[Samba] Re: INTERNAL ERROR: Signal 11 in pid 8928 (3.0.23c)

Nolan Garrett nolan at massivegeek.com
Mon Sep 18 18:32:35 GMT 2006


Jeremy Allison wrote:
> On Sat, Sep 16, 2006 at 02:25:47PM -0700, Nolan Garrett wrote:
>> Hello!
>>
>> It seems my struggle with Samba isn't quite over.  My latest problem is
>> exactly what you see above, followed by an attempt to core dump.  This
>> occurs upon authentication to the system.  My system is part of a W2K3
>> domain.  I looked at the Samba HOWTO, but apparently I have a system
>> (FC5), that doesn't allow core dumps when the PID changes, since no core
>> dumps are being created.  Also, smbstatus doesn't give me a PID, so I am
>> having a hard time running gdb to further understand this issue.  Here
>> is the log output:
>>
 snip
>>
>> I'm running:
>> samba-3.0.23c-4
>> samba-client-3.0.23c-4
>> samba-common-3.0.23c-4
>>
>> Any ideas on this?
> 
> For a core dump, add the lines :
> 
> panic action = /bin/sleep 999999
> 
> to the [global] section of your smb.conf, and
> reproduce the problem. The smbd will hang waiting
> for the sleep to finish, allowing you to attach
> to the waiting smbd process with gdb. You can then
> print out a backtrace with symbols which is a much
> more helpful review of the problem.
> 
> Thanks,
> 
> 	Jeremy.
> 


I appreciate the response!  I am not 100% familiar with gdb, but I did
what I could to get some more information.  Here are the results of the
"backtrace" command in gdb:

#0  0x00203402 in __kernel_vsyscall ()
#1  0x0049a4a3 in __waitpid_nocancel () from /lib/libc.so.6
#2  0x0044293f in do_system () from /lib/libc.so.6
#3  0x0060203d in system () from /lib/libpthread.so.0
#4  0x00af7b7d in smb_panic () from /usr/sbin/smbd
#5  0x00ae349a in dump_core_setup () from /usr/sbin/smbd
#6  <signal handler called>
#7  0x00b3fd54 in create_token_from_username () from /usr/sbin/smbd
#8  0x00b40d61 in create_local_token () from /usr/sbin/smbd
#9  0x00b42b55 in auth_ntlmssp_start () from /usr/sbin/smbd
#10 0x009ce5b8 in ntlmssp_set_username () from /usr/sbin/smbd
#11 0x009ccaa2 in ntlmssp_update () from /usr/sbin/smbd
#12 0x00b427eb in auth_ntlmssp_update () from /usr/sbin/smbd
#13 0x0095d4a9 in reply_sesssetup_and_X () from /usr/sbin/smbd
#14 0x0098b0d0 in open_was_deferred () from /usr/sbin/smbd
#15 0x0098c20b in smbd_process () from /usr/sbin/smbd
#16 0x00ba6110 in main () from /usr/sbin/smbd


"backtrace full" gives me:

#0  0x00203402 in __kernel_vsyscall ()
No symbol table info available.
#1  0x0049a4a3 in __waitpid_nocancel () from /lib/libc.so.6
No symbol table info available.
#2  0x0044293f in do_system () from /lib/libc.so.6
No symbol table info available.
#3  0x0060203d in system () from /lib/libpthread.so.0
No symbol table info available.
#4  0x00af7b7d in smb_panic () from /usr/sbin/smbd
No symbol table info available.
#5  0x00ae349a in dump_core_setup () from /usr/sbin/smbd
No symbol table info available.
#6  <signal handler called>
No symbol table info available.
#7  0x00b3fd54 in create_token_from_username () from /usr/sbin/smbd
No symbol table info available.
#8  0x00b40d61 in create_local_token () from /usr/sbin/smbd
No symbol table info available.
#9  0x00b42b55 in auth_ntlmssp_start () from /usr/sbin/smbd
No symbol table info available.
#10 0x009ce5b8 in ntlmssp_set_username () from /usr/sbin/smbd
No symbol table info available.
#11 0x009ccaa2 in ntlmssp_update () from /usr/sbin/smbd
No symbol table info available.
#12 0x00b427eb in auth_ntlmssp_update () from /usr/sbin/smbd
No symbol table info available.
#13 0x0095d4a9 in reply_sesssetup_and_X () from /usr/sbin/smbd
No symbol table info available.
#14 0x0098b0d0 in open_was_deferred () from /usr/sbin/smbd
No symbol table info available.
#15 0x0098c20b in smbd_process () from /usr/sbin/smbd
No symbol table info available.
#16 0x00ba6110 in main () from /usr/sbin/smbd
No symbol table info available.

Clearly I don't have a package that was compiled with symbols.  Is it
easy to rebuild the FC5 rpms from samba.org with debug symbols?

Thanks!

Nolan



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