Re: Segmentation faults in DBMail 3.2

Hello Paul!

DBMail 3.2.2 + fix is working perfectly now! :-)

The problem, btw, was not with “QRESYNC" but with “CONDSTORE" command.

Thanks a lot.

-------
Andrea Brancatelli
Schema 31 S.p.a.
Responsabile IT

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ITALY
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Il giorno 11 gennaio 2015 @ 19:22:17, Paul J Stevens ([email protected]) ha scritto:

Ok,  

Managed to reproduce the problem, and fixed it.  

Try the lastest snapshot to test this - really small fix  

http://git.dbmail.eu/paul/dbmail/commit/?h=dbmail_3_2  

or wait for the next release.  


On 11-01-15 19:12, Paul J Stevens wrote:  
> Excellent! I think I have a fix now. Running all tests first.  
>  
>  
>  
> On 05-01-15 13:07, Claas Kähler wrote:  
>> Okay sorry for the spam, i am not used to gdb. :(  
>> Now complete:  
>>  
>> Program received signal SIGSEGV, Segmentation fault.  
>> [Switching to Thread 0x7fffef9c4700 (LWP 12352)]  
>> 0x0000000000418cd5 in _ic_status_enter (D=0x735b80) at imapcommands.c:1520  
>> 1520 self->mailbox->condstore = true;  
>> (gdb) bt  
>> #0 0x0000000000418cd5 in _ic_status_enter (D=0x735b80) at  
>> imapcommands.c:1520  
>> #1 0x00000000004611df in dm_thread_dispatch (data=0x735b80, user_data=0x0)  
>> at server.c:226  
>> #2 0x00007ffff768188c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0  
>> #3 0x00007ffff7680f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0  
>> #4 0x00007ffff5ffa182 in start_thread (arg=0x7fffef9c4700)  
>> at pthread_create.c:312  
>> #5 0x00007ffff5d26efd in clone ()  
>> at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111  
>>  
>>  
>>  
>> Am 05.01.15 um 13:04 schrieb [email protected]:  
>>> Okay sorry, that wasn't the segfault, i finally got it:  
>>>  
>>> Program received signal SIGSEGV, Segmentation fault.  
>>> [Switching to Thread 0x7fffef9c4700 (LWP 12352)]  
>>> 0x0000000000418cd5 in _ic_status_enter (D=0x735b80) at imapcommands.c:1520  
>>> 1520 self->mailbox->condstore = true;  
>>>  
>>>  
>>>  
>>> Am 05.01.15 um 13:00 schrieb Reindl Harald:  
>>>>  
>>>>  
>>>> Am 05.01.2015 um 12:57 schrieb Claas Kähler:  
>>>>> Hey Paul,  
>>>>>  
>>>>> i did what you told me. Gdb says:  
>>>>>  
>>>>> Program received signal SIGPIPE, Broken pipe.  
>>>>> 0x00007ffff600135d in write () at ../sysdeps/unix/syscall-template.S:81  
>>>>> 81 ../sysdeps/unix/syscall-template.S: File or directory not found.  
>>>>>  
>>>>> It happens if an apple mail client trys to connect.  
>>>>> I hope this is helpfull!  
>>>>  
>>>> not that much without the informations *before* to get a context i guess  
>>>>  
>>>>> Am 28.12.14 um 12:43 schrieb Paul J Stevens:  
>>>>>>  
>>>>>> On 04-12-14 15:56, Claas Kähler wrote:  
>>>>>>> Hallo,  
>>>>>>>  
>>>>>>> i got an annoying segmentation fault from time to time in  
>>>>>>> dbmail-imapd.  
>>>>>>> I am not able to restart the service directy and have to wait for  
>>>>>>> a few  
>>>>>>> minutes. Afterwards it will work agian. Has anybody else this problem  
>>>>>>> too and found a solution?  
>>>>>> I've had more reports of this.  
>>>>>>  
>>>>>>> In the attachment you will find a strace output and a coredump.  
>>>>>> If you could reproduce this with gdb, instead of strace it would be  
>>>>>> very  
>>>>>> helpful.  
>>>>>>  
>>>>>> Compile dbmail with debugging symbols:  
>>>>>>  
>>>>>> dbmail-3.2.2 $> CFLAGS=-g ./configure --enable-static=yes  
>>>>>> dbmail-3.2.2 $> make  
>>>>>> dbmail-3.2.2 $> sudo kill `pidof dbmail-imapd`  
>>>>>> dbmail-3.2.2 $> gdb src/dbmail-imapd  
>>>>>> gdb> run -D -f /path/to/your/dbmail.conf  
>>>>>>  
>>>>>> wait for crash...  
>>>>>> *crash on segfault*  
>>>>>>  
>>>>>> gdb> bt  
>>>>>>  
>>>>>> cut and paste the output of bt.  
>>>>>>  
>>>>>> gdb> quit  
>>>>>> dbmail-3.2.2 $> sudo /usr/sbin/dbmail-imapd  
>>>>>>  
>>>>>>  
>>>>>> Of course stopping and restarting the installed version of  
>>>>>> dbmail-imapd  
>>>>>> is only necessary if you are doing this on your production machine..  
>>>>  
>>>>  
>>>>  
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>  

--  
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Paul J Stevens pjstevns @ gmail, twitter, github, linkedin  
www.nfg.nl/[email protected]/+31.85.877.99.97  
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