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

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Message-ID: <20190531145428.ngwrgbnk2a7us5cy@gondor.apana.org.au>
Date:   Fri, 31 May 2019 22:54:28 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     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 Fri, May 31, 2019 at 07:50:06AM -0700, Eric Dumazet wrote:
>
> 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 ?

AFAICS this is the code-path for locally generated outbound packets.
Under what circumstances can the IPv6 header be not in the head?

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt