static s32 brcmf_notify_vif_event(struct brcmf_if *ifp,
				  const struct brcmf_event_msg *e, void *data)
{
	struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
	struct brcmf_if_event *ifevent = (struct brcmf_if_event *)data;
	struct brcmf_cfg80211_vif_event *event = &cfg->vif_event;
	struct brcmf_cfg80211_vif *vif;

	brcmf_dbg(TRACE, "Enter: action %u flags %u ifidx %u bsscfgidx %u\n",
		  ifevent->action, ifevent->flags, ifevent->ifidx,
		  ifevent->bsscfgidx);

	spin_lock(&event->vif_event_lock);
	event->action = ifevent->action;
	vif = event->vif;

	switch (ifevent->action) {
	case BRCMF_E_IF_ADD:
		/* waiting process may have timed out */
		if (!cfg->vif_event.vif) {
			spin_unlock(&event->vif_event_lock);
			return -EBADF;
		}

		ifp->vif = vif;
		vif->ifp = ifp;
		if (ifp->ndev) {
			vif->wdev.netdev = ifp->ndev;
			ifp->ndev->ieee80211_ptr = &vif->wdev;
			SET_NETDEV_DEV(ifp->ndev, wiphy_dev(cfg->wiphy));
		}
		spin_unlock(&event->vif_event_lock);
		wake_up(&event->vif_wq);
		return 0;

	case BRCMF_E_IF_DEL:
		spin_unlock(&event->vif_event_lock);
		/* event may not be upon user request */
		if (brcmf_cfg80211_vif_event_armed(cfg))
			wake_up(&event->vif_wq);
		return 0;

	case BRCMF_E_IF_CHANGE:
		spin_unlock(&event->vif_event_lock);
		wake_up(&event->vif_wq);
		return 0;

	default:
		spin_unlock(&event->vif_event_lock);
		break;
	}
	return -EINVAL;
}

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.