linux-kernel - Re: Re: [PATCH V2] netfilter: h323: avoid potential attack

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Message-ID: <1453989650.7627.30.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 28 Jan 2016 06:00:50 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Zhouyi Zhou <yizhouzhou@....ac.cn>
Cc:	Zhouyi Zhou <zhouzhouyi@...il.com>, pablo@...filter.org,
	kaber@...sh.net, kadlec@...ckhole.kfki.hu, davem@...emloft.net,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Re: [PATCH V2] netfilter: h323: avoid potential attack

On Thu, 2016-01-28 at 21:14 +0800, Zhouyi Zhou wrote:

> My patch is intend to prevent kernel panic, to prevent reading garbage
> or read data from a prior frame and leak secrets, the prototypes of the 
> get_h2x5_addr functions and the functions that call get_h2x5_addr should
> be changed, should we do this? 

In term of security, panics are better than allowing attacker to read
data from other people, like a password.

BTW, are you able to trigger any panic ?

I am not familiar with this code, it is not obvious.

If a fix is needed, better doing it right.