netdev - Re: [PATCH] veth: Fix race with AF_XDP exposing old or uninitialized descriptors

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Message-ID: <20221221170700.32e5ddc6@kernel.org>
Date:   Wed, 21 Dec 2022 17:07:00 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Shawn Bohrer <sbohrer@...udflare.com>
Cc:     magnus.karlsson@...il.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org, bjorn@...nel.org, kernel-team@...udflare.com,
        davem@...emloft.net
Subject: Re: [PATCH] veth: Fix race with AF_XDP exposing old or
 uninitialized descriptors

On Tue, 20 Dec 2022 12:59:03 -0600 Shawn Bohrer wrote:
>  	if (stats.xdp_tx > 0)
>  		veth_xdp_flush(rq, &bq);

This one does not need similar treatment, right?
Only thing I could spot is potential races in updating stats, 
but that seems like a larger issue with veth xdp.

> -	if (stats.xdp_redirect > 0)
> -		xdp_do_flush();