[Bug 414359] Re: Dovecot-imapd, PAM auth., krb auth with non-krb user causes crash

[A. Karl Kornel]

Hi Chuck,

I have done backtraces before, but this one was a little more unusual
for me.  The last time I needed a backtrace, I was able to capture the
daemon's full command line, then run it through GDB.  In this case, I'm
thinking the offending program is located at /usr/lib/dovecot/dovecot-
auth, it is run by the dovecot daemon as needed, and then exits with a
result (or, in this case, a crash) shortly after starting.

In this case, I stopped dovecot, sudo-ed into root, ran `ulimit -c
unlimited`, ran dovecot manually, and had my IMAP client try a login.
That caused dovecot-auth to die again (as expected), and dropped a core
file in /var/run/dovecot.  I installed both dovecot-common-dbgsym and
libpam0g-dbgsym packages, ran `gdb /usr/lib/dovecot/dovecot-auth core`,
and then ran the 5 GDB commands requested in
https://wiki.ubuntu.com/Backtrace.  Attached are the results!

** Attachment added: "gdb-dovecot.txt"
   http://launchpadlibrarian.net/32407551/gdb-dovecot.txt

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Dovecot-imapd, PAM auth., krb auth with non-krb user causes crash
https://bugs.launchpad.net/bugs/414359
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