irda: fix a race in irlan_eth_xmit()
After skb is queued, its illegal to dereference it.
Cache skb->len into a temporary variable.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/irda/irlan/irlan_eth.c b/net/irda/irlan/irlan_eth.c
index 9616c32..5bb8353 100644
--- a/net/irda/irlan/irlan_eth.c
+++ b/net/irda/irlan/irlan_eth.c
@@ -169,6 +169,7 @@
{
struct irlan_cb *self = netdev_priv(dev);
int ret;
+ unsigned int len;
/* skb headroom large enough to contain all IrDA-headers? */
if ((skb_headroom(skb) < self->max_header_size) || (skb_shared(skb))) {
@@ -188,6 +189,7 @@
dev->trans_start = jiffies;
+ len = skb->len;
/* Now queue the packet in the transport layer */
if (self->use_udata)
ret = irttp_udata_request(self->tsap_data, skb);
@@ -209,7 +211,7 @@
self->stats.tx_dropped++;
} else {
self->stats.tx_packets++;
- self->stats.tx_bytes += skb->len;
+ self->stats.tx_bytes += len;
}
return NETDEV_TX_OK;