From d9a5b045b8384fcdef6200f2cdc293805957fe5e Mon Sep 17 00:00:00 2001
From: Edd Inglis <edd.inglis@gmail.com>
Date: Fri, 11 Mar 2022 22:03:48 +0000
Subject: [PATCH] Catch a possible null-dereference

---
 libraries/ESP8266httpUpdate/src/ESP8266httpUpdate.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libraries/ESP8266httpUpdate/src/ESP8266httpUpdate.cpp b/libraries/ESP8266httpUpdate/src/ESP8266httpUpdate.cpp
index 741c701804..df709bdd2f 100755
--- a/libraries/ESP8266httpUpdate/src/ESP8266httpUpdate.cpp
+++ b/libraries/ESP8266httpUpdate/src/ESP8266httpUpdate.cpp
@@ -254,6 +254,12 @@ HTTPUpdateResult ESP8266HTTPUpdate::handleUpdate(HTTPClient& http, const String&
                 }
 
                 WiFiClient * tcp = http.getStreamPtr();
+                if (!tcp) {
+                    DEBUG_HTTP_UPDATE("[httpUpdate] WiFiClient connection unexpectedly absent\n");
+                    _setLastError(HTTPC_ERROR_CONNECTION_LOST);
+                    http.end();
+                    return HTTP_UPDATE_FAILED;
+                }
 
                 if (_closeConnectionsOnUpdate) {
                     WiFiUDP::stopAll();