netdev - Re: [PATCH net-next v3 4/8] udp: never accept GSO

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Message-ID: <CA+FuTSe9q2+PiGvUnyNSs48CjzABotNn1CE8V0VXKFwuhBhMOQ@mail.gmail.com>
Date:   Tue, 30 Mar 2021 11:14:01 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        Alexander Lobakin <alobakin@...me>
Subject: Re: [PATCH net-next v3 4/8] udp: never accept GSO_FRAGLIST packets

On Tue, Mar 30, 2021 at 6:30 AM Paolo Abeni <pabeni@...hat.com> wrote:
>
> Currently the UDP protocol delivers GSO_FRAGLIST packets to
> the sockets without the expected segmentation.
>
> This change addresses the issue introducing and maintaining
> a couple of new fields to explicitly accept SKB_GSO_UDP_L4
> or GSO_FRAGLIST packets. Additionally updates  udp_unexpected_gso()
> accordingly.
>
> UDP sockets enabling UDP_GRO stil keep accept_udp_fraglist
> zeroed.
>
> v1 -> v2:
>  - use 2 bits instead of a whole GSO bitmask (Willem)
>
> Fixes: 9fd1ff5d2ac7 ("udp: Support UDP fraglist GRO/GSO.")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Reviewed-by: Willem de Bruijn <willemb@...gle.com>