[Pkg-samba-maint] Bug#478752: Panic or segfault in Samba
Alec Gosse
Alec.Gosse at GreenBlue.Org
Wed Apr 30 19:02:09 UTC 2008
Package: samba
Version: 3.0.24-6etch9
Linux phone 2.6.18-6-686 #1 SMP Sun Feb 10 22:11:31 UTC 2008 i686
GNU/Linux
libc6 version: 2.3.6.ds1-13etch5
The following email is sent several times a day, I have not been able to
isolate any specific event in the office to cause this:
The Samba 'panic action' script, /usr/share/samba/panic-action,
was called for PID 10866 (/umbd).
This means there was a problem with the program, such as a segfault.
sr/sbin/sBelow is a backtrace for this process generated with gdThe
Samba 'panic action' script, /usr/share/samba/panic-action,
was called for PID 10866 (/usr/sbin/smbd).
This means there was a problem with the program, such as a segfault.
Below is a backtrace for this process generated with gdb, which shows
the state of the program at the time the error occurred. The Samba log
files may contain additional information about the problem.
If the problem persists, you are encouraged to first install the
samba-dbg package, which contains the debugging symbols for the Samba
binaries. Then submit the provided information as a bug report to
Debian. For information about the procedure for submitting bug reports,
please see http://www.debian.org/Bugs/Reporting or the reportbug(1)
manual page.
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1213294912 (LWP 10866)]
0xb7f0a410 in ?? ()
#0 0xb7f0a410 in ?? ()
#1 0x00000001 in ?? ()
#2 0x00000000 in ?? ()
I have installed the samba-dbg package, perhaps I need to do something
to activate it?
The only particularly odd thing that I can think of is the rather
constant presence in the logs of messages like:
log.tophers-compute.old:[2008/04/25 14:54:04, 0]
auth/auth_util.c:create_builtin_administrators(785)
log.tophers-compute.old: create_builtin_administrators: Failed to
create Administrators
log.tophers-compute.old:[2008/04/25 14:56:03, 0]
auth/auth_util.c:create_builtin_administrators(785)
log.tophers-compute.old: create_builtin_administrators: Failed to
create Administrators
Though these messages have been there for a least a year, and the panic
action is a recent development. I'm afraid that I can't tell you
exactly when it started, though the first email I have saved, which may
have been the first one was on April 10
Below is my smb.conf
#======================= Global Settings =======================
[global]
## Browsing/Identification ###
netbios name = MUIR
# Change this to the workgroup/NT-domain name your Samba server will
part of
workgroup = GREENBLUE
# server string is the equivalent of the NT Description field
server string = %h server
# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS
Server
wins support = yes
# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT
both
; wins server = w.x.y.z
# If we receive WINS server info from DHCP, override the options above.
# include = /etc/samba/dhcp.conf
# This will prevent nmbd to search for NetBIOS names through DNS.
dns proxy = no
# What naming service and in what order should we use to resolve host
names
# to IP addresses
name resolve order = lmhosts wins hosts bcast
#### Networking ####
# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
interfaces = 127.0.0.1 lo eth0 eth2 eth0:0
# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine
is
# not protected by a firewall or is a firewall itself. However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
bind interfaces only = true
#### Debugging/Accounting ####
# This tells Samba to use a separate log file for each machine
# that connects
log file = /var/log/samba/log.%m
debug level = 5
# Put a capping on the size of the log files (in Kb).
max log size = 1000
# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
; syslog only = no
# We want Samba to log a minimum amount of information to syslog.
Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to
log
# through syslog you should set the following parameter to something
higher.
syslog = 0
# Do something sensible when Samba crashes: mail the admin a backtrace
panic action = /usr/share/samba/panic-action %d
####### Authentication #######
# "security = user" is always a good idea. This will require a Unix
account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
security = user
# You may wish to use password encryption. See the section on
# 'encrypt passwords' in the smb.conf(5) manpage before enabling.
encrypt passwords = true
# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
passdb backend = smbpasswd
enable privileges = yes
obey pam restrictions = yes
; guest account = nobody
; invalid users = root
; username map = /etc/samba/smbusers
# This boolean parameter controls whether Samba attempts to sync the
Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
unix password sync = yes
# For Unix password sync to work on a Debian GNU/Linux system, the
following
# parameters must be set (thanks to Ian Kahan
<<kahan at informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian
Sarge).
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\sUNIX\spassword:* %n\n
*Retype\snew\sUNIX\spassword:* %n\n *password\supdated\ssuccessfully* .
# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
pam password change = yes
########## Domains ###########
# Is this machine able to authenticate users. Both PDC and BDC
# must have this setting enabled. If you are the BDC you must
# change the 'domain master' setting to no
#
domain logons = yes
#
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of the user's profile directory
# from the client point of view)
# The following required a [profiles] share to be setup on the
# samba server (see below)
; logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home
directory
; logon path = \\%N\%U\profile
# no roaming profiles
logon path =
logon home =
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
logon drive = H:
; logon home = \\%N\%U
# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
logon script = netlogon.bat
# This allows Unix users to be created on the domain controller via the
SAMR
# RPC pipe. The example command creates a user account with a disabled
Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password
--gecos "" %u
add user script = useradd -m -G staff %u
########## Printing ##########
# If you want to automatically load your printer list rather
# than setting them up individually then you'll need this
load printers = no
# lpr(ng) printing. You may wish to override the location of the
# printcap file
; printing = bsd
; printcap name = /etc/printcap
# CUPS printing. See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
; printing = cups
; printcap name = cups
# When using [print$], root is implicitly a 'printer admin', but you can
# also give this right to other users to add drivers and set printer
# properties
; printer admin = @ntadmin
############ Misc ############
# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
; include = /home/samba/etc/smb.conf.%m
# Most people will find that this option gives better performance.
# See smb.conf(5) and
/usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
# for details
# You may want to add the following on a Linux system:
# SO_RCVBUF=8192 SO_SNDBUF=8192
socket options = TCP_NODELAY
# The following parameter is useful only if you have the linpopup
package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
; message command = /bin/sh -c '/usr/bin/linpopup "%f" "%m" %s; rm %s'
&
# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to 'no'; otherwise, the default behavior is recommended.
domain master = yes
preferred master = yes
local master = yes
# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
; idmap uid = 10000-20000
; idmap gid = 10000-20000
; template shell = /bin/bash
;
; The following was the default behaviour in sarge
; but samba upstream reverted the default because it might induce
; performance issues in large organizations
; See #368251 for some of the consequences of *not* having
; this setting and smb.conf(5) for all details
;
winbind enum groups = yes
winbind enum users = yes
#======================= Share Definitions =======================
[homes]
comment = Home Directories
browseable = no
# By default, the home directories are exported read-only. Change next
# parameter to 'yes' if you want to be able to write to them.
writable = yes
# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
create mask = 0700
# Directory creation mask is set to 0700 for security reasons. If you
want to
# create dirs. with group=rw permissions, set next parameter to 0775.
directory mask = 0700
# Restrict access to home directories
# to the one of the authenticated user
# This might need tweaking when using external authentication schemes
valid users = %S
# Un-comment the following and create the netlogon directory for Domain
Logons
# (you need to configure Samba to act as a domain controller too.)
[netlogon]
comment = Network Logon Service
path = /home/samba/netlogon
guest ok = yes
writable = no
share modes = no
browseable = no
read only = yes
# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
;[profiles]
; comment = Users profiles
; path = /home/samba/profiles
; guest ok = no
; browseable = no
; create mask = 0600
; directory mask = 0700
;[printers]
; comment = All Printers
; browseable = no
; path = /var/spool/samba
; printable = yes
; public = no
; writable = no
; create mode = 0700
# Windows clients look for this share name as a source of downloadable
# printer drivers
#[print$]
# comment = Printer Drivers
# path = /home/samba/printers
# browseable = yes
# read only = yes
# guest ok = no
## Uncomment to allow remote administration of Windows print drivers.
# Replace 'ntadmin' with the name of the group your admin users are
# members of.
; write list = root, @ntadmin
[greenblue]
comment = General GreenBlue Information
path = /home/samba/greenblue
browseable = yes
read only = no
writeable = yes
printable = no
inherit permissions = yes
create mode = 0660
valid users = @staff
force group = staff
force create mode = 0660
force directory mode = 0770
[greenblue-x]
comment = GreenBlue Business Information
path = /home/samba/greenblue-x
read only = no
writeable = yes
printable = no
inherit permissions = yes
create mode = 0660
force directory mode = 0770
force group = corporate
valid users = @corporate
[projects]
comment = Project Information for GreenBlue
path = /home/samba/projects
read only = no
writeable = yes
printable = no
inherit permissions = yes
create mode = 0660
force directory mode = 0770
force group = staff
valid users = @staff
[training]
comment = Training Resources
path = /home/samba/training
read only = no
writeable = yes
printable = no
inherit permissions = yes
create mode = 0660
force directory mode = 0770
force group = staff
valid users = @staff
[netboot]
comment = Boot Loader Files for the Network
path = /tftpboot
read only = no
writeable = yes
printable = no
inherit permissions = yes
create mode = 0777
force directory mode = 0777
force group = staff
valid users = @staff
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