6.2.0-31 SMB1 NAS won't mount

[Alex Desh]

I can't connect to my old NAS SMB vers=1.0 using cifs via fstab, everything works in kernel 6.2.0-26 and I have to roll back.

mount.cifs(8) -22 invalid argument

[Alex Desh (tutralex)]

fstab:
#NAS
//192.168.x.xxx/sdcard /media/xxx/Z cifs rw,user,noauto,noperm,noserverino,nosuid,nodev,nofail,noatime,sec=ntlmssp,vers=1.0,iocharset=utf8,file_mode=0777,dir_mode=0777,domain=xxxx,servern=NAS,username=NAS,password=xxxxxx,x-gvfs-show,x-gvfs-name=Z,_netdev 0 0

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 2033386

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Moses O Gold (mosesogold)]

I have observed the same cifs issue upon using kernel 6.20-31. I was able to resolve the issue via a method provided in cifs-utils bug report 2031246 https://bugs.launchpad.net/ubuntu/+source/cifs-utils/+bug/2031246.

[Alex Desh (tutralex)]

And you can also buy a new device, with SMB version 3 or newer, will this also solve the problem?...
Maybe the developers will return the correct work with version 1.0?

[Moses O Gold (mosesogold)]

Hi Alex. It appears older NTLM support was dropped in Linux Kernel, so SMB version 1.0 does not work for cifs mount. SMB version 2.0 still works though.

See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76a3c92ec9e0668e4cd0e9ff1782eb68f61a179c

 cifs: remove support for NTLM and weaker authentication algorithms
 for SMB1.
 This removes the dependency to DES.

 Signed-off-by: Ronnie Sahlberg <email address hidden>
 Signed-off-by: Steve French <email address hidden>

See comment from jwunder in bug report 2031246:
"I've managed to get an updated level of code on the Buffalo NAS and with that and
'cifs credentials=XXX,vers=2.0,iocharset=utf8,dir_mode=0777,file_mode=077,sec=ntlmssp 0 in fstab am able to now access my disks."

[Alex Desh (tutralex)]

Well, it looks like starting with kernel 6.20-31 we will have to say goodbye to SMB version 1.0.