From: Armin Novak <armin.novak@thincast.com>
Date: Wed, 17 May 2017 13:58:32 +0000 (+0200)
Subject: Fixed missing argument checks.
X-Git-Tag: 2.0.0-rc0~30^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6649eed659ebe2bddb2d9dd1aa2027141bb888b5;p=platform%2Fupstream%2Ffreerdp.git

Fixed missing argument checks.
---

diff --git a/libfreerdp/cache/offscreen.c b/libfreerdp/cache/offscreen.c
index dacc1d9..1b7c2b0 100644
--- a/libfreerdp/cache/offscreen.c
+++ b/libfreerdp/cache/offscreen.c
@@ -44,7 +44,12 @@ static BOOL update_gdi_create_offscreen_bitmap(rdpContext* context,
 	UINT32 i;
 	UINT16 index;
 	rdpBitmap* bitmap;
-	rdpCache* cache = context->cache;
+	rdpCache* cache;
+
+	if (!context || !createOffscreenBitmap || !context->cache)
+		return FALSE;
+
+	cache = context->cache;
 	bitmap = Bitmap_Alloc(context);
 
 	if (!bitmap)
@@ -77,8 +82,16 @@ static BOOL update_gdi_create_offscreen_bitmap(rdpContext* context,
 static BOOL update_gdi_switch_surface(rdpContext* context,
                                       const SWITCH_SURFACE_ORDER* switchSurface)
 {
-	rdpCache* cache = context->cache;
-	rdpBitmap* bitmap = context->graphics->Bitmap_Prototype;
+	rdpCache* cache;
+	rdpBitmap* bitmap;
+
+	if (!context || !context->cache || !switchSurface || !context->graphics)
+		return FALSE;
+
+	cache = context->cache;
+	bitmap = context->graphics->Bitmap_Prototype;
+	if (!bitmap)
+		return FALSE;
 
 	if (switchSurface->bitmapId == SCREEN_BITMAP_SURFACE)
 	{