netdev - Re: [PATCH net-next] net: preserve sock reference when scrubbing the skb.

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Message-ID: <afa1296b-9c3a-a60c-da69-76c3fd031bbe@gmail.com>
Date:   Tue, 26 Jun 2018 06:06:36 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Flavio Leitner <fbl@...hat.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        David Miller <davem@...emloft.net>,
        Florian Westphal <fw@...len.de>,
        NetFilter <netfilter-devel@...r.kernel.org>
Subject: Re: [PATCH net-next] net: preserve sock reference when scrubbing the
 skb.



On 06/26/2018 05:38 AM, Flavio Leitner wrote:
> On Mon, Jun 25, 2018 at 11:41:05PM -0700, Eric Dumazet wrote:
>> I am not sure why the patch is so complex, I would have simply
>> removed the skb_orphan().
> 
> All the rest is fixing netfilter to consider the namespaces before
> doing any actions.  For instance, it would be possible to dump GID/UID
> of the process originating the packet in a foreign net namespace.
> 
> Another example is matching if it has a socket or not. I don't think
> it's correct to match on a socket that is on a foreign netns.
> 
> So, you're right that removing the skb_orphan() is the only thing
> required to fix both issues, but then what about the above examples?
> 

Please split the work in two parts.

1) Preparation, with clear commit log :)

2) Removal of skb_orphan()

Thanks !