netdev - Re: [PATCH] drivers/net: ks8842 Fix crash on received packet when in PIO mode.

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Message-ID: <20110519233014.GA7329@dens-work>
Date:	Fri, 20 May 2011 11:30:16 +1200
From:	Dennis Aberilla <dennis.aberilla@...omax.com>
To:	David Miller <davem@...emloft.net>
Cc:	info@...ean-labs.com, netdev@...r.kernel.org
Subject: Re: [PATCH] drivers/net: ks8842 Fix crash on received packet when
	in PIO mode.

On Thu, May 19, 2011 at 04:12:28PM -0400, David Miller wrote:
> From: Dennis Aberilla <dennis.aberilla@...omax.com>
> Date: Thu, 19 May 2011 10:59:47 +1200
> 
> > This patch fixes a kernel crash during packet reception due to not
> > enough allocated bytes for the skb. This applies to the driver when
> > running in PIO mode in an ISA bus setup.
> > 
> > Signed-off-by: Dennis Aberilla <denzzzhome@...oo.com>
> 
> If you're trying to accomodate the fact that the loops iterate
> always by 2 or 4 bytes at a time, then you will need to allocate
> up to "3" bytes of slack space, not just "2".
> 
> You need to describe exactly what the precise problem is in your
> commit message, or else people might find it difficult to figure
> out exactly what the problem is.

Ah right, it should actually be 3. Yes, it accounts for the fact that the
loops are reading the Rx buffer 4 bytes at a time. Sorry it wasn't too
clear previously.

|Dennis
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