[PATCH] wireless: More WE-21 potential overflows...

After the Orinoco issue, I did an audit of other drivers for the same
issue.  Three drivers were NULL terminating the ESSID, which could cause an
overflow in WE-21 when the ESSID has maximum size.
Signed-off-by: NJean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/airo.c

@@ -5970,7 +5970,6 @@ static int airo_get_essid(struct net_device *dev,
 
 	/* Get the current SSID */
 	memcpy(extra, status_rid.SSID, status_rid.SSIDlen);
-	extra[status_rid.SSIDlen] = '\0';
 	/* If none, we may want to get the one that was set */
 
 	/* Push it out ! */

drivers/net/wireless/atmel.c

@@ -1678,11 +1678,9 @@ static int atmel_get_essid(struct net_device *dev,
 	/* Get the current SSID */
 	if (priv->new_SSID_size != 0) {
 		memcpy(extra, priv->new_SSID, priv->new_SSID_size);
-		extra[priv->new_SSID_size] = '\0';
 		dwrq->length = priv->new_SSID_size;
 	} else {
 		memcpy(extra, priv->SSID, priv->SSID_size);
-		extra[priv->SSID_size] = '\0';
 		dwrq->length = priv->SSID_size;
 	}
 

drivers/net/wireless/ray_cs.c

@@ -1198,7 +1198,6 @@ static int ray_get_essid(struct net_device *dev,
 
 	/* Get the essid that was set */
 	memcpy(extra, local->sparm.b5.a_current_ess_id, IW_ESSID_MAX_SIZE);
-	extra[IW_ESSID_MAX_SIZE] = '\0';
 
 	/* Push it out ! */
 	dwrq->length = strlen(extra);