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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-03 09:11:31 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-04 18:06:40 -0700 |
| commit | 11715a21bc3035440b853a0334685f1a55ca8c3c (patch) | |
| tree | 36e8e8f19aaa7fc813cb243509c625fd73027621 /fs/xfs | |
| parent | f0ec1b8ef11df0a51954df7e3ff3ca4aadb0d34b (diff) | |
| download | linux-11715a21bc3035440b853a0334685f1a55ca8c3c.tar.gz linux-11715a21bc3035440b853a0334685f1a55ca8c3c.tar.bz2 linux-11715a21bc3035440b853a0334685f1a55ca8c3c.zip | |
xfs: don't allow reflinked dir/dev/fifo/socket/pipe files
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 <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c index bbcc8c7a44b3..7699a033dd3c 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); |