From 52b3eb0f5524300f2a98699ffb8803c46854ae69 Mon Sep 17 00:00:00 2001
From: Ludwig Krispenz <lkrispen@redhat.com>
Date: Oct 24 2019 12:07:45 +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/db-bdb/bdb_import.c b/ldap/servers/slapd/back-ldbm/db-bdb/bdb_import.c
index 79c9c7c..67ff3e3 100644
--- a/ldap/servers/slapd/back-ldbm/db-bdb/bdb_import.c
+++ b/ldap/servers/slapd/back-ldbm/db-bdb/bdb_import.c
@@ -489,7 +489,7 @@ bdb_get_nonleaf_ids(backend *be, DB_TXN *txn, IDList **idl, ImportJob *job)
     if (ret != 0)
         ldbm_nasty("bdb_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...");