From 5e2d6ea0292392164d3023506e55eaa6347773df Mon Sep 17 00:00:00 2001
From: David Fort <contact@hardening-consulting.com>
Date: Fri, 22 Dec 2017 17:55:48 +0100
Subject: [PATCH] zgfx: add a check

---
 libfreerdp/codec/zgfx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libfreerdp/codec/zgfx.c b/libfreerdp/codec/zgfx.c
index 087655b1c..08f055cf7 100644
--- a/libfreerdp/codec/zgfx.c
+++ b/libfreerdp/codec/zgfx.c
@@ -317,7 +317,10 @@ int zgfx_decompress(ZGFX_CONTEXT* zgfx, const BYTE* pSrcData, UINT32 SrcSize, BY
 {
 	int status = -1;
 	BYTE descriptor;
+
 	wStream* stream = Stream_New((BYTE*)pSrcData, SrcSize);
+	if (!stream)
+		return -1;
 
 	if (Stream_GetRemainingLength(stream) < 1)
 		goto fail;