From 95f8d7420218470b918555841d1359139fde3ca2 Mon Sep 17 00:00:00 2001
From: Colton Willey <colton@wolfssl.com>
Date: Tue, 22 Oct 2024 15:59:49 -0700
Subject: [PATCH] Fix loop to decrement

---
 src/x509_str.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/x509_str.c b/src/x509_str.c
index 44e104ba6..012f41d74 100644
--- a/src/x509_str.c
+++ b/src/x509_str.c
@@ -365,13 +365,14 @@ int wolfSSL_X509_verify_cert(WOLFSSL_X509_STORE_CTX* ctx)
                 (wolfSSL_sk_X509_num(certs) > numInterAdd)) {
                 for (i = wolfSSL_sk_X509_num(certs) - 1;
                      i > (numInterAdd > 0 ? numInterAdd - 1 : 0);
-                     i++) {
+                     i--) {
                         tmp = wolfSSL_sk_X509_value(certs, i);
-                        if (wolfSSL_X509_NAME_cmp(
+                        if (tmp != NULL && wolfSSL_X509_NAME_cmp(
                             &issuer->subject, &tmp->subject) == 0) {
                             ret = WOLFSSL_SUCCESS;
                             break;
                         }
+                        tmp = NULL;
                 }
             }
         }