mount -t cifs fails while smbclient succeed

mount -t cifs fails while smbclient succeed

[Alexis Fortin-Côté]

​Hi,
I have trouble mounting a windows share on my Ubuntu 18.04 workstation.
I've tried every thing I found using google search to no avail.

The following smbclient command works, so I know my Username and Password are working
smbclient -U ulaval.ca\\alfoc //132.203.235.15/Partages/FSS

But the following mount fails with errors :
sudo mount -t cifs -o cred=/home/alexis/smbcred,vers=2.0 //fssdc1.fss.ulaval.ca/Partages/FSS/ /home/alexis/win/

mount error(22): Invalid argument

I've logged the failing and successful trace with wireshark
failed : https://pastebin.com/7UTBNgs2
success : https://pastebin.com/kQ80vVmr

I'm using Kernel 4.20.11-042011-generic
I'm not sure about the server configuration, but it looks like its a windows server that support smb vers=1.0 and vers=2.0
mount.cifs version: 6.8

dmesg with debug information reads when it fails:
[ 2021.652324] Status code returned 0xc0000016 STATUS_MORE_PROCESSING_REQUIRED
[ 2021.667748] CIFS VFS: DFS capability contradicts DFS flag
[ 2021.673168] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED
[ 2021.675001] CIFS VFS: cifs_mount failed w/return code = -22

Thanks for helping,
Please respond (cc) to this address.​

Alex

    

Re: mount -t cifs fails while smbclient succeed

[Robin P. Blanchard]

Compare:

failed: lines 21-42

I think you may need to mount with a different sec option:


       sec=
           Security mode. Allowed values are:

           ·   none - attempt to connection as a null user (no name)

           ·   krb5 - Use Kerberos version 5 authentication

           ·   krb5i - Use Kerberos authentication and forcibly enable packet
               signing

           ·   ntlm - Use NTLM password hashing

           ·   ntlmi - Use NTLM password hashing and force packet signing

           ·   ntlmv2 - Use NTLMv2 password hashing

           ·   ntlmv2i - Use NTLMv2 password hashing and force packet signing

           ·   ntlmssp - Use NTLMv2 password hashing encapsulated in Raw
               NTLMSSP message

           ·   ntlmsspi - Use NTLMv2 password hashing encapsulated in Raw
               NTLMSSP message, and force packet signing

           The default in mainline kernel versions prior to v3.8 was sec=ntlm.
           In v3.8, the default was changed to sec=ntlmssp.

On Fri, Feb 22, 2019 at 9:30 AM Alexis Fortin-Côté
<alexis.fortin-cote.1@ulaval.ca> wrote:
>
>
> Hi,
> I have trouble mounting a windows share on my Ubuntu 18.04 workstation.
> I've tried every thing I found using google search to no avail.
>
> The following smbclient command works, so I know my Username and Password are working
> smbclient -U ulaval.ca\\alfoc //132.203.235.15/Partages/FSS
>
> But the following mount fails with errors :
> sudo mount -t cifs -o cred=/home/alexis/smbcred,vers=2.0 //fssdc1.fss.ulaval.ca/Partages/FSS/ /home/alexis/win/
>
> mount error(22): Invalid argument
>
> I've logged the failing and successful trace with wireshark
> failed : https://pastebin.com/7UTBNgs2
> success : https://pastebin.com/kQ80vVmr
>
> I'm using Kernel 4.20.11-042011-generic
> I'm not sure about the server configuration, but it looks like its a windows server that support smb vers=1.0 and vers=2.0
> mount.cifs version: 6.8
>
> dmesg with debug information reads when it fails:
> [ 2021.652324] Status code returned 0xc0000016 STATUS_MORE_PROCESSING_REQUIRED
> [ 2021.667748] CIFS VFS: DFS capability contradicts DFS flag
> [ 2021.673168] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED
> [ 2021.675001] CIFS VFS: cifs_mount failed w/return code = -22
>
> Thanks for helping,
> Please respond (cc) to this address.
>
> Alex
>
>

RE: mount -t cifs fails while smbclient succeed

[Alexis Fortin-Côté]

Hi,
Thanks for your help.
But it doesn't seem to be an authentication failure. I tried all sec option. Some clearly failed early (in the wireshark trace) due to authentification problem. Its seems to be able to authenticate with ntlmv2.
But fails latter in the exchange.

https://pastebin.com/zkRHtTvq

Frame 25 Create Response, Error: STATUS_PATH_NOT_COVERED

Any idea?

