[Samba] vfs_ChDir failed: Permission denied

[Rowland penny]

On 31/01/2021 16:05, Marco Shmerykowsky via samba wrote:
> On 2021-01-31 10:41 am, Marco Shmerykowsky via samba wrote:
>> On 2021-01-31 10:15 am, Rowland penny via samba wrote:
>>> On 31/01/2021 14:42, Marco Shmerykowsky via samba wrote:
>>>>
>>>> I found the errors in the smbd log file on the domain member
>>>> server that contains the file shares.  I have group policies
>>>> for the desktop background and drives shares.  The policies
>>>> seem to be applied since the drive maps show up and I do
>>>> not see any errors when I run gpresult.
>>>>
>>>> The background doesn't show up because the image file is
>>>> stored in one of the drive shares.  Trying to access the
>>>> drive shares results in an error under windows that I do
>>>> not have permission to access the share.
>>>>
>>>>>
>>>>> Is there anything surrounding it (paths etc)
>>>>
>>>> The full line in the log is as follows:
>>>>
>>>>   chdir_current_service: 
>>>> vfs_ChDir(/path/to/domain-member-server/share) failed: Permission 
>>>> denied. Current token: uid=11105, gid=10513, 13 groups: 11105 10513 
>>>> 11119 11118 11120 11121 11122 11135 11138 2004 2005 2007 2002
>>>>
>>>>
>>>> Domain Member server.  It seemed to be working fine until the
>>>> DNS changes.
>>>>
>>>> permissions via getfacl:
>>>>
>>>> # file: path/to/domain-member-server/share
>>>> # owner: root
>>>> # group: domain\040admins
>>>> user::rwx
>>>> user:root:rwx
>>>> group::rwx
>>>> group:domain\040admins:rwx
>>>> group:owners:rwx
>>>> mask::rwx
>>>> other::---
>>>> default:user::rwx
>>>> default:user:root:rwx
>>>> default:group::r-x
>>>> default:group:domain\040admins:r-x
>>>> default:group:owners:rwx
>>>> default:mask::rwx
>>>> default:other::---
>>>>
>>>> Permissions via ls -la:
>>>>
>>>> drwxrwx---+  14 root domain admins  4096 Jan 25 16:12 share
>>>
>>>
>>> From the data supplied, only root and members of the groups 'Domain
>>> Admins & owners' can enter the share. You are connecting as a user
>>> with the ID 11105 and primary group Domain Users, but does the group
>>> 'owners' have one of these GID's '11119 11118 11120 11121 11122 11135
>>> 11138'
>>
>> I believe the answer is 'yes.'  Under windows, the user attempting to
>> log in is a member of the group 'owners'
>>
>> running 'wbinfo --name-to-sid user' returns:
>>
>> S-1-5-21-816939725-271653577-1537739732-1105 SID_USER (1)
>>                                         ^^^^
>>
>> running 'wbinfo --name-to-sid group' returns:
>>
>> S-1-5-21-816939725-271653577-1537739732-1118 SID_DOM_GROUP (2)
>>                                         ^^^^
>
> Correction, the gid seems to be off by 10000.
>

Yes and no 😂

What you were pointing to, was the RID and you are using the winbind rid 
backend, which means the groups GID is calculated from this formula:

ID = RID + LOW_RANGE_ID

Which becomes for you:

11105 = 1105 + 10000

Does 'getent group owners' produce '11105' as the first number in the 
output ?

If it doesn't, what is the groupname produced by 'getent group 11105' ?

Rowland