From f7e66d49fc4e374071d60109337f47d2d102b53a Mon Sep 17 00:00:00 2001
From: Individual IT Services <info@individual-it.net>
Date: Mon, 14 Sep 2015 10:42:00 +0545
Subject: [PATCH] allow ".." in folder names

".." are valid in folder names, only ".." by itself is invalid
fix for #18987
---
 apps/files/ajax/upload.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/files/ajax/upload.php b/apps/files/ajax/upload.php
index 4bc2ce8bdf..7ff02d8db8 100644
--- a/apps/files/ajax/upload.php
+++ b/apps/files/ajax/upload.php
@@ -148,7 +148,7 @@ if ($maxUploadFileSize >= 0 and $totalSize > $maxUploadFileSize) {
 }
 
 $result = array();
-if (strpos($dir, '..') === false) {
+if (\OC\Files\Filesystem::isValidPath($dir) === true) {
 	$fileCount = count($files['name']);
 	for ($i = 0; $i < $fileCount; $i++) {