From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:58826 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755697AbeDKSqJ (ORCPT ); Wed, 11 Apr 2018 14:46:09 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe JAILLET , Aurelien Aptel , Steve French , Sasha Levin Subject: [PATCH 4.4 028/190] SMB2: Fix share type handling Date: Wed, 11 Apr 2018 20:34:34 +0200 Message-Id: <20180411183551.832738836@linuxfoundation.org> In-Reply-To: <20180411183550.114495991@linuxfoundation.org> References: <20180411183550.114495991@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christophe JAILLET [ Upstream commit cd1230070ae1c12fd34cf6a557bfa81bf9311009 ] In fs/cifs/smb2pdu.h, we have: #define SMB2_SHARE_TYPE_DISK 0x01 #define SMB2_SHARE_TYPE_PIPE 0x02 #define SMB2_SHARE_TYPE_PRINT 0x03 Knowing that, with the current code, the SMB2_SHARE_TYPE_PRINT case can never trigger and printer share would be interpreted as disk share. So, test the ShareType value for equality instead. Fixes: faaf946a7d5b ("CIFS: Add tree connect/disconnect capability for SMB2") Signed-off-by: Christophe JAILLET Acked-by: Aurelien Aptel Signed-off-by: Steve French Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/cifs/smb2pdu.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -999,15 +999,19 @@ SMB2_tcon(const unsigned int xid, struct goto tcon_exit; } - if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) + switch (rsp->ShareType) { + case SMB2_SHARE_TYPE_DISK: cifs_dbg(FYI, "connection to disk share\n"); - else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { + break; + case SMB2_SHARE_TYPE_PIPE: tcon->ipc = true; cifs_dbg(FYI, "connection to pipe share\n"); - } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { - tcon->print = true; + break; + case SMB2_SHARE_TYPE_PRINT: + tcon->ipc = true; cifs_dbg(FYI, "connection to printer\n"); - } else { + break; + default: cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); rc = -EOPNOTSUPP; goto tcon_error_exit;