From 879f788bb9ba68a99296b475801c2223eeab087d Mon Sep 17 00:00:00 2001
From: Stefan Eissing <stefan@eissing.org>
Date: Mon, 24 Oct 2022 10:27:16 +0200
Subject: [PATCH] Setting ssl->alpn_peer_requested_length to 0 when freeing
 ssl->alpn_peer_requested.

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

diff --git a/src/tls.c b/src/tls.c
index 9bfc7dbdb..a5eecd526 100644
--- a/src/tls.c
+++ b/src/tls.c
@@ -1710,9 +1710,10 @@ static int TLSX_ALPN_ParseAndSet(WOLFSSL *ssl, const byte *input, word16 length,
     if (isRequest) {
         /* keep the list sent by peer, if this is from a request. We
          * use it later in ALPN_Select() for evaluation. */
-        if (ssl->alpn_peer_requested != NULL)
+        if (ssl->alpn_peer_requested != NULL) {
             XFREE(ssl->alpn_peer_requested, ssl->heap, DYNAMIC_TYPE_ALPN);
-
+            ssl->alpn_peer_requested_length = 0;
+        }
         ssl->alpn_peer_requested = (byte *)XMALLOC(size, ssl->heap,
                                                    DYNAMIC_TYPE_ALPN);
         if (ssl->alpn_peer_requested == NULL) {