int wvlan_set_porttype(struct net_device *dev,
		      struct iw_request_info *info,
		      union iwreq_data *wrqu,
		      char *extra)
{
	struct wl_private *lp = wl_priv(dev);
	unsigned long flags;
	int     ret = 0;
	hcf_16  portType;
	/*------------------------------------------------------------------------*/


	DBG_FUNC("wvlan_set_porttype");
	DBG_ENTER(DbgInfo);

	wl_lock(lp, &flags);

	/* Validate the new value */
	portType = *((__u32 *)extra);

	if (!((portType == 1) || (portType == 3))) {
		ret = -EINVAL;
		goto out_unlock;
	}

	lp->PortType = portType;

	/* Commit the adapter parameters */
	wl_apply(lp);

out_unlock:
	wl_unlock(lp, &flags);

/* out: */
	DBG_LEAVE(DbgInfo);
	return ret;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.