linux-kernel - [PATCH 1/3] NET: pch, fix use after free

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Message-Id: <1286789218-13976-1-git-send-email-jslaby@suse.cz>
Date:	Mon, 11 Oct 2010 11:26:56 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Masayuki Ohtake <masa-korg@....okisemi.com>
Subject: [PATCH 1/3] NET: pch, fix use after free

Stanse found that pch_gbe_xmit_frame uses skb after it is freed. Fix
that.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Masayuki Ohtake <masa-korg@....okisemi.com>
---
 drivers/net/pch_gbe/pch_gbe_main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/pch_gbe/pch_gbe_main.c b/drivers/net/pch_gbe/pch_gbe_main.c
index 53c56cf..e44644f 100644
--- a/drivers/net/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/pch_gbe/pch_gbe_main.c
@@ -1847,9 +1847,9 @@ static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 	unsigned long flags;
 
 	if (unlikely(skb->len > (adapter->hw.mac.max_frame_size - 4))) {
-		dev_kfree_skb_any(skb);
 		pr_err("Transfer length Error: skb len: %d > max: %d\n",
 		       skb->len, adapter->hw.mac.max_frame_size);
+		dev_kfree_skb_any(skb);
 		adapter->stats.tx_length_errors++;
 		return NETDEV_TX_OK;
 	}
-- 
1.7.3.1


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