netdev - Re: [Patch net] garp: fix a NULL pointer dereference bug

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Message-ID: <1362390955.2383.2.camel@cr0>
Date:	Mon, 04 Mar 2013 17:55:55 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, bugs@...m.in,
	David Ward <david.ward@...mit.edu>,
	Stephen Hemminger <stephen@...workplumber.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net] garp: fix a NULL pointer dereference bug

On Sun, 2013-03-03 at 21:26 -0800, Eric Dumazet wrote:
> 
> Nope this patch doesnt solve the problem
> 
> Crash is in :
> 
> 49 8b 1c c6             mov    (%r14,%rax,8),%rbx 
> 
> Thats because r14 (port) is NULL
> 
> 
> 

Hmm, but I can't see how it can be NULL, the only place of NULL'ing it
is inside garp_release_port(), right after the piece of code that I
patched.

Thanks!

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