netdev - Re: [PATCH net-next v3] ethtool: tunnels: check the return value of nla_nest

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Date:   Thu, 22 Sep 2022 19:28:04 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Li Zhong <floridsleeves@...il.com>
Cc:     netdev@...r.kernel.org, pabeni@...hat.com, edumazet@...gle.com,
        davem@...emloft.net
Subject: Re: [PATCH net-next v3] ethtool: tunnels: check the return value of
 nla_nest_start()

On Wed, 21 Sep 2022 11:17:16 -0700 Li Zhong wrote:
> It will cause null pointer dereference when entry is used
> in nla_nest_end().

No it will not, there is no way for the flow to get to nla_nest_end()
if the skb is full :/

I will fix the commit message myself and apply but I'd like you to not
send more "error checking" patches to networking unless you're sure
that there is indeed a bug.