From c02fff5aecd4d002143a0e901f3dde3d14934a18 Mon Sep 17 00:00:00 2001
From: Dmitry Belyavskiy <beldmit@gmail.com>
Date: Mon, 7 Mar 2022 17:05:57 +0100
Subject: [PATCH] Avoid potential memory leak

Resolves #17827

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17828)

(cherry picked from commit 175355923046921a689b500f7a72455f7095708f)
---
 crypto/x509v3/v3_utl.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/crypto/x509v3/v3_utl.c b/crypto/x509v3/v3_utl.c
index 40d8f315549..83a4bc8a06b 100644
--- a/crypto/x509v3/v3_utl.c
+++ b/crypto/x509v3/v3_utl.c
@@ -538,8 +538,11 @@ static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email
         return 0;
 
     emtmp = OPENSSL_strndup((char *)email->data, email->length);
-    if (emtmp == NULL)
+    if (emtmp == NULL) {
+        X509_email_free(*sk);
+        *sk = NULL;
         return 0;
+    }
 
     /* Don't add duplicates */
     if (sk_OPENSSL_STRING_find(*sk, emtmp) != -1) {
-- 
2.47.3