Bug#553503: exim4: occasional crashes

[Francesco Potortì]

>> Package: exim4
>> Version: 4.69-11
>> Severity: normal
>
>> This is what I observe in my /var/log/kern.log*:
>
>> kern.log.2.gz:323:Oct  4 21:49:19 tucano kernel: [2700039.430582]
>> exim4[25745]: segfault at 7fffc53c8458 ip 000000000041b4aa sp
>> 00007fffc53c8460 error 6 in exim4[400000+ac000]
>
>> kern.log.1.gz:29192:Oct 22 15:55:44 tucano kernel: [ 6575.519329]
>> exim4[20967]: segfault at 7fff95092ef8 ip 000000000041bbec sp
>> 00007fff95092ed0 error 6 in exim4[400000+ac000]
>
>> kern.log:36:Oct 30 11:07:33 tucano kernel: [684083.570430] exim4[2948]:
>> segfault at 7fff7768aa48 ip 000000000041bbec sp 00007fff7768aa20 error 6
>> in exim4[400000+ac000]

>I guess you are not using dovecot auth. (#551106), are you?

No, at lest I never configured exim to use it.  In fact, I only use
exim4 listening on the loopback interface for fetchmail's sake and
sending out mail to a smart host.  I append the simple configuration
below.

>Could you try whether moving away the contents of /var/spool/exim4/db/
>(please do not delete, but keep a copy) fixes the issue?

In the last months, only three times did exim4 crash.  So I am not sure
how to reliably check that anything changes.  I can move
/var/spool/exim4/db/ away and wait for one more moth before reporting.
Would this make sense?

>What do the corrsponding entries in /var/log/exim4/mainlog* look like?

Apparently nothing interesting.  Here are the entries nearest to the
first and last crashes:

2009-10-04 21:49:19 1MuX55-0006hD-GN <= travelogueLuplift at bloomberg.com
H=localhost (tucano.isti.cnr.it) [127.0.0.1] U=pot P=esmtp S=7328
id=005801ca456e$c2ea6220$48bf2660$@com

2009-10-30 11:07:32 1N3oOK-0000lW-UN <= samverms at gator680.hostgator.com
H=localhost (tucano.isti.cnr.it) [127.0.0.1] U=pot P=esmtp S=6606
id=E1N3oNj-00045C-1O at gator680.hostgator.com


===File /etc/exim4/update-exim4.conf.conf===================
dc_eximconfig_configtype='smarthost'
dc_other_hostnames=''
dc_local_interfaces='127.0.0.1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='smtp.isti.cnr.it::587'
CFILEMODE='644'
dc_use_split_config='true'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'
============================================================