[Pkg-samba-maint] Bug#526325: samba: Segfaults in rep_strlcpy

[Sam Morris]

Package: samba
Version: 2:3.3.3-1
Severity: normal

Over the last couple weeks I have received about twenty mails telling me that
Samba segfaulted. They all have the following backtrace:

#0  0x00007fa78606b4a5 in __libc_waitpid (pid=459, stat_loc=0x7fff914c8b1c,
    options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:32
#1  0x00007fa78600a1e1 in do_system (
    line=0x20ffa10 "/usr/share/samba/panic-action 30781")
    at ../sysdeps/posix/system.c:149
#2  0x0000000000599b00 in smb_panic (why=<value optimized out>)
    at lib/util.c:1679
#3  0x0000000000587277 in sig_fault (sig=11) at lib/fault.c:46
#4  <signal handler called>
#5  0x0000000000575d69 in rep_strlcpy (d=0x7fff914c901c "", s=0x0, bufsize=256)
    at lib/replace/replace.c:64
#6  0x00000000005a6e3e in connections_fetch_entry (mem_ctx=0x0,
    conn=<value optimized out>, name=0x0) at lib/conn_tdb.c:65
#7  0x0000000000487439 in yield_connection (conn=0x2114970, name=0x0)
    at smbd/connection.c:33
#8  0x00000000004aba9c in close_cnum (conn=0x2114970, vuid=0)
    at smbd/service.c:1328
#9  0x000000000078a7c5 in reply_tdis (req=0x210f6c0) at smbd/reply.c:4605
#10 0x00000000004a9447 in switch_message (type=113 'q', req=0x210f6c0,
    size=<value optimized out>) at smbd/process.c:1486
#11 0x00000000004ab7e5 in smbd_process () at smbd/process.c:1509
#12 0x00000000004790a1 in main (argc=<value optimized out>, argv=0x2)
    at smbd/server.c:1523

I can't think of anything I'm doing to trigger this, it just seems to happen
occasionally. I haven't noticed any interruption in service to clients.

The server itself is just my laptop, sharing a few files to other client
machines. Nothing heavy.

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (530, 'testing'), (520, 'unstable'), (400, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.29-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages samba depends on:
ii  adduser              3.110               add and remove users and groups
ii  debconf [debconf-2.0 1.5.26              Debian configuration management sy
ii  libacl1              2.2.47-2            Access control list shared library
ii  libattr1             1:2.4.43-2          Extended attribute shared library
ii  libc6                2.9-4               GNU C Library: Shared libraries
ii  libcap2              1:2.16-5            support for getting/setting POSIX.
ii  libcomerr2           1.41.3-1            common error description library
ii  libcups2             1.3.8-1lenny4.1     Common UNIX Printing System(tm) - 
ii  libgnutls26          2.6.4-2             the GNU TLS library - runtime libr
ii  libgssapi-krb5-2     1.6.dfsg.4~beta1-13 MIT Kerberos runtime libraries - k
ii  libk5crypto3         1.6.dfsg.4~beta1-13 MIT Kerberos runtime libraries - C
ii  libkrb5-3            1.6.dfsg.4~beta1-13 MIT Kerberos runtime libraries
ii  libldap-2.4-2        2.4.11-1            OpenLDAP libraries
ii  libpam-modules       1.0.1-9             Pluggable Authentication Modules f
ii  libpam-runtime       1.0.1-9             Runtime support for the PAM librar
ii  libpam0g             1.0.1-9             Pluggable Authentication Modules l
ii  libpopt0             1.14-4              lib for parsing cmdline parameters
ii  libtalloc1           1.2.1-1             hierarchical pool based memory all
ii  libwbclient0         2:3.3.3-1           Samba winbind client library
ii  logrotate            3.7.7-3             Log rotation utility
ii  lsb-base             3.2-22              Linux Standard Base 3.2 init scrip
ii  procps               1:3.2.7-11          /proc file system utilities
ii  samba-common         2:3.3.3-1           common files used by both the Samb
ii  update-inetd         4.31                inetd configuration file updater
ii  zlib1g               1:1.2.3.3.dfsg-13   compression library - runtime

samba recommends no packages.

Versions of packages samba suggests:
pn  ctdb                        <none>       (no description available)
pn  ldb-tools                   <none>       (no description available)
ii  openbsd-inetd [inet-superse 0.20080125-2 The OpenBSD Internet Superserver
pn  smbldap-tools               <none>       (no description available)

-- debconf information:
  samba/run_mode: daemons
  samba/generate_smbpasswd: true