Samba4 - random crash

[Matthieu Patou]

On 31/01/2011 18:24, Taylor, Jonn wrote:
>
> On 01/31/2011 01:46 AM, Matthieu Patou wrote:
>> On 31/01/2011 04:27, Taylor, Jonn wrote:
>>> About once a week samba4 alpha 14 is randomly crashing.
>>>
>>> CentOS 5.5 x86_64
>>> Samba4 alpha14 tar ball
>>>
>>> [Sat Jan 29 22:00:02 2011 CST, 0
>>> ../librpc/rpc/dcerpc_smb.c:311:smb_write_callback()]
>>> dcerpc_smb: write callback error
>>> [Sat Jan 29 22:00:02 2011 CST, 0
>>> ../../lib/util/debug.c:185:talloc_log_fn()]
>>> talloc: double free error - first free may be at
>>> ../librpc/rpc/dcerpc_smb.c:390
>>> [Sat Jan 29 22:00:02 2011 CST, 0
>>> ../../lib/util/debug.c:185:talloc_log_fn()]
>>> Bad talloc magic value - double free
>>> [Sat Jan 29 22:00:02 2011 CST, 0 ../../lib/util/fault.c:143:smb_panic()]
>>> PANIC: Bad talloc magic value - double free
>>> [Sat Jan 29 22:00:02 2011 CST, 0
>>> ../../lib/util/fault.c:62:call_backtrace()]
>>> BACKTRACE: 20 stack frames:
>>>    #0 /usr/local/samba/lib/libsamba-util.so.0(call_backtrace+0x1c)
>>> [0x2ac0181a1f4c]
>>>    #1 /usr/local/samba/lib/libsamba-util.so.0(smb_panic+0x1f1)
>>> [0x2ac0181a21eb]
>>>    #2 /usr/local/samba/lib/samba/libtalloc-samba4.so.2 [0x2ac0189f8c5a]
>>>    #3 /usr/local/samba/lib/samba/libtalloc-samba4.so.2 [0x2ac0189f8cd9]
>>>    #4 /usr/local/samba/lib/samba/libtalloc-samba4.so.2 [0x2ac0189f8def]
>>>    #5
>>> /usr/local/samba/lib/samba/libtalloc-samba4.so.2(talloc_get_name+0x15)
>>> [0x2ac0189fa3c0]
>>>    #6
>>> /usr/local/samba/lib/samba/libtalloc-samba4.so.2(talloc_check_name+0x33)
>>> [0x2ac0189fa450]
>>>    #7 /usr/local/samba/lib/libdcerpc.so.0 [0x2ac0194e5bc6]
>>>    #8 /usr/local/samba/lib/libdcerpc.so.0 [0x2ac01952add3]
>>>    #9 /usr/local/samba/lib/samba/libauthkrb5-samba4.so(packet_recv+0x8f7)
>>> [0x2ac01afbd840]
>>>    #10 /usr/local/samba/lib/libdcerpc.so.0 [0x2ac019529b0f]
>>>    #11 /usr/local/samba/lib/samba/libtevent-samba4.so.0 [0x2ac0187f1faa]
>>>    #12 /usr/local/samba/lib/samba/libtevent-samba4.so.0 [0x2ac0187f2688]
>>>    #13
>>> /usr/local/samba/lib/samba/libtevent-samba4.so.0(_tevent_loop_once+0xdf)
>>> [0x2ac0187ee5bb]
>>>    #14
>>> /usr/local/samba/lib/samba/libtevent-samba4.so.0(tevent_common_loop_wait+0x1f)
>>>
>>> [0x2ac0187ee7e0]
>>>    #15
>>> /usr/local/samba/lib/samba/libtevent-samba4.so.0(_tevent_loop_wait+0x25)
>>> [0x2ac0187ee89c]
>>>    #16 /usr/local/samba/sbin/samba [0x40a4bb]
>>>    #17 /usr/local/samba/sbin/samba [0x40a509]
>>>    #18 /lib64/libc.so.6(__libc_start_main+0xf4) [0x35c761d994]
>>>    #19 /usr/local/samba/sbin/samba [0x404429]
>> Can you put your server under network trace so that we can understand
>> which kind of request generate this pb ?
>>
>> Matthieu.
>>
>>
>>
> Yes, What kind of trace to you need?
network trace: tcpdump -i any host ip_of_domain_controler -s 0 -w file -v
This command has to be started on the DC.


Matthieu.

--

Matthieu Patou
Samba Team        http://samba.org
Private repo      http://git.samba.org/?p=mat/samba.git;a=summary