proc_map_files_get_link(struct dentry *dentry,
			struct inode *inode,
		        struct delayed_call *done)
{
	if (!capable(CAP_SYS_ADMIN))
		return ERR_PTR(-EPERM);

	return proc_pid_get_link(dentry, inode, done);
}

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.