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authorHerbert Xu <herbert@gondor.apana.org.au>2014-04-22 17:15:34 +0800
committerDavid S. Miller <davem@davemloft.net>2014-04-23 14:55:30 -0400
commite676f197a7a9aae9c75b0d9acc97e07de07dd1f0 (patch)
treedb202a9e7297998bde3b43e6cd94092d7c942a25 /drivers/net/macvlan.c
parent2abf967b9304bdc0f6e2b42d4e7a25c3556c0fc4 (diff)
macvlan: Fix leak and NULL dereference on error path
The recent patch that moved broadcasts to process context added a couple of bugs on the error path where we may dereference NULL or leak an skb. This patch fixes them. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macvlan.c')
-rw-r--r--drivers/net/macvlan.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 8b8220fcdd3d..cfb27c865417 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -239,25 +239,28 @@ static void macvlan_process_broadcast(struct work_struct *w)
static void macvlan_broadcast_enqueue(struct macvlan_port *port,
struct sk_buff *skb)
{
+ struct sk_buff *nskb;
int err = -ENOMEM;
- skb = skb_clone(skb, GFP_ATOMIC);
- if (!skb)
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (!nskb)
goto err;
spin_lock(&port->bc_queue.lock);
if (skb_queue_len(&port->bc_queue) < skb->dev->tx_queue_len) {
- __skb_queue_tail(&port->bc_queue, skb);
+ __skb_queue_tail(&port->bc_queue, nskb);
err = 0;
}
spin_unlock(&port->bc_queue.lock);
if (err)
- goto err;
+ goto free_nskb;
schedule_work(&port->bc_work);
return;
+free_nskb:
+ kfree_skb(nskb);
err:
atomic_long_inc(&skb->dev->rx_dropped);
}