From patchwork Tue Feb 25 23:10:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "hch@lst.de" X-Patchwork-Id: 11404915 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4E30B18E8 for ; Tue, 25 Feb 2020 23:10:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2D7EB222C2 for ; Tue, 25 Feb 2020 23:10:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="eTV6nLwH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729453AbgBYXK1 (ORCPT ); Tue, 25 Feb 2020 18:10:27 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:53394 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729458AbgBYXK1 (ORCPT ); Tue, 25 Feb 2020 18:10:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=UA8DE4OLKOVvsSlS/t5RFbdB8Hwbjk5JQWfur4LKtPE=; b=eTV6nLwHn/Zk22q4kFMWg+4C9b dUWWjQ+7Wi9qfxITbWacwM1jHMimDalf9++PsPwuFuqptZwMlvOkr+JKsLigf5D7wcMKdus1F5Af7 oXC8vac71mx4MvNdzH/Q9YXhY1Z8DW5AxMIjXeTc7Dabp7XmUnCBmsVf6aVfHAOjUu6V/y03GWKyJ +wL/rhhU4o2ZhNTyKWc8X3ynlEmBOr86xKtFnMJ/QETTRG8EjtogHt3IopcV6+xSIrfnXVUgv7HxZ 7zhMBkD26dqNo54DksVSdHsdUTqZKup0LgqUnfy7QkBj4YcYPZHy4IwRN6//3r0iR+OGu/NBpzNRT TO24+lww==; Received: from [4.28.11.157] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1j6jLO-0003An-SP; Tue, 25 Feb 2020 23:10:26 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Cc: Dave Chinner , Chandan Rajendra , "Darrick J . Wong" Subject: [PATCH 22/30] xfs: lift common checks into xfs_ioc_attr_list Date: Tue, 25 Feb 2020 15:10:04 -0800 Message-Id: <20200225231012.735245-23-hch@lst.de> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200225231012.735245-1-hch@lst.de> References: <20200225231012.735245-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Lift the flags and bufsize checks from both callers into the common code in xfs_ioc_attr_list. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Reviewed-by: Chandan Rajendra Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_ioctl.c | 23 ++++++++++++----------- fs/xfs/xfs_ioctl32.c | 11 ----------- 2 files changed, 12 insertions(+), 22 deletions(-) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index a8fe9553b432..508326f6ec67 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -361,6 +361,18 @@ xfs_ioc_attr_list( struct xfs_attrlist *alist; int error; + if (bufsize < sizeof(struct xfs_attrlist) || + bufsize > XFS_XATTR_LIST_MAX) + return -EINVAL; + + /* + * Reject flags, only allow namespaces. + */ + if (flags & ~(ATTR_ROOT | ATTR_SECURE)) + return -EINVAL; + if (flags == (ATTR_ROOT | ATTR_SECURE)) + return -EINVAL; + /* * Validate the cursor. */ @@ -415,17 +427,6 @@ xfs_attrlist_by_handle( return -EPERM; if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) return -EFAULT; - if (al_hreq.buflen < sizeof(struct xfs_attrlist) || - al_hreq.buflen > XFS_XATTR_LIST_MAX) - return -EINVAL; - - /* - * Reject flags, only allow namespaces. - */ - if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) - return -EINVAL; - if (al_hreq.flags == (ATTR_ROOT | ATTR_SECURE)) - return -EINVAL; dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); if (IS_ERR(dentry)) diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c index 10ea0222954c..840d17951407 100644 --- a/fs/xfs/xfs_ioctl32.c +++ b/fs/xfs/xfs_ioctl32.c @@ -366,17 +366,6 @@ xfs_compat_attrlist_by_handle( if (copy_from_user(&al_hreq, arg, sizeof(compat_xfs_fsop_attrlist_handlereq_t))) return -EFAULT; - if (al_hreq.buflen < sizeof(struct xfs_attrlist) || - al_hreq.buflen > XFS_XATTR_LIST_MAX) - return -EINVAL; - - /* - * Reject flags, only allow namespaces. - */ - if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) - return -EINVAL; - if (al_hreq.flags == (ATTR_ROOT | ATTR_SECURE)) - return -EINVAL; dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq); if (IS_ERR(dentry))