dovecot - Aug 2005 - Still crashing with test-80

Here is the log over a 12 hour period:

pid 91923 (pop3), uid 25039: exited on signal 6
pid 98265 (pop3), uid 25039: exited on signal 6
pid 95547 (pop3), uid 25039: exited on signal 6
pid 235 (pop3), uid 25039: exited on signal 6
pid 239 (pop3), uid 25039: exited on signal 6
pid 318 (pop3), uid 25039: exited on signal 6
pid 386 (pop3), uid 25039: exited on signal 6
pid 415 (pop3), uid 25039: exited on signal 6
pid 427 (pop3), uid 25039: exited on signal 6
pid 434 (pop3), uid 25039: exited on signal 6
pid 468 (pop3), uid 25039: exited on signal 6
pid 653 (dovecot-auth), uid 0: exited on signal 6 (core dumped)




Here is the GDB Backtrace:

orion# gdb /usr/local/libexec/dovecot/imap dovecot-auth.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain 
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for
details.
This GDB was configured as "i386-marcel-freebsd"...(no debugging
symbols
found)...

warning: core file may not match specified executable file.
Core was generated by `dovecot-auth'.
Program terminated with signal 6, Aborted.
#0  0x181327af in ?? ()
(gdb) bt full
#0  0x181327af in ?? ()
No symbol table info available.
#1  0x18127856 in ?? ()
No symbol table info available.
#2  0x0000028d in ?? ()
No symbol table info available.
#3  0x00000006 in ?? ()
No symbol table info available.
#4  0x00000000 in ?? ()
No symbol table info available.
#5  0x00000000 in ?? ()
No symbol table info available.
#6  0x00000286 in ?? ()
No symbol table info available.
#7  0x181abf4c in ?? ()
No symbol table info available.
#8  0xbfbfea78 in ?? ()
No symbol table info available.
#9  0x1819b0df in ?? ()
No symbol table info available.
#10 0x00000006 in ?? ()
No symbol table info available.
#11 0xbfbfea48 in ?? ()
No symbol table info available.
#12 0x00000000 in ?? ()
No symbol table info available.
#13 0x1819b0aa in ?? ()
No symbol table info available.
#14 0x00000001 in ?? ()
No symbol table info available.
#15 0x18095400 in ?? ()
No symbol table info available.
#16 0xffffffdf in ?? ()
No symbol table info available.
#17 0xffffffff in ?? ()
No symbol table info available.
#18 0xffffffff in ?? ()
No symbol table info available.
#19 0xffffffff in ?? ()
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#20 0x18072a11 in ?? ()
No symbol table info available.
#21 0x18095000 in ?? ()
No symbol table info available.
#22 0x00000150 in ?? ()
No symbol table info available.
#23 0x0807a000 in mail_cache_header_fields_read ()
No symbol table info available.
#24 0x08071000 in istream_raw_mbox_next ()
No symbol table info available.
#25 0x00000000 in ?? ()
No symbol table info available.
#26 0x080710d0 in istream_raw_mbox_seek ()
No symbol table info available.
#27 0x083c1ac0 in ?? ()
No symbol table info available.
#28 0xbfbfea98 in ?? ()
No symbol table info available.
#29 0x0805efd4 in imap_thread ()
No symbol table info available.
Previous frame inner to this frame (corrupt stack?)
(gdb)




Thanks in advance for any help anyone can provide.

-Matt

On 18.8.2005, at 20:23, Matt Juszczak wrote:
> pid 91923 (pop3), uid 25039: exited on signal 6
What about the error message why it dies? Dovecot writes to logs the 
reason why it kills itself when it dies with signal 6.

Debugging these require that you get a core dump to the user's home 
directory (Dovecot logs show what user's process crashed). Setting 
mail_drop_priv_before_exec = yes in config file hopefully does that. 
Then you'll need to get a backtrace from it against pop3 binary.
> pid 653 (dovecot-auth), uid 0: exited on signal 6 (core dumped)
Also dovecot-auth writes the reason why it crashes to log file.
> orion# gdb /usr/local/libexec/dovecot/imap dovecot-auth.core
Sorry, wrong again :) dovecot-auth binary against dovecot-auth.core 
file. pop3 binary against core files created by pop3.

Also your previous backtrace for dovecot-auth was somewhat broken too.. 
Probably because the binaries were stripped. Did you use some binary 
package or compile by hand? Those backtraces would be a lot better if 
the debugging info wasn't stripped away..
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