Thanks again.

Alex

________________________________________
De : Robin P. Blanchard <robin.blanchard@gmail.com>
Envoyé : 22 février 2019 14:13
À : Alexis Fortin-Côté
Cc : linux-cifs@vger.kernel.org
Objet : Re: mount -t cifs fails while smbclient succeed

Compare:

failed: lines 21-42

I think you may need to mount with a different sec option:


       sec=
           Security mode. Allowed values are:

           ·   none - attempt to connection as a null user (no name)

           ·   krb5 - Use Kerberos version 5 authentication

           ·   krb5i - Use Kerberos authentication and forcibly enable packet
               signing

           ·   ntlm - Use NTLM password hashing

           ·   ntlmi - Use NTLM password hashing and force packet signing

           ·   ntlmv2 - Use NTLMv2 password hashing

           ·   ntlmv2i - Use NTLMv2 password hashing and force packet signing

           ·   ntlmssp - Use NTLMv2 password hashing encapsulated in Raw
               NTLMSSP message

           ·   ntlmsspi - Use NTLMv2 password hashing encapsulated in Raw
               NTLMSSP message, and force packet signing

           The default in mainline kernel versions prior to v3.8 was sec=ntlm.
           In v3.8, the default was changed to sec=ntlmssp.

On Fri, Feb 22, 2019 at 9:30 AM Alexis Fortin-Côté
<alexis.fortin-cote.1@ulaval.ca> wrote:
>
>
> Hi,
> I have trouble mounting a windows share on my Ubuntu 18.04 workstation.
> I've tried every thing I found using google search to no avail.
>
> The following smbclient command works, so I know my Username and Password are working
> smbclient -U ulaval.ca\\alfoc //132.203.235.15/Partages/FSS
>
> But the following mount fails with errors :
> sudo mount -t cifs -o cred=/home/alexis/smbcred,vers=2.0 //fssdc1.fss.ulaval.ca/Partages/FSS/ /home/alexis/win/
>
> mount error(22): Invalid argument
>
> I've logged the failing and successful trace with wireshark
> failed : https://pastebin.com/7UTBNgs2
> success : https://pastebin.com/kQ80vVmr
>
> I'm using Kernel 4.20.11-042011-generic
> I'm not sure about the server configuration, but it looks like its a windows server that support smb vers=1.0 and vers=2.0
> mount.cifs version: 6.8
>
> dmesg with debug information reads when it fails:
> [ 2021.652324] Status code returned 0xc0000016 STATUS_MORE_PROCESSING_REQUIRED
> [ 2021.667748] CIFS VFS: DFS capability contradicts DFS flag
> [ 2021.673168] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED
> [ 2021.675001] CIFS VFS: cifs_mount failed w/return code = -22
>
> Thanks for helping,
> Please respond (cc) to this address.
>
> Alex
>
>

Re: mount -t cifs fails while smbclient succeed

[Steve French]

STATUS_PATH_NOT_COVERED is 'normal' indicating that there is a DFS
referral to a different target server share - so the server you are
mounting is redirecting you to another one.

Also note that the error that is logged "CIFS VFS: DFS capability
contradicts DFS flag" indicates that the server reported a different
value for share flags and capabilities (which is probably a server
bug).

Since this is Ubuntu 18.04 it is very easy to try with recent kernels
too and the 5.0 kernel had a huge improvement in DFS caching and
failover and is worth trying as an experiment.

