[Dovecot] segfault in Debian Squeeze + Dovecot 2.1.10

[Joe Auty]

Are performance issues a possible symptom of this problem? It was 
mentioned that this happens after disconnects, but does this break IDLE?
>
> Birta Levente <mailto:blevi.linux at gmail.com>
> September 27, 2012 9:25 AM
>
> Hi Timo
>
> I just want to ask you: this issue is still in your task list?
> If you need more debug information please tell me how can I give you.
>
>     Thanks,
>     Levi
>
>
> Timo Sirainen <mailto:tss at iki.fi>
> September 24, 2012 10:58 AM
>
> Show your doveconf -n output at least. As for debugging information, 
> that would depend on how you installed Dovecot? From some RPM or sources?
>
>
> Birta Levente <mailto:blevi.linux at gmail.com>
> September 24, 2012 10:55 AM
>
>
> I have the same problem, but on centos 6.3 64bit. How can I give you 
> the debug information?
>
>     Levi
>
>
> Timo Sirainen <mailto:tss at iki.fi>
> September 24, 2012 10:32 AM
>
> Well, the good news is that it crashes only after it has already 
> disconnected the client anyway. But I thought I fixed this bug in 
> v2.1.10 and I'm not able to reproduce it myself.. Having debugging 
> information available might show something useful. Try installing 
> dovecot-dbg package and getting the bt full again?
>
>
> Joe Auty <mailto:joe at netmusician.org>
> September 23, 2012 7:05 AM
>>
>> Timo Sirainen <mailto:tss at iki.fi>
>> September 23, 2012 5:58 AM
>>
>>
>> You should have a similar log line about the crash in mail.log (or 
>> wherever "doveadm log find" says that errors get logged). Find those 
>> lines, then configure login processes to dump core files. This 
>> probably should work:
>>
>> service imap-login {
>> executable = imap-login -D
>> }
>>
>> Next time it crashes hopefully you'll have 
>> /var/run/dovecot/login/core* file(s). Get a gdb backtrace from it 
>> send it:
>>
>> gdb /usr/lib/dovecot/imap-login /var/run/dovecot/login/core
>> bt full
>
> I hope I'm doing this correctly!
>
> # gdb /usr/lib/dovecot/imap-login /var/run/dovecot/login/core
> GNU gdb (GDB) 7.0.1-debian
> Copyright (C) 2009 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later 
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show 
> copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /usr/lib/dovecot/imap-login...(no debugging 
> symbols found)...done.
>
> warning: Can't read pathname for load map: Input/output error.
> Reading symbols from /usr/lib/dovecot/libdovecot-login.so.0...(no 
> debugging symbols found)...done.
> Loaded symbols for /usr/lib/dovecot/libdovecot-login.so.0
> Reading symbols from /usr/lib/dovecot/libdovecot.so.0...(no debugging 
> symbols found)...done.
> Loaded symbols for /usr/lib/dovecot/libdovecot.so.0
> Reading symbols from /lib/libc.so.6...(no debugging symbols 
> found)...done.
> Loaded symbols for /lib/libc.so.6
> Reading symbols from /usr/lib/libssl.so.0.9.8...(no debugging symbols 
> found)...done.
> Loaded symbols for /usr/lib/libssl.so.0.9.8
> Reading symbols from /usr/lib/libcrypto.so.0.9.8...(no debugging 
> symbols found)...done.
> Loaded symbols for /usr/lib/libcrypto.so.0.9.8
> Reading symbols from /lib/librt.so.1...(no debugging symbols 
> found)...done.
> Loaded symbols for /lib/librt.so.1
> Reading symbols from /lib/libdl.so.2...(no debugging symbols 
> found)...done.
> Loaded symbols for /lib/libdl.so.2
> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging 
> symbols found)...done.
> Loaded symbols for /lib64/ld-linux-x86-64.so.2
> Reading symbols from /usr/lib/libz.so.1...(no debugging symbols 
> found)...done.
> Loaded symbols for /usr/lib/libz.so.1
> Reading symbols from /lib/libpthread.so.0...(no debugging symbols 
> found)...done.
> Loaded symbols for /lib/libpthread.so.0
> Core was generated by `dovecot/imap-login   ?'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x00007f789cd08e14 in hash_table_destroy () from 
> /usr/lib/dovecot/libdovecot.so.0
> (gdb) bt full
> #0  0x00007f789cd08e14 in hash_table_destroy () from 
> /usr/lib/dovecot/libdovecot.so.0
> No symbol table info available.
> #1  0x00007f789ccda054 in settings_parser_deinit () from 
> /usr/lib/dovecot/libdovecot.so.0
> No symbol table info available.
> #2  0x00007f789ccff33d in master_service_settings_cache_deinit () from 
> /usr/lib/dovecot/libdovecot.so.0
> No symbol table info available.
> #3  0x00007f789cf5e018 in login_binary_run () from 
> /usr/lib/dovecot/libdovecot-login.so.0
> No symbol table info available.
> #4  0x00007f789c979c8d in __libc_start_main () from /lib/libc.so.6
> No symbol table info available.
> #5  0x0000000000402459 in ?? ()
> No symbol table info available.
> #6  0x00007fff8a9c65f8 in ?? ()
> No symbol table info available.
> #7  0x000000000000001c in ?? ()
> No symbol table info available.
> #8  0x0000000000000002 in ?? ()
> No symbol table info available.
> #9  0x00007fff8a9c7e6a in ?? ()
> No symbol table info available.
> #10 0x00007fff8a9c7e7d in ?? ()
> No symbol table info available.
> #11 0x0000000000000000 in ?? ()
> No symbol table info available.
>
>
>>
>>
>> Joe Auty <mailto:joe at netmusician.org>
>> September 22, 2012 3:57 PM
>> Hello,
>>
>> I'm seeing a lot of these in my /var/log/messages in Debian Squeeze, 
>> I suspect this might be causing performance issues. Any suggestions 
>> what I can try to fix this?
>>
>>
>> I'm using the 2.1.10 packages obtained with the following in my 
>> sources.list:
>>
>> deb http://xi.rename-it.nl/debian/ stable-auto/dovecot-2.1 main
>>
>>
>> I need to use Dovecot 2.1.x because I need to support handling 
>> multiple SSL certs.
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