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Description of problem:
If the user configures sssd to use ad_matching_rule and there are no group members, the SSSD accesses random data and crashes. 

Version-Release number of selected component (if applicable):
sssd-1.9.2-82.10.el6_4.x86_64

How reproducible:
easy to reproduce

Steps to Reproduce:
1. Configure sssd to use ad_matching_rule and there are no group members,

Actual results:
sssd_be segfaults:
kernel: sssd_be[16228]: segfault at 0 ip 00007f8f43f4b68e sp 00007fffc48d6850 error 4 in libsss_ldap.so[7f8f43e81000+150000]

Expected results:
sssd doesn't crash

Additional info:
Upstream bug
https://fedorahosted.org/sssd/ticket/2157

Upstream ticket:
https://fedorahosted.org/sssd/ticket/2157

Fixed upstream:
    master: 7a8f19affd2a050fd2e9631a54c0e67048d3920c
    sssd-1-11: c55ba1127071f7e6a622d8655d89726128d73981
    sssd-1-9: 9fcfa6c6e0469b955459f5df7309df28e0f07cf7

*** Bug 1079585 has been marked as a duplicate of this bug. ***

Verified with sssd-1.11.6-1.el6

Output from beaker automation run:
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: [   LOG    ] :: bug_automation_002: bz 1033084 empty group cannot be resolved using ad_matching_rule
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

empty_group:*:781293067:
:: [   PASS   ] :: Running 'getent group empty_group' (Expected 0, got 0)
bug-automation-002 result: PASS

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/RHBA-2014-1375.html