linux-kernel - Re: [PATCH 3/6] drivers/net: remove null pointer dereference

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Message-ID: <48287916.2090203@pobox.com>
Date:	Mon, 12 May 2008 13:06:30 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Julia Lawall <julia@...u.dk>
CC:	Francois Romieu <romieu@...zoreil.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 3/6] drivers/net: remove null pointer dereference

Julia Lawall wrote:
> On Mon, 12 May 2008, Francois Romieu wrote:
> 
>> Julia Lawall <julia@...u.dk> :
>> [...]
>>> diff -u -p a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
>>> --- a/drivers/net/au1000_eth.c	2008-04-27 11:41:11.000000000 +0200
>>> +++ b/drivers/net/au1000_eth.c	2008-05-12 09:32:54.000000000 +0200
>>> @@ -1242,7 +1242,7 @@ static irqreturn_t au1000_interrupt(int 
>>>  	struct net_device *dev = (struct net_device *) dev_id;
>>>  
>>>  	if (dev == NULL) {
>>> -		printk(KERN_ERR "%s: isr: null dev ptr\n", dev->name);
>>> +		printk(KERN_ERR "isr: null dev ptr\n");
>>>  		return IRQ_RETVAL(1);
>>>  	}
>> The lifespan of 'dev' covers the request_irq..free_irq interval in this
>> driver. The whole 'dev == NULL' block can be removed.
> 
> Will you do that?

It's normal within the Linux community to give feedback on patches, and 
sometimes the authors need to revise their patches if helpful feedback 
arises.

	Jeff



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