From 6b37a69213a2cda3e41557ecd9cd4d0ded2a9d3f Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Mon, 26 Sep 2022 12:05:33 +1000
Subject: [PATCH] Free 'n' on error path in rsa_check

(cherry picked from commit 483c5a19781b0930c6e72bb2b498130c3f83d13f)
---
 lib/dns/opensslrsa_link.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/dns/opensslrsa_link.c b/lib/dns/opensslrsa_link.c
index c2b62afd34..d01d0b03cb 100644
--- a/lib/dns/opensslrsa_link.c
+++ b/lib/dns/opensslrsa_link.c
@@ -994,6 +994,9 @@ rsa_check(RSA *rsa, RSA *pub) {
 		}
 		if (e1 != NULL) {
 			if (BN_cmp(e1, e2) != 0) {
+				if (n != NULL) {
+					BN_free(n);
+				}
 				return (DST_R_INVALIDPRIVATEKEY);
 			}
 		} else {