From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4AB43C07E95 for ; Fri, 16 Jul 2021 06:19:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D0D861004 for ; Fri, 16 Jul 2021 06:19:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234686AbhGPGWr (ORCPT ); Fri, 16 Jul 2021 02:22:47 -0400 Received: from out30-44.freemail.mail.aliyun.com ([115.124.30.44]:35080 "EHLO out30-44.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234429AbhGPGWr (ORCPT ); Fri, 16 Jul 2021 02:22:47 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=3;SR=0;TI=SMTPD_---0UfwkYU._1626416391; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UfwkYU._1626416391) by smtp.aliyun-inc.com(127.0.0.1); Fri, 16 Jul 2021 14:19:51 +0800 From: Jeffle Xu To: viro@zeniv.linux.org.uk Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH] vfs: only allow SETFLAGS to set DAX flag on files and dirs Date: Fri, 16 Jul 2021 14:19:51 +0800 Message-Id: <20210716061951.81529-1-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org This is similar to commit dbc77f31e58b ("vfs: only allow FSSETXATTR to set DAX flag on files and dirs"). Though the underlying filesystems may have filtered invalid flags, e.g., ext4_mask_flags() called in ext4_fileattr_set(), also check it in VFS layer. Signed-off-by: Jeffle Xu --- fs/ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ioctl.c b/fs/ioctl.c index 1e2204fa9963..1fe73e148e2d 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -835,7 +835,7 @@ static int fileattr_set_prepare(struct inode *inode, * It is only valid to set the DAX flag on regular files and * directories on filesystems. */ - if ((fa->fsx_xflags & FS_XFLAG_DAX) && + if ((fa->fsx_xflags & FS_XFLAG_DAX || fa->flags & FS_DAX_FL) && !(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) return -EINVAL; -- 2.27.0