From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:48794 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932928AbcI3DIr (ORCPT ); Thu, 29 Sep 2016 23:08:47 -0400 Subject: [PATCH 28/63] xfs: don't allow reflinked dir/dev/fifo/socket/pipe files From: "Darrick J. Wong" To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Date: Thu, 29 Sep 2016 20:08:42 -0700 Message-ID: <147520492235.29434.5736614103531299436.stgit@birch.djwong.org> In-Reply-To: <147520472904.29434.15518629624221621056.stgit@birch.djwong.org> References: <147520472904.29434.15518629624221621056.stgit@birch.djwong.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Only non-rt files can be reflinked, so check that when we load an inode. Also, don't leak the attr fork if there's a failure. Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_inode_fork.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c index bbcc8c7..7699a03 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.c +++ b/fs/xfs/libxfs/xfs_inode_fork.c @@ -121,6 +121,26 @@ xfs_iformat_fork( return -EFSCORRUPTED; } + if (unlikely(xfs_is_reflink_inode(ip) && + (VFS_I(ip)->i_mode & S_IFMT) != S_IFREG)) { + xfs_warn(ip->i_mount, + "corrupt dinode %llu, wrong file type for reflink.", + ip->i_ino); + XFS_CORRUPTION_ERROR("xfs_iformat(reflink)", + XFS_ERRLEVEL_LOW, ip->i_mount, dip); + return -EFSCORRUPTED; + } + + if (unlikely(xfs_is_reflink_inode(ip) && + (ip->i_d.di_flags & XFS_DIFLAG_REALTIME))) { + xfs_warn(ip->i_mount, + "corrupt dinode %llu, has reflink+realtime flag set.", + ip->i_ino); + XFS_CORRUPTION_ERROR("xfs_iformat(reflink)", + XFS_ERRLEVEL_LOW, ip->i_mount, dip); + return -EFSCORRUPTED; + } + switch (VFS_I(ip)->i_mode & S_IFMT) { case S_IFIFO: case S_IFCHR: @@ -208,7 +228,8 @@ xfs_iformat_fork( XFS_CORRUPTION_ERROR("xfs_iformat(8)", XFS_ERRLEVEL_LOW, ip->i_mount, dip); - return -EFSCORRUPTED; + error = -EFSCORRUPTED; + break; } error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size);