From: Aram Sargsyan <aram@isc.org>
Date: Tue, 4 Jan 2022 18:49:20 +0000 (+0000)
Subject: Fix a memory leak in dns_dlzcreate()
X-Git-Tag: v9.19.0~146^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4a6c66288ff831a3450e6472605d3ef8d668eac7;p=thirdparty%2Fbind9.git

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.
---

diff --git a/lib/dns/dlz.c b/lib/dns/dlz.c
index 9b28e37f7a9..b2ff6a6b178 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);
 }