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Date:   Tue, 20 Sep 2022 12:41:48 -0700
From:   Jakub Kicinski <kuba@kernel.org>
To:     Li Zhong <floridsleeves@gmail.com>
Cc:     linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        pabeni@redhat.com, edumazet@google.com, davem@davemloft.net
Subject: Re: [PATCH v1] net/ethtool/tunnels: check the return value of
 nla_nest_start()
Message-ID: <20220920124148.58e8aab5@kernel.org>
In-Reply-To: <CAMEuxRq3YDsCVBrdP78HnPeL7UcFiLWwKt6mEB2D+EVeSWG+pw@mail.gmail.com>
References: <20220917022602.3843619-1-floridsleeves@gmail.com>
        <20220920113744.64b16924@kernel.org>
        <CAMEuxRq3YDsCVBrdP78HnPeL7UcFiLWwKt6mEB2D+EVeSWG+pw@mail.gmail.com>
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On Tue, 20 Sep 2022 12:31:29 -0700 Li Zhong wrote:
> On Tue, Sep 20, 2022 at 11:37 AM Jakub Kicinski <kuba@kernel.org> wrote:
> > On Fri, 16 Sep 2022 19:26:02 -0700 Li Zhong wrote:  
> > >                       goto err_cancel_table;
> > >
> > >               entry = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY);
> > > +             if (!entry)
> > > +                     return -EMSGSIZE;  
> >
> > not even correct, and completely harmless  
> 
> Thanks for your reply. Maybe a more suitable way of error handling is 'goto
> err_cancel_table;'?

Yes, but you _most_ provide the detailed analysis of the impact 
in the commit message for the patches to be considered for merging.