From: Andy Green <andy@warmcat.com>
Date: Wed, 4 Jan 2017 06:38:39 +0000 (+0800)
Subject: client: protect against possible NULL deref path
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fheads%2Ftizen_3.0;p=platform%2Fupstream%2Flibwebsockets.git

client: protect against possible NULL deref path

Change-Id: I1a2e3f05bc3b79e65bd32e9ba3fa0603a22f47c7
---

diff --git a/lib/libwebsockets.c b/lib/libwebsockets.c
index 5ab49a12..dc4aa5f4 100755
--- a/lib/libwebsockets.c
+++ b/lib/libwebsockets.c
@@ -408,7 +408,9 @@ just_kill_connection:
 		char* errorString;
 
 		lwsl_debug("Connection closed before server reply\n");
-		errorString = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP);
+		errorString = NULL;
+		if (wsi->u.hdr.ah)
+			errorString = lws_hdr_simple_ptr(wsi, WSI_TOKEN_HTTP);
 		if (errorString) {
 			context->protocols[0].callback(wsi,
 					LWS_CALLBACK_CLIENT_CONNECTION_ERROR,