brcmf_set_sharedkey(struct net_device *ndev,
		    struct cfg80211_connect_params *sme)
{
	struct brcmf_cfg80211_profile *profile = ndev_to_prof(ndev);
	struct brcmf_cfg80211_security *sec;
	struct brcmf_wsec_key key;
	s32 val;
	s32 err = 0;

	brcmf_dbg(CONN, "key len (%d)\n", sme->key_len);

	if (sme->key_len == 0)
		return 0;

	sec = &profile->sec;
	brcmf_dbg(CONN, "wpa_versions 0x%x cipher_pairwise 0x%x\n",
		  sec->wpa_versions, sec->cipher_pairwise);

	if (sec->wpa_versions & (NL80211_WPA_VERSION_1 | NL80211_WPA_VERSION_2))
		return 0;

	if (!(sec->cipher_pairwise &
	    (WLAN_CIPHER_SUITE_WEP40 | WLAN_CIPHER_SUITE_WEP104)))
		return 0;

	memset(&key, 0, sizeof(key));
	key.len = (u32) sme->key_len;
	key.index = (u32) sme->key_idx;
	if (key.len > sizeof(key.data)) {
		brcmf_err("Too long key length (%u)\n", key.len);
		return -EINVAL;
	}
	memcpy(key.data, sme->key, key.len);
	key.flags = BRCMF_PRIMARY_KEY;
	switch (sec->cipher_pairwise) {
	case WLAN_CIPHER_SUITE_WEP40:
		key.algo = CRYPTO_ALGO_WEP1;
		break;
	case WLAN_CIPHER_SUITE_WEP104:
		key.algo = CRYPTO_ALGO_WEP128;
		break;
	default:
		brcmf_err("Invalid algorithm (%d)\n",
			  sme->crypto.ciphers_pairwise[0]);
		return -EINVAL;
	}
	/* Set the new key/index */
	brcmf_dbg(CONN, "key length (%d) key index (%d) algo (%d)\n",
		  key.len, key.index, key.algo);
	brcmf_dbg(CONN, "key \"%s\"\n", key.data);
	err = send_key_to_dongle(netdev_priv(ndev), &key);
	if (err)
		return err;

	if (sec->auth_type == NL80211_AUTHTYPE_SHARED_KEY) {
		brcmf_dbg(CONN, "set auth_type to shared key\n");
		val = WL_AUTH_SHARED_KEY;	/* shared key */
		err = brcmf_fil_bsscfg_int_set(netdev_priv(ndev), "auth", val);
		if (err)
			brcmf_err("set auth failed (%d)\n", err);
	}
	return err;
}

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.