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authorJulia Lawall <julia@diku.dk>2007-12-10 17:14:46 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-12-11 02:45:27 -0800
commit505a41d43c24345f3fa77ddab152d1f82dd8264d (patch)
treef7d30d04faa899cf0ac3a36f29e0b3b1227837c2
parent95a02cfd4d33886c166d4a5f309120f8d32ced58 (diff)
[UM]: Fix use of skb after netif_rx
Recently, Wang Chen submitted a patch (d30f53aeb31d453a5230f526bea592af07944564) to move a call to netif_rx(skb) after a subsequent reference to skb, because netif_rx may call kfree_skb on its argument. The same problem occurs in some other drivers as well. This was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression skb, e,e1; @@ ( netif_rx(skb); | netif_rx_ni(skb); ) ... when != skb = e ( skb = e1 | * skb ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/um/drivers/net_kern.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 73681f1..3c6c44c 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -98,10 +98,10 @@ static int uml_net_rx(struct net_device *dev)
if (pkt_len > 0) {
skb_trim(skb, pkt_len);
skb->protocol = (*lp->protocol)(skb);
- netif_rx(skb);
lp->stats.rx_bytes += skb->len;
lp->stats.rx_packets++;
+ netif_rx(skb);
return pkt_len;
}