netdev - Re: [PATCH] ipv6: Fix possible NULL dereference in icmp6_dst

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Message-ID: <20100127103417.GA15206@ff.dom.local>
Date:	Wed, 27 Jan 2010 10:34:17 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	shemminger@...tta.com, djohnson@...rentnetworks.com,
	sakkiped@...rentnetworks.com, netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: Fix possible NULL dereference in icmp6_dst_alloc

On Wed, Jan 27, 2010 at 02:14:24AM -0800, David Miller wrote:
> From: Jarek Poplawski <jarkao2@...il.com>
> Date: Wed, 27 Jan 2010 09:59:52 +0000
> 
> > While looking at the "Deadlock in IPv6 code while garbage collection
> > on the rwlock protecting the routing tree" reported by Srinivas
> > Akkipeddi I found there is possible a NULL pointer dereference in
> > icmp6_dst_alloc().
> > 
> > Signed-off-by: Jarek Poplawski <jarkao2@...il.com>
> 
> Jarek, if rt is NULL so is &rt->u.dst
> 
> That's two patches trying to fix this same non-problem in
> two different places today :-)

Yes, great joke! :-\

(Btw, maybe it's a sign this might be more readable?)

Thanks,
Jarek P.
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