[Samba] Accessing sysvol results in fatal PANIC: internal error

[Andrew Martin]

----- Original Message -----
> From: "Andrew Martin" <amartin at xes-inc.com>
> To: samba at lists.samba.org
> Sent: Friday, July 12, 2013 9:48:41 PM
> Subject: [Samba] Accessing sysvol results in fatal PANIC: internal error
> 
> Hello,
> 
> I am currently testing two Samba 4.0.6 AD DCs. I've noticed that
> permissions in the sysvol directory do not seem to be consistent.
> Some GPs are owned by root, while others are owned by DOMAIN\Domain
> Admins. Attempting to fix the permissions with "samba-tool ntacl
> sysvolreset" while samba is running results in a "PANIC: internal
> error". In fact, even trying to "ls -l" the directories inside of
> the sysvol directory causes a PANIC. The domain is then unusable
> until I restart samba. Here is a verbose log with "log level = 3":
> http://pastebin.com/F1tSZVNf
> 
> What is the correct/safe way to fix permissions on the sysvol
> directory (and why do they get changed like this) and what is a safe
> way to sync the sysvol directory between DCs (rsync causes this same
> PANIC)?
> 
> Thanks,
> 
> Andrew Martin
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It seems that this might be bug #9820:
https://bugzilla.samba.org/show_bug.cgi?id=9820
I haven't noticed it in winbind specifically, just in that samba
becomes unresponsive.

If so, the attached patch (#9043) is the current solution to this
problem? Can it be applied to 4.0.6?

Thanks,

Andrew