Commit 11715a21 authored by Darrick J. Wong's avatar Darrick J. Wong

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: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent f0ec1b8e
...@@ -121,6 +121,26 @@ xfs_iformat_fork( ...@@ -121,6 +121,26 @@ xfs_iformat_fork(
return -EFSCORRUPTED; 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) { switch (VFS_I(ip)->i_mode & S_IFMT) {
case S_IFIFO: case S_IFIFO:
case S_IFCHR: case S_IFCHR:
...@@ -208,7 +228,8 @@ xfs_iformat_fork( ...@@ -208,7 +228,8 @@ xfs_iformat_fork(
XFS_CORRUPTION_ERROR("xfs_iformat(8)", XFS_CORRUPTION_ERROR("xfs_iformat(8)",
XFS_ERRLEVEL_LOW, XFS_ERRLEVEL_LOW,
ip->i_mount, dip); ip->i_mount, dip);
return -EFSCORRUPTED; error = -EFSCORRUPTED;
break;
} }
error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size); error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment