netdev - Re: [PATCH net] net: mvneta: fix possible use-after-free in mvneta_xdp_put

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Message-ID: <20200910142320.163ecb67@carbon>
Date:   Thu, 10 Sep 2020 14:23:20 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     brouer@...hat.com, netdev@...r.kernel.org,
        lorenzo.bianconi@...hat.com, davem@...emloft.net, kuba@...nel.org,
        thomas.petazzoni@...tlin.com, echaudro@...hat.com
Subject: Re: [PATCH net] net: mvneta: fix possible use-after-free in
 mvneta_xdp_put_buff

On Thu, 10 Sep 2020 11:08:01 +0200
Lorenzo Bianconi <lorenzo@...nel.org> wrote:

> Release first buffer as last one since it contains references
> to subsequent fragments. This code will be optimized introducing
> multi-buffer bit in xdp_buff structure.
> 
> Fixes: ca0e014609f05 ("net: mvneta: move skb build after descriptors processing")
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>

Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer