From c778032276808efdcc4dbdac94017419aaba57a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Julius=20H=C3=A4rtl?= <jus@bitgrid.net>
Date: Sun, 24 Feb 2019 11:08:04 +0100
Subject: [PATCH] Properly handle null as ownerId if file system access is
 denied by access token
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Signed-off-by: Julius Härtl <jus@bitgrid.net>
---
 lib/private/Files/View.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/private/Files/View.php b/lib/private/Files/View.php
index f12e4609e0..10fbf00e73 100644
--- a/lib/private/Files/View.php
+++ b/lib/private/Files/View.php
@@ -1381,8 +1381,12 @@ class View {
 			if ($mount instanceof MoveableMount && $internalPath === '') {
 				$data['permissions'] |= \OCP\Constants::PERMISSION_DELETE;
 			}
-
-			$owner = $this->getUserObjectForOwner($storage->getOwner($internalPath));
+			$ownerId = $storage->getOwner($internalPath);
+			$owner = null;
+			if ($ownerId !== null) {
+				// ownerId might be null if files are accessed with an access token without file system access
+				$owner = $this->getUserObjectForOwner($ownerId);
+			}
 			$info = new FileInfo($path, $storage, $internalPath, $data, $mount, $owner);
 
 			if ($data and isset($data['fileid'])) {