static int path_parent_directory(struct path *path)
{
	struct dentry *old = path->dentry;
	/* rare case of legitimate dget_parent()... */
	path->dentry = dget_parent(path->dentry);
	dput(old);
	if (unlikely(!path_connected(path)))
		return -ENOENT;
	return 0;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.