[PATCH] Fix a Coverity finding

[Volker Lendecke]

Hi!

Review appreciated!

Thanks, Volker

-- 
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From e5c6482605aae076cbc26a725ce508ce0dcbb90e Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl at samba.org>
Date: Tue, 8 May 2018 08:35:18 +0200
Subject: [PATCH] dsdb: Fix CID 1435453 Null pointer dereferences

Signed-off-by: Volker Lendecke <vl at samba.org>
---
 source4/dsdb/samdb/ldb_modules/schema_load.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source4/dsdb/samdb/ldb_modules/schema_load.c b/source4/dsdb/samdb/ldb_modules/schema_load.c
index fd19d105162..6a3001d05e4 100644
--- a/source4/dsdb/samdb/ldb_modules/schema_load.c
+++ b/source4/dsdb/samdb/ldb_modules/schema_load.c
@@ -82,6 +82,10 @@ static int schema_metadata_open(struct ldb_module *module)
 	filename = ldb_relative_path(ldb,
 				     tmp_ctx,
 				     "sam.ldb.d/metadata.tdb");
+	if (filename == NULL) {
+		talloc_free(tmp_ctx);
+		return ldb_module_oom(module);
+	}
 
 	open_flags = O_RDWR;
 	if (stat(filename, &statbuf) != 0) {
-- 
2.11.0