[Samba] samba 4.8.3 "apply group policy = yes" error

[Kacper Wirski]

Hello,

I've realised that there was an error on this server, wrong idmap.ldb, 
3000002 should be one of the built-in users or groups instead of machine 
own account. Unfortunately fixing idmap (I imported idmap.ldb from DC 
with correct mapping) didn't fix my original error, as it still appears 
each time samba is restarted.

Regards,

Kacper


W dniu 02.07.2018 o 10:52, Kacper Wirski via samba pisze:
> Hello,
>
> Centos 7.5 samba 4.8.3 installation, compiled from source working as 
> AD DC.
>
> It was an update from 4.7 (not an in place update, but added new DC's 
> to existing domain and demoted 4.7.x DC's).
>
> After adding to my smb.conf:
>
> /apply group policies = yes/
>
>
> I see errors on samba star:
>
> ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>   /usr/local/samba/sbin/samba_gpoupdate: SID 
> S-1-5-21-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx -> getpwuid(3000002) failed
> [2018/07/02 10:21:45.885124,  0] 
> ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>  /usr/local/samba/sbin/samba_gpoupdate: Traceback (most recent call 
> last):
> ./lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>  /usr/local/samba/sbin/samba_gpoupdate:   File 
> "/usr/local/samba/sbin/samba_gpoupdate", line 177, in <module>
>  ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>  /usr/local/samba/sbin/samba_gpoupdate:     apply_gp(lp, creds, 
> test_ldb, logger, store, gp_extensions)
> ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>   /usr/local/samba/sbin/samba_gpoupdate:   File 
> "/usr/local/samba/sbin/samba_gpoupdate", line 71, in apply_gp
>  ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>  /usr/local/samba/sbin/samba_gpoupdate:     for gpo_obj in gpos:
> [2018/07/02 10:21:45.885357,  0] 
> ../lib/util/util_runcmd.c:327(samba_runcmd_io_handler)
>  winbindd[14072]:   /usr/local/samba/sbin/samba_gpoupdate: TypeError: 
> 'NoneType' object is not iterable
>
>
> UID that is "failed" is the right machine account of the server (DC2$).
>
> Running "wbinfo --uid-info=30000002 results correctly with
>
> DOMAIN\dc2$:*:3000002:10000::/home/dc2_ at DOMAIN:/bin/bash
>
> Same issue is present on all other samba 4 AD servers  i tried it 
> (also centos 7.5 with compiled from source samba 4.8.3).
>
> Running: "samba_gpoupdate -M -d 5" is on the other hand successfull, 
> and GPO is being applied correctly:
>
> end of output looks like this:
>
> KDC Minimum Password age was changed from -4320000000000 to 
> -4320000000000
> KDC Maximum Password age was changed from -25920000000000 to 
> -25920000000000
> KDC Minimum Password length was changed from 5 to 8
> KDC Password Properties were changed from 1 to 1
> kdc:user_ticket_lifetime was changed from 10 to 13
> kdc:renewal_lifetime was changed from 150 to 168
> kdc:service_ticket_lifetime was changed from 10 to 13
>
> and those settings are correctly applied and respected.
>
> Can anyone shed some light , why the smb.conf setting fails, but 
> running update manually works just fine? Did anyone run into same issue?
>
>
> One thing that I realized post-samba installa, is that 
> "python-chardet" package (from centos repo) was required to run the 
> "samba_gpoupdate" script. Could it be, that because it was missing at 
> compile time, that's the cause of the error?
>
> Regards,
>
> Kacper
>
>