[Samba] Samba segment faulting - unknown cause

[Mike Hodgkinson]

Hello,

Recently our Samba server has started segment faulting. It happens occasionally, but is often enough to cause disruption. 
People notice thier network drives freeze, I am unsure of the cause of the segment fault, and have no experience debugging backtraces.
Can anoyone lend a hand?

We are running Samba as a primary domain controller with an Openldap backend on another server, both on debian linux sarge stable.
Versions:
Samba server
ii  samba          3.0.14a-3     
ii  samba-common   3.0.14a-3    
ii  smbclient      3.0.14a-3      
ii  smbfs          3.0.14a-3      
ii  smbldap-tools  0.8.7-4        
ii  libpam-ldap    178-1 
ii  libnss-ldap    238-1          
ii  libc6          2.3.2.ds1-22
Openldap server
ii  ldap-utils     2.2.23-8       OpenLDAP utilities
ii  libldap-2.2-7  2.2.23-8       OpenLDAP libraries
ii  libldap2       2.1.30-8       OpenLDAP libraries
rc  libnss-ldap    238-1          NSS module for using LDAP as a naming servic
rc  libpam-ldap    178-1          Pluggable Authentication Module allowing LDA
ii  libc6          2.3.2.ds1-22   
ii  libc6-sparc64  2.3.2.ds1-22 


Email recieved
---------------------------------------
The Samba 'panic action' script, /usr/share/samba/panic-action,
was called for pid 5720 (/usr/sbin/smbd).

Below is a backtrace for this process generated with gdb, which shows
the state of the program at the time the error occured.  You are
encouraged to submit this 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) manpage.

(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 5720)]
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0x4023b808 in waitpid () from /lib/libc.so.6
#0  0x4023b808 in waitpid () from /lib/libc.so.6
#1  0x402c3880 in ?? () from /lib/libc.so.6
#2  0x401d44c2 in strtold_l () from /lib/libc.so.6
#3  0x081eb261 in smb_panic2 ()
#4  0x081eb1ea in smb_panic ()
#5  0x081d7368 in dbgtext ()
#6  0x4034e825 in __pthread_sighandler () from /lib/libpthread.so.0
#7  <signal handler called>
#8  0x401bd7c1 in kill () from /lib/libc.so.6
#9  0x4034b771 in pthread_kill () from /lib/libpthread.so.0
#10 0x4034ba7b in raise () from /lib/libpthread.so.0
#11 0x401bd554 in raise () from /lib/libc.so.6
#12 0x401bea88 in abort () from /lib/libc.so.6
#13 0x401b6bbf in __assert_fail () from /lib/libc.so.6
#14 0x4002ddcd in ldap_int_sasl_open () from /usr/lib/libldap_r.so.2
#15 0x4002845e in ldap_int_open_connection () from /usr/lib/libldap_r.so.2
#16 0x4003a299 in ldap_new_connection () from /usr/lib/libldap_r.so.2
#17 0x40027f11 in ldap_open_defconn () from /usr/lib/libldap_r.so.2
#18 0x40039e0f in ldap_send_initial_request () from /usr/lib/libldap_r.so.2
#19 0x40030137 in ldap_sasl_bind () from /usr/lib/libldap_r.so.2
#20 0x4003040b in ldap_sasl_bind_s () from /usr/lib/libldap_r.so.2
#21 0x40030c7c in ldap_simple_bind_s () from /usr/lib/libldap_r.so.2
#22 0x08261b7d in smbldap_make_mod ()
#23 0x08261ebe in smbldap_make_mod ()
#24 0x08262214 in smbldap_make_mod ()
#25 0x0826240a in smbldap_search ()
#26 0x08262b04 in smbldap_search_suffix ()
#27 0x081ba9d8 in ldapsam_search_suffix_by_name ()
#28 0x081be181 in ldapsam_search_suffix_by_name ()
#29 0x081b4ac5 in smb_register_passdb ()
#30 0x081b6b88 in pdb_getsampwnam ()
#31 0x08225f3c in auth_rhosts_init ()
#32 0x082265b1 in auth_rhosts_init ()
#33 0x082239ff in smb_register_auth ()
#34 0x0822d809 in password_ok ()
#35 0x0810fad1 in ntlmssp_end ()
#36 0x0810f0db in ntlmssp_update ()
#37 0x0822db2d in auth_ntlmssp_update ()
#38 0x080b0a71 in reply_getattrE ()
#39 0x080b0d44 in reply_getattrE ()
#40 0x080b1d18 in reply_sesssetup_and_X ()
#41 0x080d7a76 in respond_to_all_remaining_local_messages ()
#42 0x080d7d00 in respond_to_all_remaining_local_messages ()
#43 0x080d7f0c in process_smb ()
#44 0x080d8c58 in smbd_process ()
#45 0x082655f5 in main ()


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