caif: added check for potential null return

Add check on NULL return from caif_get(). Signed-off-by: Kim Lilliestierna <Kim.xx.Lilliestierna@stericsson.com> Signed-off-by: Sjur Brændeland <sjur.brandeland@stericssion.com> Signed-off-by: David S. Miller <davem@davemloft.net>
gibsson · Jun 25, 2012 · c95567c · c95567c
1 parent be4852c
commit c95567c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
@@ -128,6 +128,11 @@ void caif_flow_cb(struct sk_buff *skb)
 
 	rcu_read_lock();
 	caifd = caif_get(skb->dev);
+
+	WARN_ON(caifd == NULL);
+	if (caifd == NULL)
+		return;
+
 	caifd_hold(caifd);
 	rcu_read_unlock();