From e1bc14f91a40410007e0704fb49a41c7052a44aa Mon Sep 17 00:00:00 2001
From: Ludwig Krispenz <lkrispen@redhat.com>
Date: Oct 24 2019 12:26:20 +0000
Subject: Ticket 49850 cont -fix crash in ldbm_non_leaf


        Bug: if the ldif to be imported contains only one entry there are no leaf nodes
                and the call to qsort crashes

        Fix: check that nodes is not NULL

---

diff --git a/ldap/servers/slapd/back-ldbm/ancestorid.c b/ldap/servers/slapd/back-ldbm/ancestorid.c
index 254a3aa..f26ac13 100644
--- a/ldap/servers/slapd/back-ldbm/ancestorid.c
+++ b/ldap/servers/slapd/back-ldbm/ancestorid.c
@@ -114,7 +114,7 @@ ldbm_get_nonleaf_ids(backend *be, DB_TXN *txn, IDList **idl, ImportJob *job)
     if (ret != 0)
         ldbm_nasty("ldbm_get_nonleaf_ids", sourcefile, 13030, ret);
 
-    if (ret == 0) {
+    if (ret == 0 && nodes) {
         /* now sort it */
         import_log_notice(job, SLAPI_LOG_INFO, "ldbm_get_nonleaf_ids",
             "Starting sort of ancestorid non-leaf IDs...");