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Re: (ITS#7723) slapd crashes on multi core machines if a search request is *immediately* followed by an unbind
- To: openldap-its@OpenLDAP.org
- Subject: Re: (ITS#7723) slapd crashes on multi core machines if a search request is *immediately* followed by an unbind
- From: firstname.lastname@example.org
- Date: Tue, 15 Oct 2013 12:03:50 GMT
- Auto-submitted: auto-generated (OpenLDAP-ITS)
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> It is not the client loop that is multithreading but the ldap server.
Thanks for clarifying.
> And it is not a misuse of the API but a problem that may be raised by day t=
> o day network problems.
> I've boiled down the problem to a few simple configurations that work (or b=
> etter, fail ;-) with both 2.4.23 and 2.4.36. A tgz file containing a setup =
> with start script and testclient is attached. It should be sufficient to re=
> produce the fault.
> The problem occurs only if we use session variable substitution in the rwm =
> overlay, and only if a search is *immediately* (e.g. caused by network loss=
> and client timeout) followed by an unbind.
Yes, your test config shows that the problem is that rwm_conn_destroy frees
the session context while rwm_op_search is using it. Seems like the rwm
overlay is not doing reference counting properly.
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/