[PATCH] libertas: skb dereferenced after netif_rx

In libertas_process_rxed_packet() and process_rxed_802_11_packet() the
skb is dereferenced after being passed to netif_rx (called from
libertas_upload_rx_packet). Spotted by Coverity (1658, 1659).

Also, libertas_upload_rx_packet() unconditionally returns 0 so the error
check is dead code - might as well take it out and change the signature.

Signed-off-by: Florin Malita <fmalita@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/decl.h

@@ -46,7 +46,7 @@ u32 libertas_index_to_data_rate(u8 index);
 u8 libertas_data_rate_to_index(u32 rate);
 void libertas_get_fwversion(wlan_adapter * adapter, char *fwversion, int maxlen);
 
-int libertas_upload_rx_packet(wlan_private * priv, struct sk_buff *skb);
+void libertas_upload_rx_packet(wlan_private * priv, struct sk_buff *skb);
 
 /** The proc fs interface */
 int libertas_process_rx_command(wlan_private * priv);

drivers/net/wireless/libertas/rx.c

@@ -136,7 +136,7 @@ static void wlan_compute_rssi(wlan_private * priv, struct rxpd *p_rx_pd)
 	LEAVE();
 }
 
-int libertas_upload_rx_packet(wlan_private * priv, struct sk_buff *skb)
+void libertas_upload_rx_packet(wlan_private * priv, struct sk_buff *skb)
 {
 	lbs_pr_debug(1, "skb->data=%p\n", skb->data);
 
@@ -148,8 +148,6 @@ int libertas_upload_rx_packet(wlan_private * priv, struct sk_buff *skb)
 	skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 	netif_rx(skb);
-
-	return 0;
 }
 
 /**
@@ -269,15 +267,11 @@ int libertas_process_rxed_packet(wlan_private * priv, struct sk_buff *skb)
 	wlan_compute_rssi(priv, p_rx_pd);
 
 	lbs_pr_debug(1, "RX Data: size of actual packet = %d\n", skb->len);
-	if (libertas_upload_rx_packet(priv, skb)) {
-		lbs_pr_debug(1, "RX error: libertas_upload_rx_packet"
-		       " returns failure\n");
-		ret = -1;
-		goto done;
-	}
 	priv->stats.rx_bytes += skb->len;
 	priv->stats.rx_packets++;
 
+	libertas_upload_rx_packet(priv, skb);
+
 	ret = 0;
 done:
 	LEAVE();
@@ -438,17 +432,11 @@ static int process_rxed_802_11_packet(wlan_private * priv, struct sk_buff *skb)
 	wlan_compute_rssi(priv, prxpd);
 
 	lbs_pr_debug(1, "RX Data: size of actual packet = %d\n", skb->len);
-
-	if (libertas_upload_rx_packet(priv, skb)) {
-		lbs_pr_debug(1, "RX error: libertas_upload_rx_packet "
-			"returns failure\n");
-		ret = -1;
-		goto done;
-	}
-
 	priv->stats.rx_bytes += skb->len;
 	priv->stats.rx_packets++;
 
+	libertas_upload_rx_packet(priv, skb);
+
 	ret = 0;
 done:
 	LEAVE();