From edf27a8992e3b91decc47d0075c5eb2b62608333 Mon Sep 17 00:00:00 2001
From: EasyCoderWei <535345385@qq.com>
Date: Wed, 22 Sep 2021 11:16:18 +0800
Subject: [PATCH] Fixbug: fd may be 0 when BIO_get_fd return 0

---
 ssl/statem_ntls/statem_ntls.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/ssl/statem_ntls/statem_ntls.c b/ssl/statem_ntls/statem_ntls.c
index 430bb18df..80bf4d26c 100644
--- a/ssl/statem_ntls/statem_ntls.c
+++ b/ssl/statem_ntls/statem_ntls.c
@@ -264,14 +264,14 @@ int SSL_connection_is_ntls(SSL *s, int is_server)
          * have to get the server version from clientHello
          */
         if (SSL_IS_FIRST_HANDSHAKE(s) && SSL_in_before(s)) {
-            int ret, fd;
+            int ret, fd = -1;
             PACKET pkt;
             unsigned int version, type;
             unsigned char buf[PEEK_HEADER_LENGTH];
 
-            ret = BIO_get_fd(s->rbio, &fd);
+            (void) BIO_get_fd(s->rbio, &fd);
 
-            if (ret <= 0) {
+            if (fd < 0) {
                 /* NTLS only support socket communication */
                 SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CONNECTION_IS_NTLS,
                             ERR_R_INTERNAL_ERROR);