Package: samba
Version: 3.0.22-1
Severity: normal

I say it's grave because the main smbd forks one child instance per
minute which will make the system crash after a while: a DOS attack!

Happens with cifs from kernel 2.6.16 and 2.6.17. NOTE: this bug is an
improvement against earlier kernels because they hung in a similar 
situation and required a manual reboot.

When?

Use a cifs mount (via automount) on your local maschine (this is important:
when working over the network there is no such problem). The data source
itself should be automounted too (via automount again).

Do something via cifs to cause both automounts to mount.

Tell the non-cifs automount to unmount the real data. Tell the cifs
automount to unmount the cifs import.

Now umount.cifs should hang. THIS IS NOT THE REAL PROBLEM. I guess Steve
Frensh tries hard to fix these deadlock problems in his driver. He gets
better with each kernel release...

The problem:

While umount.cifs still hangs the main smbd forks one smdb child every
minute until the main smdb gets killed. If you don't kill it your system
will die as it will run out of resources. Also the syslog gets flooded
with useless CIFS VFS: no response for ... messages.

Yours Jürgen

-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-2-amd
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)

Versions of packages samba depends on:
ii  debconf [debconf-2.0]       1.5.2        Debian configuration management sy
ii  libacl1                     2.2.39-1     Access control list shared library
ii  libattr1                    2.4.32-1     Extended attribute shared library
ii  libc6                       2.3.6-15     GNU C Library: Shared libraries
ii  libcomerr2                  1.39-1       common error description library
ii  libcupsys2                  1.2.1-3      Common UNIX Printing System(tm) - 
ii  libkrb53                    1.4.3-7      MIT Kerberos runtime libraries
ii  libldap2                    2.1.30-13+b1 OpenLDAP libraries
ii  libpam-modules              0.79-3.1     Pluggable Authentication Modules f
ii  libpam-runtime              0.79-3.1     Runtime support for the PAM librar
ii  libpam0g                    0.79-3.1     Pluggable Authentication Modules l
ii  libpopt0                    1.10-2       lib for parsing cmdline parameters
ii  logrotate                   3.7.1-3      Log rotation utility
ii  lsb-base                    3.1-10       Linux Standard Base 3.1 init scrip
ii  netbase                     4.25         Basic TCP/IP networking system
ii  samba-common                3.0.22-1     Samba common files used by both th

Versions of packages samba recommends:
pn  smbldap-tools                 <none>     (no description available)

-- debconf information excluded


-- 
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]

Reply via email to