bpo8+1          amd64        Python bindings for Samba

ii  python-talloc                  2.1.7-1~bpo8+1                 amd64        hierarchical pool based memory allocator - Python bindings

ii  python-tdb                     1.3.9-1~bpo8+1                 amd64        Python bindings for TDB

ii  samba                          2:4.4.5+dfsg-3~bpo8+1          amd64        SMB/CIFS file, print, and login server for Unix

ii  samba-common                   2:4.4.5+dfsg-3~bpo8+1          all          common files used by both the Samba server and client

ii  samba-common-bin               2:4.4.5+dfsg-3~bpo8+1          amd64        Samba common files used by both the server and the client

ii  samba-dsdb-modules             2:4.4.5+dfsg-3~bpo8+1          amd64        Samba Directory Services Database

ii  samba-libs:amd64               2:4.4.5+dfsg-3~bpo8+1          amd64        Samba core libraries

ii  samba-vfs-modules              2:4.4.5+dfsg-3~bpo8+1          amd64        Samba Virtual FileSystem plugins

ii  smbclient                      2:4.4.5+dfsg-3~bpo8+1          amd64        command-line SMB/CIFS clients for Unix

ii  tdb-tools                      1.3.9-1~bpo8+1                 amd64        Trivial Database - bundled binaries

ii  winbind                        2:4.4.5+dfsg-3~bpo8+1          amd64        service to resolve user and group information from Windows NT servers

( if needed, found here : http://downloads.van-belle.nl/samba4/samba-4.4.5-3/  or install them through my apt repo. ) 

 

Now, before i upgrade these servers to samba 4.5.2. anyone interessted in debugging this?  

 

If so please let me know, because im not good in debugging memory leaks, 

And if so, i’ll wait a bit longer with upgrading to 4.5.2 for the DC’s. 

 

 

Best regards, 

 

Louis