From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 9 Apr 2014 20:32:16 +0000 (+0200)
Subject: cfg80211: reject invalid IBSS BSSIDs in wext compat code
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=74f8274103b78bf227711e655656dc737ad2bda7;p=linux-beck.git

cfg80211: reject invalid IBSS BSSIDs in wext compat code

Don't allow using a multicast address as the BSSID, that
isn't a valid configuration.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index e16cc132c58a..f55f6ffcfcec 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -481,6 +481,9 @@ int cfg80211_ibss_wext_siwap(struct net_device *dev,
 	if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
 		bssid = NULL;
 
+	if (bssid && !is_valid_ether_addr(bssid))
+		return -EINVAL;
+
 	/* both automatic */
 	if (!bssid && !wdev->wext.ibss.bssid)
 		return 0;