From patchwork Mon Sep 18 09:12:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 9955989 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DCE11601E9 for ; Mon, 18 Sep 2017 09:20:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CB16D28C4B for ; Mon, 18 Sep 2017 09:20:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BBD6828C68; Mon, 18 Sep 2017 09:20:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1155728BF7 for ; Mon, 18 Sep 2017 09:20:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753151AbdIRJUD (ORCPT ); Mon, 18 Sep 2017 05:20:03 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:56842 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932543AbdIRJRh (ORCPT ); Mon, 18 Sep 2017 05:17:37 -0400 Received: from localhost (LFbn-1-12253-150.w90-92.abo.wanadoo.fr [90.92.67.150]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id B02577AA; Mon, 18 Sep 2017 09:17:36 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , linux-xfs@vger.kernel.org, "Darrick J . Wong" , Christoph Hellwig Subject: [PATCH 4.9 73/78] xfs: disable per-inode DAX flag Date: Mon, 18 Sep 2017 11:12:22 +0200 Message-Id: <20170918091137.531531480@linuxfoundation.org> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170918091126.077483037@linuxfoundation.org> References: <20170918091126.077483037@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christoph Hellwig commit 742d84290739ae908f1b61b7d17ea382c8c0073a upstream. Currently flag switching can be used to easily crash the kernel. Disable the per-inode DAX flag until that is sorted out. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong Signed-off-by: Greg Kroah-Hartman --- fs/xfs/xfs_ioctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -1005,11 +1005,12 @@ xfs_diflags_to_linux( inode->i_flags |= S_NOATIME; else inode->i_flags &= ~S_NOATIME; +#if 0 /* disabled until the flag switching races are sorted out */ if (xflags & FS_XFLAG_DAX) inode->i_flags |= S_DAX; else inode->i_flags &= ~S_DAX; - +#endif } static int