From 303f6da76fbddc31540a129819356a69b7589496 Mon Sep 17 00:00:00 2001
From: Joas Schilling <nickvergessen@gmx.de>
Date: Mon, 4 Aug 2014 17:53:06 +0200
Subject: [PATCH] Check return of fopen() before using it

Fix #9968
---
 lib/private/preview.php | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/private/preview.php b/lib/private/preview.php
index aeb9806904a..cc15ab84fe7 100755
--- a/lib/private/preview.php
+++ b/lib/private/preview.php
@@ -477,12 +477,15 @@ class Preview {
 		$cached = $this->isCached($fileId);
 		if ($cached) {
 			$stream = $this->userView->fopen($cached, 'r');
-			$image = new \OC_Image();
-			$image->loadFromFileHandle($stream);
-			$this->preview = $image->valid() ? $image : null;
+			$this->preview = null;
+			if ($stream) {
+				$image = new \OC_Image();
+				$image->loadFromFileHandle($stream);
+				$this->preview = $image->valid() ? $image : null;
 
-			$this->resizeAndCrop();
-			fclose($stream);
+				$this->resizeAndCrop();
+				fclose($stream);
+			}
 		}
 
 		if (is_null($this->preview)) {
-- 
2.39.5