Bug#398534: sasl2-bin: Failures also experienced in cyrus21

[Michael Welsh Duggan]

Henrique de Moraes Holschuh <hmh at debian.org> writes:

> On Wed, 15 Nov 2006, Michael Welsh Duggan wrote:
>> Since upgrading, I have experienced similar problems using cyrus21.  In 
>> particular, all of my seen flags seem inaccessible.  Part of mail.log:
>> 
>> Nov 15 18:29:22 maru cyrus/master[29877]: about to exec 
>> /usr/lib/cyrus/bin/imapd
>> Nov 15 18:29:22 maru cyrus/imap[29877]: executed
>> Nov 15 18:29:22 maru cyrus/imapd[29877]: accepted connection
>> Nov 15 18:29:23 maru cyrus/imapd[29877]: login: maru[127.0.0.1] md5i plaintext 
>> Nov 15 18:29:23 maru cyrus/imapd[29877]: DBERROR: skiplist recovery /var/lib/cyrus/user/m/md5i.seen: ADD at 8FD4 exists
>
> A skiplist database is corrupted.  This is not supposed to have *anything*
> to do with sasl, so if you really did get it because of sasl, we have a damn
> big bad bug that corrupts the application's stack/data space/open files.
>
> And since skiplist has nothing to do with berkeley DB, it should not happen
> because there are two versions of berkeley DB linked to cyrus imapd now,
> either...  Still, that's a possibility.
>
> Does downgrading fix the issue?  You may have a corrupted skiplist database
> for other reasons, after all...

Thank you for responding.  It appears you had correct.  I had made a
procedural error when restoring the corrupted databases from backup.
A subsequent proper restore works with the up-to-date sasl libraries
installed.

This corruption occured under the following circumstances:  I was
reading mail using an open imap connection.  While reading mail, the
sasl packages were updated.  After closing and restarting the imap
connection later, the skiplists were corrupted.  I do not know if the
conjunction of these events were coincidence or not.  I think you
should consider, at the very least, whether the cyrus daemon should be
brought down during the installation of new sasl libraries.

-- 
Michael Welsh Duggan
(mwd at cert.org)
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