Fix CVE-2017-9287:

https://www.openldap.org/its/?findid=8655
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9287

Patch copied from upstream source repository:

https://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commit;h=0cee1ffb6021b1aae3fcc9581699da1c85a6dd6e

From 0cee1ffb6021b1aae3fcc9581699da1c85a6dd6e Mon Sep 17 00:00:00 2001
From: Ryan Tandy <ryan@nardis.ca>
Date: Wed, 17 May 2017 20:07:39 -0700
Subject: [PATCH] ITS#8655 fix double free on paged search with pagesize 0

Fixes a double free when a search includes the Paged Results control
with a page size of 0 and the search base matches the filter.
---
 servers/slapd/back-mdb/search.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/servers/slapd/back-mdb/search.c b/servers/slapd/back-mdb/search.c
index 301d1a498c..43442aa242 100644
--- a/servers/slapd/back-mdb/search.c
+++ b/servers/slapd/back-mdb/search.c
@@ -1066,7 +1066,8 @@ notfound:
 			/* check size limit */
 			if ( get_pagedresults(op) > SLAP_CONTROL_IGNORED ) {
 				if ( rs->sr_nentries >= ((PagedResultsState *)op->o_pagedresults_state)->ps_size ) {
-					mdb_entry_return( op, e );
+					if (e != base)
+						mdb_entry_return( op, e );
 					e = NULL;
 					send_paged_response( op, rs, &lastid, tentries );
 					goto done;
-- 
2.13.0

json'>log</a><a href='/guix/tree/gnu/packages/aux-files/chromium/master-preferences.json?id=072cc8d1415a2abf66b36249c61658a828dead88'>tree</a><a href='/guix/commit/gnu/packages/aux-files/chromium/master-preferences.json?id=072cc8d1415a2abf66b36249c61658a828dead88'>commit</a><a href='/guix/diff/gnu/packages/aux-files/chromium/master-preferences.json?id=072cc8d1415a2abf66b36249c61658a828dead88'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/aux-files/chromium/master-preferences.json'>
<input type='hidden' name='id' value='072cc8d1415a2abf66b36249c61658a828dead88'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=072cc8d1415a2abf66b36249c61658a828dead88'>root</a>/<a href='/guix/log/gnu?id=072cc8d1415a2abf66b36249c61658a828dead88'>gnu</a>/<a href='/guix/log/gnu/packages?id=072cc8d1415a2abf66b36249c61658a828dead88'>packages</a>/<a href='/guix/log/gnu/packages/aux-files?id=072cc8d1415a2abf66b36249c61658a828dead88'>aux-files</a>/<a href='/guix/log/gnu/packages/aux-files/chromium?id=072cc8d1415a2abf66b36249c61658a828dead88'>chromium</a>/<a href='/guix/log/gnu/packages/aux-files/chromium/master-preferences.json?id=072cc8d1415a2abf66b36249c61658a828dead88'>master-preferences.json</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/aux-files/chromium/master-preferences.json?id=072cc8d1415a2abf66b36249c61658a828dead88&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>