netdev - [PATCH 06/12] can: ti_heccn: don't touch skb after netif

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Message-Id: <1436944189-26618-7-git-send-email-mkl@pengutronix.de>
Date:	Wed, 15 Jul 2015 09:09:43 +0200
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, linux-can@...r.kernel.org,
	kernel@...gutronix.de, Marc Kleine-Budde <mkl@...gutronix.de>,
	Anant Gole <anantgole@...com>
Subject: [PATCH 06/12] can: ti_heccn: don't touch skb after netif_rx()

There is no guarantee that the skb is in the same state after calling
net_receive_skb() or netif_rx(). It might be freed or reused. Not really
harmful as its a read access, except you turn on the proper debugging options
which catch a use after free.

Cc: Anant Gole <anantgole@...com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/ti_hecc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index e95a9e1a889f..cf345cbfe819 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -747,9 +747,9 @@ static int ti_hecc_error(struct net_device *ndev, int int_status,
 		}
 	}
 
-	netif_rx(skb);
 	stats->rx_packets++;
 	stats->rx_bytes += cf->can_dlc;
+	netif_rx(skb);
 
 	return 0;
 }
-- 
2.1.4

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