[Samba] vfs_ChDir failed: Permission denied
Marco Shmerykowsky
marco at sce-engineers.com
Sun Jan 31 16:54:13 UTC 2021
On 2021-01-31 11:45 am, Rowland penny via samba wrote:
> On 31/01/2021 16:34, Marco Shmerykowsky via samba wrote:
>>
>> On 2021-01-31 11:23 am, Marco Shmerykowsky via samba wrote:
>>> On 2021-01-31 11:18 am, Rowland penny via samba wrote:
>>>> 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
>>>
>>> Ah... Learning, learning, learning
>>>
>>>>
>>>> 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' ?
>>>
>>> 'getent group owners' returns:
>>>
>>> AD-DOMAIN\owners:x:3000025:
>>
>> I think I know how I created this problem.
>>
>> about a week ago when upgrading from samba-4.9-Stretch to
>> samba-4.13-buster
>> I caught an error in the smb.conf that was in there since I set things
>> up
>>
>> The line 'idmap config AD-DOMAIN : range = 10000-999999' had a typo
>> in the word "config" I believe. For some reason, everything continued
>> to work after the correction and then fell apart after I corrected
>> the dns issues (i hope)
>>
>> How do I fix my error, if that is indeed the issue?
>>
>> Thank you.
>>
>
> Samba has a program called 'testparm', running this will test smb.conf
> and report any errors.
Yea. I've used it. Don't know how this slipped by me.
>
> I think what happened was that Samba ignored your malformed line and
> everything ended up in the default (*) domain. Now you have fixed the
> problem, your users & groups will now have different numeric ID's, I
> Do hope you don't have a lot of data on that computer.
>
Unfortunately, there is a ton of data. On the upside, I was planning
to move all this data to a new server in the next week or two.
Is there a way to fix this either on the existing server or
the new server?
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