From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9FC522E62CD; Thu, 3 Jul 2025 14:56:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751554597; cv=none; b=BBTPniR6KeCLJzIqtGiJ0Nxa6+Eiy7P9u9Y83YbMKs1LwU/0XZ62ez24CitqWcL30FHUW64kFRrl4Tj6SXjM2KsHSgEA62isFHD/23OXJGVlWerGPltm//NlamXzS5FydKdLhi2zBohXdTpip1/IzpJ1vAVL0ifqL7JMLAhkW+A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751554597; c=relaxed/simple; bh=8bcZQofDo4je4SF5yegmTKN/xYY/dIoAcfoBOBJFHq0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=AzTdcWGsIiDdfm0uDMLCJZVksSPiLgnYYBVEMD+ZYCNKTMO1JveBY3ZOG4qZTOSTPw4uQA8ZkwCdLAyGGy717y5T9+63mzZmUhkSuuzO18qHhpSKi4zSgoJZDlzrtQAVQRY055AEjG0ghbALJhsBzfdeHWRqZESDYo+87bUXK/8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XfmEJs8m; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="XfmEJs8m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0EE29C4CEE3; Thu, 3 Jul 2025 14:56:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751554597; bh=8bcZQofDo4je4SF5yegmTKN/xYY/dIoAcfoBOBJFHq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XfmEJs8mBnRXEyyw2KrKaC/jCDeYGpW8vs6UbNmhNLoSO58IoTUAGJIU7bUm0R4la rzxV9x+hVcENWJOpfB75JEGqx9PVGaiNdPqAWGQqph+lyqrq93oiDFB/aHlJCpZ5Ez pski+BGAmWl069hcqTwGNPkQKo0niVen5aCJpRYA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Pali=20Roh=C3=A1r?= , Steve French , Sasha Levin Subject: [PATCH 6.15 002/263] cifs: Fix cifs_query_path_info() for Windows NT servers Date: Thu, 3 Jul 2025 16:38:42 +0200 Message-ID: <20250703144004.378623862@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250703144004.276210867@linuxfoundation.org> References: <20250703144004.276210867@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pali Rohár [ Upstream commit a3e771afbb3bce91c8296828304903e7348003fe ] For TRANS2 QUERY_PATH_INFO request when the path does not exist, the Windows NT SMB server returns error response STATUS_OBJECT_NAME_NOT_FOUND or ERRDOS/ERRbadfile without the SMBFLG_RESPONSE flag set. Similarly it returns STATUS_DELETE_PENDING when the file is being deleted. And looks like that any error response from TRANS2 QUERY_PATH_INFO does not have SMBFLG_RESPONSE flag set. So relax check in check_smb_hdr() for detecting if the packet is response for this special case. This change fixes stat() operation against Windows NT SMB servers and also all operations which depends on -ENOENT result from stat like creat() or mkdir(). Signed-off-by: Pali Rohár Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/smb/client/misc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/smb/client/misc.c b/fs/smb/client/misc.c index 7b6ed9b23e713..e77017f470845 100644 --- a/fs/smb/client/misc.c +++ b/fs/smb/client/misc.c @@ -326,6 +326,14 @@ check_smb_hdr(struct smb_hdr *smb) if (smb->Command == SMB_COM_LOCKING_ANDX) return 0; + /* + * Windows NT server returns error resposne (e.g. STATUS_DELETE_PENDING + * or STATUS_OBJECT_NAME_NOT_FOUND or ERRDOS/ERRbadfile or any other) + * for some TRANS2 requests without the RESPONSE flag set in header. + */ + if (smb->Command == SMB_COM_TRANSACTION2 && smb->Status.CifsError != 0) + return 0; + cifs_dbg(VFS, "Server sent request, not response. mid=%u\n", get_mid(smb)); return 1; -- 2.39.5