Merge pull request #53681 from nextcloud/backport/53677/stable31

[stable31] fix(dav): catch exception on non local account

Author: AndyScherzinger

apps/dav/lib/Connector/Sabre/FilesPlugin.php

@@ -9,6 +9,7 @@
 
 use OC\AppFramework\Http\Request;
 use OC\FilesMetadata\Model\FilesMetadata;
+use OC\User\NoUserException;
 use OCA\DAV\Connector\Sabre\Exception\InvalidPath;
 use OCP\Accounts\IAccountManager;
 use OCP\Constants;
@@ -373,7 +374,13 @@ public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node)
 				}
 
 				// Check if the user published their display name
-				$ownerAccount = $this->accountManager->getAccount($owner);
+				try {
+					$ownerAccount = $this->accountManager->getAccount($owner);
+				} catch (NoUserException) {
+					// do not lock process if owner is not local
+					return null;
+				}
+
 				$ownerNameProperty = $ownerAccount->getProperty(IAccountManager::PROPERTY_DISPLAYNAME);
 
 				// Since we are not logged in, we need to have at least the published scope