Bug 1304992

Upstream didn't completely fix this bug and since there is no downstream customer case attached, I think it's fine to wait until 7.4

* master:
    * f2e8a7c3230fac11175c0bd17c14c66a8e9b25ad
    * 160ba891ec483c5b7d2a3fcca5bd992fc790efe0
    * 17bfd9f69251781140e4b2b55ffeb649d7a79e86
    * 1594701fbdc341069e11cff9a85e7a795e52db3d

Tested using 
sssd-1.14.0-18.el7.x86_64 
ipa-server-4.4.0-7.el7.x86_64

Observations:
Although the id command displays the overridden login name , but getent group returns the actual user name e.g test2 instead of test22.
Attaching the sssd logs for the test.

Verified using the below steps
1. Create trust with windows AD.
2. User test2 is a member of sales group in Windows AD
3. now run id command on ipa-server

[root@master sssd]# id test2
uid=558001486(test2) gid=558001486(test2) groups=558001486(test2)

[root@master sssd]# getent passwd test2
test2:*:558001486:558001486:test2:/home/pne.qe/test2:

[root@master sssd]# ipa idview-find
-----------------
1 ID View matched
-----------------
  ID View Name: Default Trust View
  Description: Default Trust View for AD users. Should not be deleted.
----------------------------
Number of entries returned 1
----------------------------

[root@master sssd]# ipa idoverrideuser-add 
ID View Name: Default Trust View
Anchor to override: test2
-------------------------------------
Added User ID override "test2"
-------------------------------------
  Anchor to override: test2

[root@master sssd]# ipa idoverrideuser-mod --login=test22 
ID View Name: Default trust view
Anchor to override: test2
-------------------------------------------
Modified an User ID override "test2"
-------------------------------------------
  Anchor to override: test2
  User login: test22

[root@master sssd]# getent passwd test2
test22:*:558001486:558001486:test2:/home/pne.qe/test2:

[root@master sssd]# getent group sales
sales:*:558001488:test2

Created attachment 1190268 [details]
sssd log

Created attachment 1190269 [details]
sssd domain log

Created attachment 1190270 [details]
sssd nsss log

Found that the getent group on master/client show different result.

Please note that 'service sssd stop ; rm -frv /var/lib/sss/{db,mc}/* ; service sssd start' was run on both master and client machines before running the command.

[root@master sssd]# getent group sales
sales:*:558001488:test2

[root@client ~]# getent group sales
sales:*:558001488:test22

Note:
After manually adding sss as lookup in nsswitch.conf file against initgroups, the correct results are shown.

===IPA Server===
[root@ipaserver sssd]# grep initgroups /etc/nsswitch.conf
initgroups: files sss

[root@ipaserver sssd]# id test2
uid=558001486(test22) gid=558001486(test22) groups=558001486(test22),558000513(domain users),558001488(sales)

[root@ipaserver sssd]# getent group sales
sales:*:558001488:test22

===IPA Client===
[root@client ~]# sss_cache -E
[root@client ~]# id test2
uid=558001486(test22) gid=558001486(test22) groups=558001486(test22),558000513(domain users),558001488(sales)
[root@client ~]# getent group sales
sales:*:558001488:test22

(In reply to Sudhir Menon from comment #15)
> Note:
> After manually adding sss as lookup in nsswitch.conf file against
> initgroups, the correct results are shown.
> 
It is not expected to changes nsswitch.conf
The line for initgroups is commented out as part of "authconfig --enablesssd --update"

ipa-client-install and realmd uses authconfig underneath.
So the nsswitch.conf should be properly configured

Lukas,
You meant to say that the fix is needed in authconfig and we shouldn't be making any changes in /etc/nsswitch.conf, right?

(In reply to Sudhir Menon from comment #17)
> Lukas,
> You meant to say that the fix is needed in authconfig and we shouldn't be
> making any changes in /etc/nsswitch.conf, right?

You can test authconfig with following steps

[root@b29b086114f1 /]# grep initgroups /etc/nsswitch.conf
initgroups: files

[root@b29b086114f1 /]# authconfig --enablesssd --update
[root@b29b086114f1 /]# 
[root@b29b086114f1 /]# grep initgroups /etc/nsswitch.conf
#initgroups: files

If result is not the same then it's bug in authconfig.
otherwise there is a bug in ipa-{server,client}-install

[root@ipaserver sssd]# grep initgroups /etc/nsswitch.conf
initgroups: files
[root@ipaserver sssd]# authconfig --enablesssd --update
[root@ipaserver sssd]# grep initgroups /etc/nsswitch.conf
initgroups: files

(In reply to Lukas Slebodnik from comment #16)
> (In reply to Sudhir Menon from comment #15)
> > Note:
> > After manually adding sss as lookup in nsswitch.conf file against
> > initgroups, the correct results are shown.
> > 
> It is not expected to changes nsswitch.conf
> The line for initgroups is commented out as part of "authconfig --enablesssd
> --update"
> 
> ipa-client-install and realmd uses authconfig underneath.
> So the nsswitch.conf should be properly configured

Please see https://bugzilla.redhat.com/show_bug.cgi?id=1366569

Since there is already #bz1366569 to address the issue related to sss entry against initgroups in nsswitch.conf file. Marking the bug Verified as per comment #15.

Verified using 
sssd-1.14.0-18.el7.x86_64
ipa-server-4.4.0-7.el7.x86_64

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://rhn.redhat.com/errata/RHEA-2016-2476.html