From: David Miller <davem@davemloft.net>
To: jarkao2@gmail.com
Cc: error27@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] hamradio: avoid null deref
Date: Wed, 23 Dec 2009 13:32:36 -0800 (PST) [thread overview]
Message-ID: <20091223.133236.104065227.davem@davemloft.net> (raw)
In-Reply-To: <4B3257C2.2050500@gmail.com>
From: Jarek Poplawski <jarkao2@gmail.com>
Date: Wed, 23 Dec 2009 18:47:46 +0100
> Dan Carpenter wrote, On 12/23/2009 02:25 PM:
>
>> If dev == NULL we shouldn't dereference it.
>>
>> 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 2009-12-22 23:59:46.000000000 +0200
>> @@ -283,7 +283,6 @@ static netdev_tx_t bpq_xmit(struct sk_bu
>> bpq = netdev_priv(dev);
>>
>> if ((dev = bpq_get_ether_dev(dev)) == NULL) {
>> - dev->stats.tx_dropped++;
>
> Why not use a separate variable for another dev? This stat
> should be helpful for debugging.
And that is definitely the intent of the code here, to
bump the statistic in the original device object.
next prev parent reply other threads:[~2009-12-23 21:32 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 [this message]
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 ` [patch] hamradio: avoid null deref v3 Dan Carpenter
2010-01-04 5:44 ` David Miller
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