Bug 1431000

Summary:	Winbind core dumps when attempting to login as a disabled user in AD
Product:	Red Hat Enterprise Linux 6	Reporter:	Venkata Tadimarri <ktadimar>
Component:	samba	Assignee:	Andreas Schneider <asn>
Status:	CLOSED ERRATA	QA Contact:	qe-baseos-daemons
Severity:	medium	Docs Contact:	Lucie Vařáková <lmanasko>
Priority:	medium
Version:	6.8	CC:	amitkuma, asn, ekeck, fhanzelk, fjayalat, gdeschner, jarrpa, ktadimar, lmanasko, rhack
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	samba-3.6.23-44.el6	Doc Type:	Bug Fix
Doc Text:	Users disabled in AD now can connect to Windbinb Previously, the Winbind service failed to authenticate users, which were disabled in the Active Directory (AD), using the `netlogon` service. As a consequence, Winbind terminated unexpectedly. With this update, Winbind falls back to authenticate using netlogon if it is a primary trust. As a result, Windind now works as expected.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-06-19 05:08:55 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1504542

Description Venkata Tadimarri 2017-03-10 06:21:07 UTC

Created attachment 1261800 [details]
sosreport of the server

Description of problem:

Winbind generates core dump when attempting to login (ssh) as a user which is disabled in AD. This issue is observed in RHEL 5 and 6 but not in 7. 


Version-Release number of selected component (if applicable):

samba-winbind-3.6.23-36.el6_8.x86_64

How reproducible:


Steps to Reproduce:
1. Disable user in AD
2. Login with the user
3. Core dump is generated

Comment 4 Andreas Schneider 2017-03-21 10:53:28 UTC

We need debug logs showing the crash with debuginfo packages installed. The stacktrace just gives a hint but we need more information or a full backtrace from the coredump.

Comment 14 Venkata Tadimarri 2017-04-19 23:08:10 UTC

Hello Andreas,

Please find the requested information.

functional level is 2008r2.
The users are on the nbnme domain which has a trust with the nbndc domain.
The servers are connected to the nbndc domain and there is a trust between the domains.

Comment 15 Andreas Schneider 2017-04-20 14:36:34 UTC

I will try to reproduce it tomorrow.

Comment 47 errata-xmlrpc 2018-06-19 05:08:55 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:1860