[PATCH] wext: Fix RtNetlink ENCODE security permissions

I've just realised that the RtNetlink code does not check the
permission for SIOCGIWENCODE and SIOCGIWENCODEEXT, which means that
any user can read the encryption keys. The fix is trivial and should
go in 2.6.17 alonside the two other patch I sent you last week.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/core/wireless.c

@@ -1726,6 +1726,14 @@ int wireless_rtnetlink_get(struct net_device *	dev,
 	if(!IW_IS_GET(request->cmd))
 		return -EOPNOTSUPP;
 
+	/* If command is `get the encoding parameters', check if
+	 * the user has the right to do it */
+	if (request->cmd == SIOCGIWENCODE ||
+	    request->cmd == SIOCGIWENCODEEXT) {
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+	}
+
 	/* Special cases */
 	if(request->cmd == SIOCGIWSTATS)
 		/* Get Wireless Stats */