Samba4 panic action

[steve]

On 12/10/12 20:56, Jeremy Allison wrote:
> On Fri, Oct 12, 2012 at 04:22:39PM +0200, steve wrote:
>> On 12/10/12 14:21, Ricky Nance wrote:
>>> Steve, if you are building from git, the file gdb_backtrace can be found
>>> at samba-master/selftest/gdb_backtrace, you will just simply add the
>>> line to your smb.conf pointing at that file, and restart samba, then try
>>> to recreate the bug. You should then get backtraces in
>>> /usr/local/samba/var as files.
>>>
>>> Ricky
>>
>> Hi Ricky.
>> Thanks. Much easier.
>> Cheers,
>> Steve
>>
>> Here is the trace:
>>
>> /usr/local/samba/sbin/smbd: smb_panic(): calling panic action
>> [/home/steve/samba-master/selftest/gdb_backtrace 2716]
>> Kerberos: TGS-REQ authtime: 2012-10-12T16:13:58 starttime:
>> 2012-10-12T16:14:51 endtime: 2012-10-13T02:13:58 renew till:
>> 2012-10-19T16:13:58
>> Tkey handshake completed
>> Terminating connection - 'dns_tcp_call_loop:
>> tstream_read_pdu_blob_recv() - NT_STATUS_CONNECTION_DISCONNECTED'
>> single_terminate: reason[dns_tcp_call_loop:
>> tstream_read_pdu_blob_recv() - NT_STATUS_CONNECTION_DISCONNECTED]
>> /usr/local/samba/sbin/smbd: [Thread debugging using libthread_db enabled]
>> /usr/local/samba/sbin/smbd: Using host libthread_db library
>> "/lib/libthread_db.so.1".
>> /usr/local/samba/sbin/smbd: 0xb775b424 in __kernel_vsyscall ()
>> /usr/local/samba/sbin/smbd: #0  0xb775b424 in __kernel_vsyscall ()
>> /usr/local/samba/sbin/smbd: No symbol table info available.
>> /usr/local/samba/sbin/smbd: #1  0xb6a78523 in __waitpid_nocancel ()
>> from /lib/libc.so.6
>> /usr/local/samba/sbin/smbd: No symbol table info available.
>> /usr/local/samba/sbin/smbd: #2  0xb6a015c0 in do_system () from
>> /lib/libc.so.6
>> /usr/local/samba/sbin/smbd: No symbol table info available.
>> /usr/local/samba/sbin/smbd: #3  0xb772eecb in system () from
>> /lib/libpthread.so.0
>> /usr/local/samba/sbin/smbd: No symbol table info available.
>> /usr/local/samba/sbin/smbd: #4  0xb710d65b in smb_panic_s3
>> (why=0xb7712881 "internal error") at ../source3/lib/util.c:823
>> /usr/local/samba/sbin/smbd:         cmd = 0x99f38f0
>> "/home/steve/samba-master/selftest/gdb_backtrace 2716"
>> /usr/local/samba/sbin/smbd:         result = -1081235480
>> /usr/local/samba/sbin/smbd:         __FUNCTION__ = "smb_panic_s3"
>> /usr/local/samba/sbin/smbd: #5  0xb7700ea2 in smb_panic
>> (why=0xb7712881 "internal error") at ../lib/util/fault.c:159
>> /usr/local/samba/sbin/smbd: No locals.
>> /usr/local/samba/sbin/smbd: #6  0xb7700b63 in fault_report (sig=11)
>> at ../lib/util/fault.c:77
>> /usr/local/samba/sbin/smbd:         counter = 1
>> /usr/local/samba/sbin/smbd:         __FUNCTION__ = "fault_report"
>> /usr/local/samba/sbin/smbd: #7  0xb7700b74 in sig_fault (sig=11) at
>> ../lib/util/fault.c:88
>> /usr/local/samba/sbin/smbd: No locals.
>> /usr/local/samba/sbin/smbd: #8  <signal handler called>
>> /usr/local/samba/sbin/smbd: No symbol table info available.
>> /usr/local/samba/sbin/smbd: #9  0xb695556a in security_token_has_sid
>> (token=0x0, sid=0x99f3790) at
>> ../libcli/security/security_token.c:109
>> /usr/local/samba/sbin/smbd:         i = 0
>> /usr/local/samba/sbin/smbd: #10 0xb6955bb4 in se_access_check
>> (sd=0x99f35d0, token=0x0, access_desired=1,
>> access_granted=0xbf8dae78) at ../libcli/security/access_check.c:229
>
> Very interesting backtrace. We have the pointer token=0x0, which I should not
> be possible. Luckily this is in master so won't break 4.0.0rc's
>
> Jeremy.
>
Hi Jeremey, hi everyone
I don't know whether this will help, but further tests show that it only 
occurs when starting LibreOffice (any version) with Administrator and 
only in XP. Other user accounts work fine with LibreOffice in both XP 
and w7. The Administrator account also works fine with LibreOffice in w7.
HTH
Cheers,
Steve