linux-kernel - Re: [PATCH net] net: enetc: avoid buffer leaks on xdp_do

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Message-ID: <20221214121725.g4ox7it4aeumde6x@skbuf>
Date:   Wed, 14 Dec 2022 14:17:25 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        linux-kernel@...r.kernel.org,
        Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
Subject: Re: [PATCH net] net: enetc: avoid buffer leaks on xdp_do_redirect()
 failure

On Tue, Dec 13, 2022 at 02:19:08AM +0200, Vladimir Oltean wrote:
> The problem, summarized, is that we zeroize rx_swbd->page before we're
> completely done with it, and this makes it impossible for the error path
> to do something with it.
> ---

I was pretty tired when I wrote this commit message, please let me know
if it rambles too much or it misses the point, I can rewrite it and
shorten it if needed.