From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40252 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751651AbdJaJ6c (ORCPT ); Tue, 31 Oct 2017 05:58:32 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Steve French Subject: [PATCH 4.13 28/43] SMB3: Validate negotiate request must always be signed Date: Tue, 31 Oct 2017 10:55:48 +0100 Message-Id: <20171031095531.633196173@linuxfoundation.org> In-Reply-To: <20171031095530.520746935@linuxfoundation.org> References: <20171031095530.520746935@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Steve French commit 4587eee04e2ac7ac3ac9fa2bc164fb6e548f99cd upstream. According to MS-SMB2 3.2.55 validate_negotiate request must always be signed. Some Windows can fail the request if you send it unsigned See kernel bugzilla bug 197311 Acked-by: Ronnie Sahlberg Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/cifs/smb2pdu.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1963,6 +1963,9 @@ SMB2_ioctl(const unsigned int xid, struc } else iov[0].iov_len = get_rfc1002_length(req) + 4; + /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ + if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) + req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED; rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov); cifs_small_buf_release(req);