[Samba] Weird folders / files after upgrading to Samba 4.20

[Michael Tokarev]

17.07.2024 10:54, Matthias Kühne | Ellerhold Aktiengesellschaft via samba wrote:
> Hello lovely samba-people,

Hi! :)

> after upgrading to 4.20 some file shares randomly get weird directories
> and files in them:
> 
> drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:14 ''$'\352'
> drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:14 ''$'\324'
> drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 18 01:12 ''$'\001\002'

This looks like a listing from linux side, - is this a local linux filesystem view?

> As you can see samba creates folders with random (binary?!) names. Sometime parts of correct paths are used (see dir "_images" instead of the correct dir "my_images").
> 
> Downgrading the fileserver back to 4.19 fixes this issue.

What do you mean "fixes" ?  Are the "wrong" files disappear when
downgrading?

Do you know when these files gets created?

> As far as Im aware, these directories can be safely deleted because there may be files in them, nothing is lost. In this instance every expected file is in "images", "my-data" and "domain.de". The files in the extra dirs are nonsense.
> 
> At first we thought its a problem with Windows clients, because shares that were access regularly by windows machines had the most problems, but the share above is ONLY used by another debian machine - mounted via cifs-utils! So only samba + cifs-utils may be the culprit here.
> 
> We use Debian 12 Bookworm with samba 2:4.20.2+dfsg-5~mjt-deb12 on the server and client side. For cifs-utils the version 2:7.0-2 is used (client side).
> 
> Does anybody have any clue whats happening here?

Not yet, I for one has never seen anything like this before.

Thanks,

/mjt

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