From f65d1f082c8fb1bfae3f2cb51ec270da9b6366cf Mon Sep 17 00:00:00 2001
From: Dan Carpenter <error27@gmail.com>
Date: Mon, 28 Dec 2009 06:54:55 +0000
Subject: [PATCH] hamradio: avoid null deref v3
This should address the problems in version 1 (lazy) and version 2 (ugly).
Bump the stats on orig_dev not on the newly assigned NULL dev variable.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/hamradio/bpqether.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index ae5f11c8fc13..bdadf3e23c94 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -248,6 +248,7 @@ static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned char *ptr;
struct bpqdev *bpq;
+ struct net_device *orig_dev;
int size;
/*
@@ -282,8 +283,9 @@ static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev)
bpq = netdev_priv(dev);
+ orig_dev = dev;
if ((dev = bpq_get_ether_dev(dev)) == NULL) {
- dev->stats.tx_dropped++;
+ orig_dev->stats.tx_dropped++;
kfree_skb(skb);
return NETDEV_TX_OK;
}
--
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