Bug 5510 - INTERNAL ERROR: Signal 6 (smb_panic) Samba DC + Winbind
Summary: INTERNAL ERROR: Signal 6 (smb_panic) Samba DC + Winbind
Alias: None
Product: Samba 3.0
Classification: Unclassified
Component: winbind (show other bugs)
Version: 3.0.30
Hardware: x86 Linux
: P3 critical
Target Milestone: none
Assignee: Samba Bugzilla Account
QA Contact: Samba QA Contact
Depends on:
Reported: 2008-06-02 01:46 UTC by David Herselman
Modified: 2016-04-29 01:19 UTC (History)
0 users

See Also:

winbindd.log - Full (22.40 KB, text/plain)
2008-06-02 01:51 UTC, David Herselman
no flags Details
winbindd.log - Signal 6 (1.33 KB, text/plain)
2008-06-02 01:51 UTC, David Herselman
no flags Details
winbindd core dump (97.67 KB, application/octet-stream)
2008-06-02 01:52 UTC, David Herselman
no flags Details
winbindd.log - Signal 11 - debug level 9 (39.28 KB, text/plain)
2008-06-08 07:27 UTC, David Herselman
no flags Details

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Description David Herselman 2008-06-02 01:46:27 UTC
We have about 150 sites currently running Samba 3.0.28a. Close to all sites are Samba DCs with winbind running to provide NTLM authentication for Squid. We've applied Jeremy's patch, from bug 5489, and everything works now (including domain trust relationships which was broken in 3.0.28a).

We are however now experiencing problems with winbind dying.

Information provided as attachments
Comment 1 David Herselman 2008-06-02 01:51:22 UTC
Created attachment 3325 [details]
winbindd.log - Full
Comment 2 David Herselman 2008-06-02 01:51:47 UTC
Created attachment 3326 [details]
winbindd.log - Signal 6
Comment 3 David Herselman 2008-06-02 01:52:18 UTC
Created attachment 3327 [details]
winbindd core dump
Comment 4 David Herselman 2008-06-02 01:54:31 UTC
Just to confirm that we have upgraded about 5 sites to 3.0.30 with Jeremey's patch and we've been seeing winbind dying with signal 6 since then...
Comment 5 Volker Lendecke 2008-06-02 04:31:10 UTC
Can you upload a debug level 10 version of winbind.log full?


Comment 6 Jeremy Allison 2008-06-02 11:10:30 UTC
A few things that would help. Run with the environment variable MALLOC_CHECK_=2 (if this is under Linux). Link with electric fence :


Or beswt of all, run under valgrind if you can (this may be too slow).

Comment 7 David Herselman 2008-06-08 07:25:23 UTC
We've had to roll back most of our Samba DC sites to 3.0.28a (although inter domain trusts between Samba DCs is broken with that version).

Either the winbindd.log files are cylcing too quickly or we'll have to roll
our test system back to 3.0.30 to catch a winbindd.log file with debug level

Attached please find full winbindd.log file, with debug level 9, with a
sample signal 11...
Comment 8 David Herselman 2008-06-08 07:27:07 UTC
Created attachment 3340 [details]
winbindd.log - Signal 11 - debug level 9
Comment 9 Björn Jacke 2016-04-29 01:19:36 UTC
if you see any issue with a recent samba version, please open a new bug on that. thanks.