Why don't you check and see if
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0/ works around
(what may be) a server bug with the illegal flags?  That kernel
includes the good work by Paulo to improve DFS caching and failover.

On Wed, Feb 27, 2019 at 8:38 AM Alexis Fortin-Côté
<alexis.fortin-cote.1@ulaval.ca> wrote:
>
> Hi,
> Thanks for your help.
> But it doesn't seem to be an authentication failure. I tried all sec option. Some clearly failed early (in the wireshark trace) due to authentification problem. Its seems to be able to authenticate with ntlmv2.
> But fails latter in the exchange.
>
> https://pastebin.com/zkRHtTvq
>
> Frame 25 Create Response, Error: STATUS_PATH_NOT_COVERED
>
> Any idea?
>
> Thanks again.
>
> Alex
>
> ________________________________________
> De : Robin P. Blanchard <robin.blanchard@gmail.com>
> Envoyé : 22 février 2019 14:13
> À : Alexis Fortin-Côté
> Cc : linux-cifs@vger.kernel.org
> Objet : Re: mount -t cifs fails while smbclient succeed
>
> Compare:
>
> failed: lines 21-42
>
> I think you may need to mount with a different sec option:
>
>
>        sec=
>            Security mode. Allowed values are:
>
>            ·   none - attempt to connection as a null user (no name)
>
>            ·   krb5 - Use Kerberos version 5 authentication
>
>            ·   krb5i - Use Kerberos authentication and forcibly enable packet
>                signing
>
>            ·   ntlm - Use NTLM password hashing
>
>            ·   ntlmi - Use NTLM password hashing and force packet signing
>
>            ·   ntlmv2 - Use NTLMv2 password hashing
>
>            ·   ntlmv2i - Use NTLMv2 password hashing and force packet signing
>
>            ·   ntlmssp - Use NTLMv2 password hashing encapsulated in Raw
>                NTLMSSP message
>
>            ·   ntlmsspi - Use NTLMv2 password hashing encapsulated in Raw
>                NTLMSSP message, and force packet signing
>
>            The default in mainline kernel versions prior to v3.8 was sec=ntlm.
>            In v3.8, the default was changed to sec=ntlmssp.
>
> On Fri, Feb 22, 2019 at 9:30 AM Alexis Fortin-Côté
> <alexis.fortin-cote.1@ulaval.ca> wrote:
> >
> >
> > Hi,
> > I have trouble mounting a windows share on my Ubuntu 18.04 workstation.
> > I've tried every thing I found using google search to no avail.
> >
> > The following smbclient command works, so I know my Username and Password are working
> > smbclient -U ulaval.ca\\alfoc //132.203.235.15/Partages/FSS
> >
> > But the following mount fails with errors :
> > sudo mount -t cifs -o cred=/home/alexis/smbcred,vers=2.0 //fssdc1.fss.ulaval.ca/Partages/FSS/ /home/alexis/win/
> >
> > mount error(22): Invalid argument
> >
> > I've logged the failing and successful trace with wireshark
> > failed : https://pastebin.com/7UTBNgs2
> > success : https://pastebin.com/kQ80vVmr
> >
> > I'm using Kernel 4.20.11-042011-generic
> > I'm not sure about the server configuration, but it looks like its a windows server that support smb vers=1.0 and vers=2.0
> > mount.cifs version: 6.8
> >
> > dmesg with debug information reads when it fails:
> > [ 2021.652324] Status code returned 0xc0000016 STATUS_MORE_PROCESSING_REQUIRED
> > [ 2021.667748] CIFS VFS: DFS capability contradicts DFS flag
> > [ 2021.673168] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED
> > [ 2021.675001] CIFS VFS: cifs_mount failed w/return code = -22
> >
> > Thanks for helping,
> > Please respond (cc) to this address.
> >
> > Alex
> >
> >



-- 
Thanks,

Steve