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-rw-r--r--source4/dsdb/samdb/ldb_modules/linked_attributes.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/linked_attributes.c b/source4/dsdb/samdb/ldb_modules/linked_attributes.c
index a55ec87f0f..eb57f91e6d 100644
--- a/source4/dsdb/samdb/ldb_modules/linked_attributes.c
+++ b/source4/dsdb/samdb/ldb_modules/linked_attributes.c
@@ -4,6 +4,7 @@
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
Copyright (C) Simo Sorce <idra@samba.org> 2008
Copyright (C) Matthieu Patou <mat@matws.net> 2011
+ Copyright (C) Andrew Tridgell 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -729,6 +730,20 @@ static int linked_attributes_fix_links(struct ldb_module *module,
talloc_free(tmp_ctx);
return ret;
}
+ if (res->count == 0) {
+ /* Forward link without backlink object remaining - nothing to do here */
+ continue;
+ }
+ if (res->count != 1) {
+ ldb_asprintf_errstring(ldb, "Linked attribute %s->%s between %s and %s - target GUID %s found more than once!",
+ el->name, target->lDAPDisplayName,
+ ldb_dn_get_linearized(old_dn),
+ ldb_dn_get_linearized(dsdb_dn->dn),
+ GUID_string(tmp_ctx, &link_guid));
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
msg = res->msgs[0];
if (msg->num_elements == 0) {