From 2439b7ca1263811c03fb0ed82d0c012eb9171585 Mon Sep 17 00:00:00 2001
From: Adrian <adrian.dev@kousz.ch>
Date: Sun, 3 Jan 2021 23:29:46 +0100
Subject: [PATCH] Handle special path names

---
 lib/private/Files/Storage/Local.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/private/Files/Storage/Local.php b/lib/private/Files/Storage/Local.php
index 208ac00b5b..66aa0f16c2 100644
--- a/lib/private/Files/Storage/Local.php
+++ b/lib/private/Files/Storage/Local.php
@@ -465,7 +465,7 @@ class Local extends \OC\Files\Storage\Common {
 		if ($realPath) {
 			$realPath = $realPath . '/';
 		}
-		if ($fileExists && substr($fullPath, 0, strlen($realPath)) === $realPath) {
+		if ($fileExists && rtrim($fullPath, '/.') === $fullPath && substr($fullPath, 0, strlen($realPath)) === $realPath) {
 			\OCP\Util::writeLog('core', "Cyclic symlinks are not allowed ('$fullPath' -> '$realPath')", ILogger::ERROR);
 		} elseif (substr($realPath, 0, $this->dataDirLength) === $this->realDataDir) {
 			return $fullPath;