diff options
| author | Chris Mason <chris.mason@oracle.com> | 2012-02-20 22:14:55 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2012-02-23 10:43:45 -0500 |
| commit | 16780cabb877dbd0c8c5e9ff9bdebd6c5bdd1a7b (patch) | |
| tree | d244896098a1e8dfd23403a335315a4b822c95d3 | |
| parent | a6b0d5c8dbfd428717fc4db4c36757783f391c7b (diff) | |
Btrfs: add extra sanity checks on the path names in btrfs_mksubvol
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/ioctl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index e9bdb8b783e..05446f77f99 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1333,6 +1333,12 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file, goto out; } + if (name[0] == '.' && + (namelen == 1 || (name[1] == '.' && namelen == 2))) { + ret = -EEXIST; + goto out; + } + if (subvol) { ret = btrfs_mksubvol(&file->f_path, name, namelen, NULL, transid, readonly); |