[Dovecot] Imap segfault on login with version 2.0.8 & 2.0.11

[Timo Sirainen]

On 8.4.2011, at 0.17, Nicholas VonHollen wrote:

> Thanks for helping me out.  It looks like no matter what I do, changing the executable line doesn't help.  I even changed it to "executable = /bin/false" and it still reports a segfault.  I verified the config with "dovecot -n", stopped using the "-c /etc/dovecot.conf", moved the conf file to the appropriate place, re-verified it, and I still can't affect it.  I assume the crash is happening post-fork, pre-exec, if there is custom code for launching child processes.  Since strace 'fixes' the problem, I'll try to figure it out under gdb, but to be honest, my C debugging skills are very rusty.

Ah, yes:

> Apr  7 17:29:05 localhost dovecot: master: Error: service(imap): child 9690 killed with signal 11 (core dumps disabled)

It has "master:" prefix so it's pre-exec. But you got a core file earlier, right? You should be able to get a usable gdb backtrace then with "gdb dovecot core".