Desktop Editors don't lock files for editing on samba shares, can corrupt files

[IanHead]

This issue is unique.

• [X] I have used the search tool and did not find an issue describing my bug.

Operating System

Linux (DEB package)

Version information

7.4.1.36 (flatpak)

Expected Behavior

When a file is open in OnlyOffice DEs, it should be locked and prevent other users from being able to make edits. Vice versa OnlyOffice should display a 'read only' warning when opening a file that is already open by another program/user. This is the case if working in local file system.

Actual Behavior

Other users/applications can freely open, save the file and make conflicting saves while OnlyOffice DEs is open. If you save again in OnlyOffice, mounted via Samba/gvfs, your edits will override theirs. If mounted at the kernel level via linux-cifs (using cifs-utils package), OnlyOffice can actually corrupt the document and destroy it.

Reproduction Steps

Ubuntu 23.04

1. Mount a samba share with gvfs or cifs
2. Open a file in OnlyOffice, make edits to it, save it, leave it open
3. Attempt to open the same file as another user/application and make changes, then save

Additional information

See videos for two demonstrations of the issue:

Conflicting changes

https://github.com/ONLYOFFICE/DesktopEditors/assets/12196401/c8d3f1e2-df61-4818-af7c-c01700bf089c

File corruption

https://github.com/ONLYOFFICE/DesktopEditors/assets/12196401/ed60e53e-60ea-43e2-aa9d-3fd689da47d1

[Rita-Bubnova]

Hello, @IanHead, thank you for report. I can confirm - this is bug in video 1, issue #46748.

[XDmitryK]

@IanHead I cannot repeat your case with an error when saving a file in LO on my Ubuntu 22.04 and Fedora 38 OS. Do you have any other systems other than Ubuntu 23.04? Can you check there?

[IanHead]

Hi @XDmitryK, I've been able to replicate the behaviour with Ubuntu 22.04 with the exact same results. In the first example, I am mounting the drive from nautilus using the smb://. In the second example, I have the shared drive set up in fstab using cifs, like this (some details redacted):

//192.168.0.1/Company /mnt/Company cifs username=*********,domain=***,password=*********,noauto,rw,users 0 0

And then I mount it on login using the commend:

mount.cifs //192.168.0.1/Company /mnt/Company

[XDmitryK]

@IanHead Thanks for the detailed answer. Another small clarification, are you using smb between two Linux OS?

[IanHead]

Thanks @XDmitryK for the follow-up. The other machine is running Windows Server 2012

[IanHead]

Congratulations on the 8.0 release! This issue seems to be resolved with the new version. Are you able to confirm?