1726945 – negative cache does not use values from 'filter_users' config option for known domains

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1726945 - negative cache does not use values from 'filter_users' config option for known domains

Summary: negative cache does not use values from 'filter_users' config option for know...

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux 8
Classification:	Red Hat
Component:	sssd
Sub Component:
Version:	8.1
Hardware:	Unspecified
OS:	Unspecified
Priority:	unspecified
Severity:	unspecified
Target Milestone:	rc
Target Release:	8.0
Assignee:	SSSD Maintainers
QA Contact:	ipa-qe
Docs Contact:
URL:
Whiteboard:	sync-to-jira
Depends On:	1724088
Blocks:
TreeView+	depends on / blocked

Reported:	2019-07-04 07:03 UTC by Jakub Hrozek
Modified:	2020-09-23 17:34 UTC (History)
CC List:	12 users (show)
Fixed In Version:	sssd-2.2.0-6.el8
Doc Type:	If docs needed, set a value
Doc Text:
Clone Of:	1724088
Environment:
Last Closed:	2019-11-05 22:34:25 UTC
Type:	Bug
Target Upstream Version:
Embargoed:
Dependent Products:

Attachments	(Terms of Use)

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Github	SSSD sssd issues 4950	0	None	closed	UPN negative cache does not use values from 'filter_users' config option	2020-09-23 17:29:38 UTC
Red Hat Product Errata	RHSA-2019:3651	0	None	None	None	2019-11-05 22:34:44 UTC

Comment 1 Jakub Hrozek 2019-07-25 19:50:52 UTC

Steeve/Anuja, do we still want the fix in 8.1? I would say yes, but if you agree, can you ack the bug, please?

Comment 2 Kaleem 2019-08-01 14:56:25 UTC

Jakub,

Adding the ack.

Comment 4 Sergey Orlov 2019-09-06 14:45:18 UTC

Failed to verify the fix.

System information:
# cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.1 Beta (Ootpa)

# rpm -q sssd-common
sssd-common-2.2.0-19.el8.x86_64

# grep -B1  filter_user /etc/sssd/sssd.conf
[domain/testrelm.test]
filter_user = testuser

# grep -B1 debug /etc/sssd/sssd.conf 
[nss]
debug_level = 9

# ipa config-show | grep resolution
  Domain resolution order: ad.test

# ipa trust-find
---------------
1 trust matched
---------------
  Realm name: ad.test
  Domain NetBIOS name: AD
  Domain Security Identifier: S-1-5-21-622203625-2864379380-2354941926
  Trust type: Active Directory domain
  UPN suffixes: UPNsuffix.com
----------------------------
Number of entries returned 1
----------------------------

# ipa trustdomain-find ad.test
  Domain name: ad.test
  Domain NetBIOS name: AD
  Domain Security Identifier: S-1-5-21-622203625-2864379380-2354941926
  Domain enabled: True
----------------------------
Number of entries returned 1
----------------------------


Test script:
systemctl stop sssd
ipactl stop
rm -rf /var/lib/sss/{db,mc}/*
rm -f /var/log/sssd/sssd_nss.log
systemctl start sssd
ipactl start
while ! sssctl domain-list | grep ad.test; do echo -n .; sleep 1; done
grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested yet
id testuser
grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser

Script output (executed 3 times with same result):
# systemctl stop sssd
# ipactl stop
...
ipa: INFO: The ipactl command was successful
# rm -rf /var/lib/sss/{db,mc}/*
# rm -f /var/log/sssd/sssd_nss.log
# systemctl start sssd
# ipactl start
...
ipa: INFO: The ipactl command was successful
# while ! sssctl domain-list | grep ad.test; do echo -n .; sleep 1; done
..........................................ad.test
# grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested yet
User not requested yet
# id testuser
id: ‘testuser’: no such user
# grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser
(Fri Sep  6 16:35:53 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #56: Looking up [testuser] in data provider
(Fri Sep  6 16:35:53 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #56: Looking up [testuser] in data provider
(Fri Sep  6 16:35:53 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #56: Looking up [testuser] in data provider
(Fri Sep  6 16:35:53 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #56: Looking up [testuser] in data provider


I also executed modified script -- with sleep after sssd finds AD domain:
systemctl stop sssd
ipactl stop
rm -rf /var/lib/sss/{db,mc}/*
rm -f /var/log/sssd/sssd_nss.log
systemctl start sssd
ipactl start
while ! sssctl domain-list | grep ad.test; do echo -n .; sleep 1; done
sleep 10
grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested yet
id testuser
grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser

Output:
# systemctl stop sssd
# ipactl stop
...
ipa: INFO: The ipactl command was successful
# rm -rf /var/lib/sss/{db,mc}/*
# rm -f /var/log/sssd/sssd_nss.log
# systemctl start sssd
# ipactl start
...
ipa: INFO: The ipactl command was successful
# while ! sssctl domain-list | grep ad.test; do echo -n .; sleep 1; done
.........................................ad.test
# sleep 10
# grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested yet
User not requested yet
# id testuser
id: ‘testuser’: no such user
# grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser
(Fri Sep  6 16:40:32 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #54: Looking up [testuser] in data provider
(Fri Sep  6 16:40:32 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #54: Looking up [testuser] in data provider
(Fri Sep  6 16:40:32 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #54: Looking up [testuser] in data provider
(Fri Sep  6 16:40:32 2019) [sssd[nss]] [cache_req_search_dp] (0x0400): CR #54: Looking up [testuser] in data provider


So I suspect two problems here: 
1. filter_user is not working
2. sssd fails to fetch user immediately after it finds the trusted domain

Comment 5 Sumit Bose 2019-09-06 17:38:31 UTC

Hi,

can you please try again, the option is called 'filter_users' and it is an option for the [nss] section, please see man sssd.conf for details.

bye,
Sumit

Comment 6 Sergey Orlov 2019-09-09 09:26:01 UTC

Reading man page:
1. Option name is filter_users, not filter_user, my bad
2. Option can be in nss and in domain sections. Using the first option.

Also I contacted Anuja, she said that the original bug was about full-qualified UPN in filter_users.

The fix is verified now.

# cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.1 Beta (Ootpa)

# rpm -q sssd-common
sssd-common-2.2.0-19.el8.x86_64

# grep -B4  filter_user /etc/sssd/sssd.conf
[nss]
debug_level = 9
homedir_substring = /home
memcache_timeout = 600
filter_users = testuser

# ipa config-show | grep resolution
  Domain resolution order: ad.test:testrelm.test

Verification script: 
systemctl stop sssd
ipactl stop
rm -rf /var/lib/sss/{db,mc}/*
rm -f /var/log/sssd/sssd_nss.log
systemctl start sssd
ipactl start
while ! sssctl domain-list | grep ad.test; do echo -n .; sleep 1; done
grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested yet
id testuser
grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested

Output: 
# systemctl stop sssd
# ipactl stop
...
ipa: INFO: The ipactl command was successful
# rm -rf /var/lib/sss/{db,mc}/*
# rm -f /var/log/sssd/sssd_nss.log
# systemctl start sssd
# ipactl start
...
ipa: INFO: The ipactl command was successful
# while ! sssctl domain-list | grep ad.test; do echo -n .; sleep 1; done
.....................................................................ad.test
# grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested yet
User not requested yet
# id testuser
id: ‘testuser’: no such user
# grep cache_req_search_dp /var/log/sssd/sssd_nss.log  | grep testuser || echo User not requested
User not requested

Comment 8 errata-xmlrpc 2019-11-05 22:34:25 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-2019:3651

Note You need to log in before you can comment on or make changes to this bug.