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Bug 877130

Summary:	LDAP provider fails to save empty groups
Product:	Red Hat Enterprise Linux 6	Reporter:	Dmitri Pal <dpal>
Component:	sssd	Assignee:	Jakub Hrozek <jhrozek>
Status:	CLOSED ERRATA	QA Contact:	Kaushik Banerjee <kbanerje>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.4	CC:	grajaiya, jgalipea, okos, pbrezina
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	sssd-1.9.2-20.el6	Doc Type:	Bug Fix
Doc Text:	No documentation needed.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-02-21 09:40:26 UTC	Type:	---
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:	881827

Description Dmitri Pal 2012-11-15 18:48:34 UTC

This bug is created as a clone of upstream ticket:
https://fedorahosted.org/sssd/ticket/1647

This is another ghost-users related regression. A logic bug in the LDAP provider causes an attempt to allocate a zero-length array for group members while processing an empty group. The allocation would return NULL and saving the empty group would fail.

Comment 1 Jakub Hrozek 2012-11-15 19:26:40 UTC

To reproduce configure a group hierarchy like this:

nonempty_gr1 -> empty_gr -> nonempty_gr2
   +                           +
   \                            \
    - User1                       - User2

Then getent group nonempty_gr1.

The logs would show an ENOMEM bug and the memberships would be wrong in sysdb as empty_gr wouldn't be saved at all.

Comment 3 Kaushik Banerjee 2013-01-08 10:27:52 UTC

Verified in version 1.9.2-65

Output of beaker automation run:
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: [   LOG    ] :: 2307bis_010 - bz 877130 - LDAP provider fails to save empty groups
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Stopping sssd: [  OK  ]
Starting sssd: [  OK  ]
[  OK  ]
:: [03:10:55] ::  Sleeping for 5 seconds
:: [   PASS   ] :: Running 'getent group mofuser7_grp2 | grep mof_user7_2 | grep mof_user7_1'
empty_grp:*:77779:mof_user7_1
:: [   PASS   ] :: Running 'getent group empty_grp | grep mof_user7_1'
mofuser7_grp1:*:77777:mof_user7_1
:: [   PASS   ] :: Running 'getent group mofuser7_grp1 | grep mof_user7_1'
uid=77777(mof_user7_1) gid=77777(mofuser7_grp1) groups=77777(mofuser7_grp1),77778(mofuser7_grp2),77779(empty_grp)
:: [   PASS   ] :: Running 'id mof_user7_1 | grep mofuser7_grp2 | grep mofuser7_grp1 | grep empty_grp'
uid=77778(mof_user7_2) gid=77778(mofuser7_grp2) groups=77778(mofuser7_grp2)
:: [   PASS   ] :: Running 'id mof_user7_2 | grep mofuser7_grp2'
:: [   PASS   ] :: File '/var/log/sssd/sssd_LDAP.log' should not contain 'Failed to save '
:: [   PASS   ] :: File '/var/log/sssd/sssd_LDAP.log' should not contain 'Error'

Comment 4 errata-xmlrpc 2013-02-21 09:40:26 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.

http://rhn.redhat.com/errata/RHSA-2013-0508.html