samba - Jun 2000 - Signal 11 (cause and workaround found)

I encountered an bug in samba 2.0.7.

With the config option "logon home = \\%N\%U\profile" in smb.conf and
roaming profiles, smbd panics when the share "%U" is not listed in
smb.conf.
I had some users for which i forgot to enter the accompanying share in
smb.conf. When such a user logged in or logged off, smbd paniced with signal
11. While on logging off the profiles where written from the client to the
server, all profile entries except the directories got lost. As you can
imagine, this caused heavy problems when the user "roamed".
Unfortunately
the error is not reproduceable at _any_ time. Means, sometimes there is no
"panic" nor the profiles got lost. But after appling the
"workaround" (see
end of mail) there were no more "panics" or lost profiles over days.
The
"panic" only occured to users with shares not explicitly listed in the
smb.conf. Also this error didn't occur in versions prior to 2.0.6. I think
there is a problem with the new code regarding the differences in "logon
home" and "logon path" as the panic only passes on logging on and
off.

The "environment" for "userX" is:

all client systems are Windows95a/b/c.
unix username = userX
windows logon name = userX
home directory of userX in /etc/passwd = "/u/samba/pc/userX"
the home directory is rwx for userX and owned by userX
there were NO share entry [userX] in smb.conf

smb.conf looks like:

[global]
  ...
  dead time = 15
  os level = 65
  time server = yes
  domain master = yes
  local master = yes
  preferred master = yes
  wins support = yes
  security = USER
  encrypt passwords = yes
  lock directory = /u/samba/locks
  server string = "samba %v on %h
  workgroup = AWORKGROUP
  ...
  preserve case = yes
  short preserve case = yes
  client code page = 850
  domain logons = yes
  name resolve order = host wins
  logon script = startup.bat
;-->    logon path deals with WinNT only
  logon path = \\%N\%U\profile
;-->    logon home deals with Win9x (net use h: /home) and profiles
  logon home = \\%N\%U\profile
  ...

[homes]
  comment = User Home-Directories
  browsable = no
  read only = no
  public = no
  create mode = 0700

Workaround!

After i added:

[userX]
  comment = Home for UserX
  path = /u/samba/pc/userX
  valid users = userX
  public = no
  writeable = yes
  printable = no

to smb.conf, no more "panics" are encounterd or profiles got lost.

If a member of the samba team needs a log (at loglevel=3) please mail to me.

Regards
Rudolf Kollien
email: Rudolf.Kollien@medas.de
       Rudolf.Kollien@kollien.de
*********************************************************
Never trust a operating system you have no sources for
*********************************************************
Buying an operating system without source is like buying
a self-assembly Space Shuttle with no instructions.
*********************************************************

Cris, I had the same error even with NT Servers dishing out the files. I
fixed that problem by updating the network card drivers and going to the
lastest Service Pack (6a). Also go to this page at support.microsoft.com for
more info.
http://support.microsoft.com/support/kb/articles/Q148/4/26.ASP?LN=EN-US&SD=g
n&FR=0
url maybe wrapped,
(?`?.??.???`?.??.???`?.??.???`?.??.???)
    Luis Carlos Luna, Associate AIA
         Work: 612.332.1234
    mailto:luis@btr-architects.com

We use a single NT4 terminal server and SAMBA 2.07 running under Solaris 2.6
on a SUN Classic. As well as several WIn95/98 and NT clients.

I have not seen any problems like yours.

The only specials in smb.conf are:


nt smb support = no

dead time = 5
socket options = SO_KEEPALIVE

and lpq cache tome = 40  to cope with the several printers we have some on
other slow UNIX servers.

We have had problems with NT Terminal server but I am sure these have not
been SAMBA related.

Robert

Hi to everyone:

First sorry about my english, I know its realy bad .
I am very new configuring SAMBA.

The version I am working is samba-2.0.6-7cl and have windows and Linux Conectiva
(whit DOS EMU and PTSDOS) clients.
I try to migrate an NT4.0 server to SAMBA.

My public files and home directories work ok.
But when i probe multiple access to a clipper database whit windows and Linux
clients simultaneously the database crashes, and the index introduced by the
windows clients
disappear .
I configure this whit Webmin tools but adds some stuff and duplicate the GLOBAL
profile in the smb.conf file, so I decide to modify the file in text mode

First the files changed by windows clients appear whit users nobody.nobody, and
i correct this, now they appear to be created by root.users,  when deny guest
allow to this
share directory.

But my principal trouble is that how i can allow simultaneously access to the
database whithout crashes (same as windows systems, but I don't come back to
NT)

My Linux workstations works mounting the share directory and loading DOSEMU whit
PTSDOS.


The configuration of the share file is:

[ventas]
    path = /ventas
    comment = CARPETA VENTAS
    public = no
    users = jorge,ventas,....
    writable = yes
    create mask = 0777                    # to allow all modify the files
    locking = yes
    guest ok = no
    browseable = yes
    printable = no


This system is in test mode but i really hope that works in order to chance to
Linux all my systems.

Regards
Fabrizio Rossel
Conectiva Per?
fabrizio@conectiva.com.pe

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