as we upgraded our mailserver with the latest stable vpopmail, we started
experiencing apparently random segfaults:
[3403529.738453] vdelivermail[3818]: segfault at 0 ip f7bfc643 sp fff3f46c
error 4 in libc-2.7.so[f7b8b000+138000]
[3403538.291042] vdelivermail[4203]: segfault at 0 ip f7c60643 sp ffda3b0c
error 4 in libc-2.7.so[f7bef000+138000]
[3403543.645107] vdelivermail[4332]: segfault at 0 ip f7c38643 sp fff7d33c
error 4 in libc-2.7.so[f7bc7000+138000]
[3403547.184431] vdelivermail[4535]: segfault at 0 ip f7c53643 sp ffd96adc
error 4 in libc-2.7.so[f7be2000+138000]

Some mail gets delivered, some delivered, thus vdelivermail doesn't segfault
all the time:
 delivery 21641: deferral:
 delivery 21643: success: did_0+0+1/
But the ratio isn't that good, basically a failure for every successfull
grep "success:" /var/log/mail.log|wc -l


grep "Aack" /var/log/mail.log|wc -l

It seems vpopmail has experienced similar issues in 5.4.28 version earlier,
might this be related?

vpopmail was configured using:
./configure --enable-roaming-users=y --enable-logging=y
--enable-ip-alias-domains=y --enable-auth-module=mysql
--enable-clear-passwd=y --enable-libdir=/usr/include/mysql/
--enable-tcpserver-file=/etc/tcp.smtp --enable-qmail-ext --enable-logging=e
--enable-tcprules-prog=/usr/bin/tcprules --enable-rebuild-tcpserver-file
--enable-clear-passwd=y --enable-spamassassin

and is run under a Xen virtual host (2.6.26-1-xen-amd64).

Any ideas, or do you need more information on the issue?

  Antti Kanes


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