netdev - [PATCH] sgi-xp: fix a use after free

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Message-ID: <1308523956.3539.105.camel@edumazet-laptop>
Date:	Mon, 20 Jun 2011 00:52:36 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>, Robin Holt <holt@....com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH] sgi-xp: fix a use after free

Its illegal to dereference skb after dev_kfree_skb(skb)

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
CC: Robin Holt <holt@....com>
---
David, I am not sure Robin is active these days, maybe you can take this
patch, since its clearly network related ?

 drivers/misc/sgi-xp/xpnet.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
index ee5109a..42f0673 100644
--- a/drivers/misc/sgi-xp/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -495,14 +495,14 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		}
 	}
 
+	dev->stats.tx_packets++;
+	dev->stats.tx_bytes += skb->len;
+
 	if (atomic_dec_return(&queued_msg->use_count) == 0) {
 		dev_kfree_skb(skb);
 		kfree(queued_msg);
 	}
 
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += skb->len;
-
 	return NETDEV_TX_OK;
 }
 


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