netdev - Re: [PATCH 1/15] spidernet: null out skb pointer after its been used.

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Message-ID: <20070614220054.GW4397@austin.ibm.com>
Date:	Thu, 14 Jun 2007 17:00:54 -0500
From:	linas@...tin.ibm.com (Linas Vepstas)
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Michael Ellerman <michael@...erman.id.au>, netdev@...r.kernel.org,
	cbe-oss-dev@...abs.org
Subject: Re: [PATCH 1/15] spidernet: null out skb pointer after its been used.

On Wed, Jun 13, 2007 at 04:10:17PM -0400, Jeff Garzik wrote:
> Linas Vepstas wrote:
> >Avoid kernel crash in mm/slab.c due to double-free of pointer.
> >
> >If the ethernet interface is brought down while there is still
> >RX traffic in flight, the device shutdown routine can end up
> >trying to double-free an skb, leading to a crash in mm/slab.c
> >Avoid the double-free by nulling out the skb pointer.
> >
> >Signed-off-by: Linas Vepstas <linas@...tin.ibm.com>
> >
> >----
> > drivers/net/spider_net.c |    1 +
> > 1 file changed, 1 insertion(+)
> 
> applied 1-5, 7 to #upstream-fixes (2.6.22)
> 
> patch #6 was ignored, because it was already upstream

Thank you!

--linas
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