From 4a6c66288ff831a3450e6472605d3ef8d668eac7 Mon Sep 17 00:00:00 2001
From: Aram Sargsyan <aram@isc.org>
Date: Tue, 4 Jan 2022 18:49:20 +0000
Subject: [PATCH] Fix a memory leak in dns_dlzcreate()

dns_dlzcreate() fails to free the memory allocated for dlzname
when an error occurs.

Free dlzname's memory (acquired earlier with isc_mem_strdup())
by calling isc_mem_free() before returning an error code.
---
 lib/dns/dlz.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/dns/dlz.c b/lib/dns/dlz.c
index 9b28e37f7a..b2ff6a6b17 100644
--- a/lib/dns/dlz.c
+++ b/lib/dns/dlz.c
@@ -230,6 +230,7 @@ dns_dlzcreate(isc_mem_t *mctx, const char *dlzname, const char *drivername,
 
 	/* impinfo->methods->create failed. */
 	RWUNLOCK(&dlz_implock, isc_rwlocktype_read);
+	isc_mem_free(mctx, db->dlzname);
 	isc_mem_put(mctx, db, sizeof(dns_dlzdb_t));
 	return (result);
 }