diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-01-05 17:45:14 -0800 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-03-25 17:08:29 -0700 |
| commit | b2cb1106091b74c66d98e164ef3c385413c05c59 (patch) | |
| tree | 46df448051e4e28fdf0df1b181b79b9c56e11f38 | |
| parent | 0d41fde732c5559d6785e3b7c4dde2ef2511895c (diff) | |
xfs: hide private inodes from bulkstat and handle functions
We're about to start adding functionality that uses internal inodes that
are private to XFS. What this means is that userspace should never be
able to access any information about these files, and should not be able
to open these files by handle. Callers are not allowed to link these
files into the directory tree, which should suffice to make these
private inodes actually private.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
| -rw-r--r-- | fs/xfs/xfs_export.c | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_itable.c | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c index 465fd9e048d4..ce8475a11bc0 100644 --- a/fs/xfs/xfs_export.c +++ b/fs/xfs/xfs_export.c @@ -146,7 +146,7 @@ xfs_nfs_get_inode( return ERR_PTR(error); } - if (VFS_I(ip)->i_generation != generation) { + if (VFS_I(ip)->i_generation != generation || IS_PRIVATE(VFS_I(ip))) { xfs_irele(ip); return ERR_PTR(-ESTALE); } diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 3498b97fb06d..7bcc33069fbe 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -83,6 +83,14 @@ xfs_bulkstat_one_int( dic = &ip->i_d; + /* If this is a private inode, don't leak its details to userspace. */ + if (IS_PRIVATE(inode)) { + xfs_iunlock(ip, XFS_ILOCK_SHARED); + xfs_irele(ip); + error = -EINVAL; + goto out_advance; + } + /* xfs_iget returns the following without needing * further change. */ |