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Btrfs: add extra sanity checks on the path names in btrfs_mksubvol 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2012-02-20 22:14:55 -05:00
parent a6b0d5c8db
commit 16780cabb8
1 changed files with 6 additions and 0 deletions
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6
fs/btrfs/ioctl.c
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@ -1333,6 +1333,12 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
goto out; goto out;
} }
if (name[0] == '.' &&
(namelen == 1 || (name[1] == '.' && namelen == 2))) {
ret = -EEXIST;
goto out;
}
if (subvol) { if (subvol) {
ret = btrfs_mksubvol(&file->f_path, name, namelen, ret = btrfs_mksubvol(&file->f_path, name, namelen,
NULL, transid, readonly); NULL, transid, readonly);