dovecot - Apr 2011 - Imap segfault on login with version 2.0.8 & 2.0.11

Hi everyone,

I'm trying to upgrade/test our configuration files from Dovecot 1.2 to
2.0.11. ?I used the Dovecot config convert command, created a RHEL 5 x86_64 rpm,
and tested it. ?I can connect, but once I login, the IMAP service segfaults.
?I've also reproduced this on version 2.0.8.

I installed the debug RPM (for the stripped symbols), took a look at the core
dump in gdb, and just got the _start method in ld_preload and a broken pointer
in the backtrace. ?I tried to strace everything but the segfault doesn't
happen then :-). ?I'm not sure what to do to get better information.

I attached my client session, dovecot -n output, gdb trace, maillog, and the
core dump.

I published the RPMs I made at:
http://c3205012.r12.cf0.rackcdn.com/dovecot-2.0.11-1_125.x86_64.rpm
http://c3205012.r12.cf0.rackcdn.com/dovecot-debuginfo-2.0.11-1_125.x86_64.rpm

My platform is RHEL 5 with kernel 2.6.18 on x86_64.

Is there anything else I can provide for more info?

Thanks,
Nick


Nick VonHollen
Rackspace Software Developer
Desk: 540-443-2003 (internal 505-2003)
Personal Cell: 757-710-7038
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On Wed, 2011-04-06 at 18:53 -0400, Nicholas VonHollen wrote:
> I'm trying to upgrade/test our configuration files from Dovecot 1.2 to
> 2.0.11.  I used the Dovecot config convert command, created a RHEL 5
> x86_64 rpm, and tested it.  I can connect, but once I login, the IMAP
> service segfaults.  I've also reproduced this on version 2.0.8.
Try what happens when running imap directly:

/usr/lib/dovecot/imap -u user at domain

Does it still crash? If not, you could try if running it via valgrind
logs anything useful:

service imap {
  executable = /usr/bin/valgrind /usr/lib/dovecot/imap
}