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Matthias Kühne | Ellerhold Aktiengesellschaft

2024-Jul-17 07:54 UTC

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

Hello lovely samba-people,

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
''$'\001\002'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:14
''$'\252\003\246\001'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:14
''$'\261\003''@'$'\005'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 20 01:10
''$'\201\t\244\001'
drwxrwx---+    4 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
''$'\020'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 28 01:13
''$'\025\002'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 11 01:11
''$'\032'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:14
'<'$'\t\244\001'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
'<+'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 21 01:10
'>'$'\276'']'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 21 01:10
'\'$'\303'']'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00  0
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
'0F0'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
''$'\340''~4'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 19 01:12
''$'\300\354''6I'$'\222\177'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
''$'\320\340''6'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
''$'\340\235''7'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00  8
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
'8W=f'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
''$'\005''Bbf'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
'?[f'
-rwxrwx---+    1 AD-ELLERHOLD\user AD-ELLERHOLD\group 6.1K Apr  3  2019 
.DS_Store
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
''$'\005\356\360''e'
drwxrwx---+    4 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jul  2 13:19 
domain.de
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
''$'\030\276\031''f'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
'='$'\264'':f'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
'_'$'\005\006''f'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:02
''$'\020''h6'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00  _images
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 30 01:14
'j'$'\307''Vf'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 25 01:00 
ld-webshop
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:13
'p'$'\t\244\001'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01  P
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 29 01:13
'P'$'\t\244\001'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
'P'$'\250''3'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
'p'$'\227''<'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
'p'$'\243''='$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
'p'$'\354''>'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 21 01:10
'Q'$'\016\310''e'
drwxrwx---+ 9985 AD-ELLERHOLD\user AD-ELLERHOLD\group 9.7M Jul 16 01:15 
my_images
drwxrwx---+    8 local-user              AD-ELLERHOLD\group 4.0K Jul  2 13:11 
my-data
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
''$'\240\331''&'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
''$'\300\234'\'''$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
''$'\200\004''"'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K May 28 01:13
''$'\320''_'$'\216\371''[U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:01
''$'\020\226''<'$'\332\332''U'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
'VI$f'
drwxrwx---+    3 AD-ELLERHOLD\user AD-ELLERHOLD\group 4.0K Jun 12 01:00
''$'\227''x'$'\373''e'

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.

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?

The smb.conf of the server:

[global]
     workgroup = AD-ELLERHOLD
     realm     = AD.ELLERHOLD.LAN
     dns proxy = no
     load printers           = no
     printing                = bsd
     printcap name           = /dev/null
     disable spoolss         = yes
     show add printer wizard = no
     panic action = /usr/share/samba/panic-action %d
     server role = member server
     netbios name = SERVER
     security = ADS
     winbind offline logon = yes
     idmap config * : backend = tdb
     idmap config * : range   = 3000-7999
     idmap config AD-ELLERHOLD:backend     = ad
     idmap config AD-ELLERHOLD:range       = 10000-99999
     idmap config AD-ELLERHOLD:schema_mode = rfc2307
     idmap config AD-ELLERHOLD:unix_primary_group = yes
     username map            = /etc/samba/user-map.conf
     winbind refresh tickets = yes
     dedicated keytab file   = /etc/krb5.keytab
     kerberos method         = secrets and keytab
     inherit permissions     = yes
     inherit acls            = yes
     map acl inherit         = yes
     template shell          = /bin/bash
     template homedir        = /home/AD-ELLERHOLD/%U
     vfs objects = catia fruit streams_xattr acl_xattr recycle
     fruit:metadata = stream
     fruit:veto_appledouble = no
     veto files = /.DS_Store/
     delete veto files = yes
     recycle:repository = Papierkorb
     recycle:keeptree = yes
     recycle:touch_mtime = yes
     recycle:directory_mode = 0770
     server min protocol = NT1
     ntlm auth           = mschapv2-and-ntlmv2-only
[my-share]
     force group = +AD-ELLERHOLD\group
     path = /var/storage
     read only = no
     recycle:exclude = *.* *

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Michael Tokarev

2024-Jul-18 09:52 UTC

head link

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

17.07.2024 10:54, Matthias K?hne | 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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