fs: fix a struct path leak in path_umount

}

#endif

int path_umount(struct path *path, int flags)

static int can_umount(const struct path *path, int flags)

{

	struct mount *mnt;

	int retval;

	struct mount *mnt = real_mount(path->mnt);

	if (flags & ~(MNT_FORCE | MNT_DETACH | MNT_EXPIRE | UMOUNT_NOFOLLOW))

		return -EINVAL;

	if (!may_mount())

		return -EPERM;

	mnt = real_mount(path->mnt);

	retval = -EINVAL;

	if (path->dentry != path->mnt->mnt_root)

		goto dput_and_out;

		return -EINVAL;

	if (!check_mnt(mnt))

		goto dput_and_out;

		return -EINVAL;

	if (mnt->mnt.mnt_flags & MNT_LOCKED) /* Check optimistically */

		goto dput_and_out;

	retval = -EPERM;

		return -EINVAL;

	if (flags & MNT_FORCE && !capable(CAP_SYS_ADMIN))

		goto dput_and_out;

		return -EPERM;

	return 0;

}

int path_umount(struct path *path, int flags)

{

	struct mount *mnt = real_mount(path->mnt);

	int ret;

	ret = can_umount(path, flags);

	if (!ret)

		ret = do_umount(mnt, flags);

	retval = do_umount(mnt, flags);

dput_and_out:

	/* we mustn't call path_put() as that would clear mnt_expiry_mark */

	dput(path->dentry);

	mntput_no_expire(mnt);

	return retval;

	return ret;

}

static int ksys_umount(char __user *name, int flags)