netdev - Re: [PATCH net] net: tg3: fix NULL pointer dereference in tg3_io_error_detected and tg3_io_slot

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Message-Id: <20130815.134154.150400473673493400.davem@davemloft.net>
Date:	Thu, 15 Aug 2013 13:41:54 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mchan@...adcom.com
Cc:	nsujir@...adcom.com, netdev@...r.kernel.org, dborkman@...hat.com,
	shangw@...ux.vnet.ibm.com
Subject: Re: [PATCH net] net: tg3: fix NULL pointer dereference in
 tg3_io_error_detected and tg3_io_slot_reset

From: "Michael Chan" <mchan@...adcom.com>
Date: Thu, 15 Aug 2013 08:15:20 -0700

> On Thu, 2013-08-15 at 01:07 -0700, David Miller wrote: 
>> From: "Nithin Nayak Sujir" <nsujir@...adcom.com>
>> Date: Tue, 13 Aug 2013 11:45:13 -0700
>> 
>> > From: Daniel Borkmann <dborkman@...hat.com>
>> > 
>> > Commit d8af4dfd8 ("net/tg3: Fix kernel crash") introduced a possible
>> > NULL pointer dereference in tg3 driver when !netdev || !netif_running(netdev)
>> > condition is met and netdev is NULL. Then, the jump to the 'done' label
>> > calls dev_close() with a netdevice that is NULL. Therefore, only call
>> > dev_close() when we have a netdevice, but one that is not running.
>> > 
>> > [ Add the same checks in tg3_io_slot_reset() per Gavin Shan - by Nithin
>> > Nayak Sujir ]
>> > 
>> > Reported-by: Dave Jones <davej@...hat.com>
>> > Signed-off-by: Daniel Borkmann <dborkman@...hat.com>
>> > Cc: Gavin Shan <shangw@...ux.vnet.ibm.com>
>> > Cc: Michael Chan <mchan@...adcom.com>
>> > Signed-off-by: Nithin Nayak Sujir <nsujir@...adcom.com>
>> 
>> Can I get some reviews from the Broadcom folks?
>> 
> 
> We worked with Daniel at Red Hat and Gavin at IBM on this patch.
> Thanks.
> 
> Signed-off-by: Michael Chan <mchan@...adcom.com>

Thanks for the info, applied.

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