#1932 sssd_be crashing with nested ldap groups contain a dangling member
Closed: Fixed None Opened 8 years ago by jhrozek.

Ticket was cloned from Red Hat Bugzilla (product Red Hat Enterprise Linux 6): Bug 963235

Description of problem:
I have several fully patched RedHat boxes (20 or more), with the following sssd
rpms installed:

sssd-client-1.9.2-82.7.el6_4.x86_64
sssd-1.9.2-82.7.el6_4.x86_64

Whenever a lookup is done (for example opening an SSH session or running groups
username) to figure out a users' group membership and that particular user is a
member of a ldap group that is nested in another ldap group, sssd_be aborts
with the following logged to /var/log/messages:

kernel: sssd_be[32294]: segfault at 0 ip (null) sp 00007fff4a2f2eb8 error 14 in
sssd_be[400000+87000]

I do make use of the ldap_schema = rfc2307bis and ldap_group_member =
uniqueMember options, as our ldap provider is Oracle Enterprise Directory
Server (formally Sun Directory Server).

I have also confirmed that this issue was introduced with an update to sssd
released sometime after sssd-1.9.2-82.el6.x86_64, as in order to further
troubleshoot this, I did a clean build of a RedHat 6.4 client, used the same
/etc/sssd/sssd.conf file and have yet to have any trouble with the sssd daemon
crashing.

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

How reproducible:

Steps to Reproduce:
1. install update to sssd higher than sssd-1.9.2-82.el6.x86_64
2. use nested ldap groups
3. run groups username command

Actual results:
sssd crashes with the following logged to /var/log/messages:

kernel: sssd_be[32294]: segfault at 0 ip (null) sp 00007fff4a2f2eb8 error 14 in
sssd_be[400000+87000]

Expected results:

with client running sssd-1.9.2-82.7.el6_4.x86_64 or lowered (i.e. fresh RedHat
6.4 install or previous version of 6.x) sssd does not crash

Additional info:

Can slip into 1.10.x

blockedby: =>
blocking: =>
coverity: =>
design: =>
design_review: => 0
feature_milestone: =>
fedora_test_page: =>
milestone: NEEDS_TRIAGE => SSSD 1.10.0
review: True => 0
selected: =>
testsupdated: => 0

Fields changed

milestone: SSSD 1.10.0 => SSSD 1.10.1

Was there any news from the reporter? If not, please close as worksforme.

changelog: =>
owner: somebody => lslebodn

Bugzilla ticket BZ963235 was closed with reason: INSUFFICIENT_DATA

resolution: => worksforme
status: new => closed

Fields changed

resolution: worksforme =>
status: closed => reopened

I am now able to reproduce the bug with Najmuddin's help.

owner: lslebodn => jhrozek
status: reopened => new

This bug only affects the 1.9 series.

milestone: SSSD 1.10.1 => SSSD 1.9.6
status: new => assigned

resolution: => fixed
status: assigned => closed

Fields changed

changelog: => N/A, just a bugfix

Metadata Update from @jhrozek:
- Issue assigned to jhrozek
- Issue set to the milestone: SSSD 1.9.6

4 years ago

SSSD is moving from Pagure to Github. This means that new issues and pull requests
will be accepted only in SSSD's github repository.

This issue has been cloned to Github and is available here:
- https://github.com/SSSD/sssd/issues/2974

If you want to receive further updates on the issue, please navigate to the github issue
and click on subscribe button.

Thank you for understanding. We apologize for all inconvenience.

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