From: Dan Carpenter <error27@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: jarkao2@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [patch] hamradio: avoid null deref v3
Date: Mon, 28 Dec 2009 18:54:55 +0200 [thread overview]
Message-ID: <20091228165455.GA17645@bicker> (raw)
In-Reply-To: <20091226.201729.15225529.davem@davemloft.net>
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>
--- orig/drivers/net/hamradio/bpqether.c 2009-12-22 23:58:56.000000000 +0200
+++ devel/drivers/net/hamradio/bpqether.c 2009-12-28 00:12:48.000000000 +0200
@@ -248,6 +248,7 @@ static netdev_tx_t bpq_xmit(struct sk_bu
{
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_bu
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;
}
next prev parent reply other threads:[~2009-12-28 16:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-23 13:25 [patch] hamradio: avoid null deref Dan Carpenter
2009-12-23 17:47 ` Jarek Poplawski
2009-12-23 21:32 ` David Miller
2009-12-26 12:38 ` [patch] hamradio: avoid null deref v2 Dan Carpenter
2009-12-27 4:17 ` David Miller
2009-12-28 16:54 ` Dan Carpenter [this message]
2010-01-04 5:44 ` [patch] hamradio: avoid null deref v3 David Miller
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