linux-kernel - Re: [PATCH] ipv6: Prevent overrun when parsing v6 header options

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Message-ID: <727c4b18-0d7b-b3c6-e0bb-41b3fe5902d3@gmail.com>
Date:   Fri, 31 May 2019 07:50:06 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        Eric Dumazet <eric.dumazet@...il.com>
Cc:     Young Xiao <92siuyang@...il.com>, davem@...emloft.net,
        kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Steffen Klassert <steffen.klassert@...unet.com>
Subject: Re: [PATCH] ipv6: Prevent overrun when parsing v6 header options



On 5/30/19 11:29 PM, Herbert Xu wrote:
> On Thu, May 30, 2019 at 10:17:04AM -0700, Eric Dumazet wrote:
>>
>> xfrm6_transport_output() seems buggy as well,
>> unless the skbs are linearized before entering these functions ?
> 
> The headers that it's moving should be linearised.  Is there
> something else I'm missing?
> 

What do you mean by should ?

Are they currently already linearized before the function is called,
or is it missing and a bug needs to be fixed ?