linux-kernel - Re: [PATCH v3 1/1] net: gro: fix misuse of CB in udp socket lookup

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Message-ID: <7adc43f3-725d-84df-065d-7d77d03327f6@kernel.org>
Date:   Fri, 28 Jul 2023 15:21:40 -0600
From:   David Ahern <dsahern@...nel.org>
To:     Richard Gobert <richardbgobert@...il.com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        willemdebruijn.kernel@...il.com, tom@...bertland.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        gal@...dia.com
Subject: Re: [PATCH v3 1/1] net: gro: fix misuse of CB in udp socket lookup

On 7/27/23 9:33 AM, Richard Gobert wrote:
> This patch fixes a misuse of IP{6}CB(skb) in GRO, while calling to
> `udp6_lib_lookup2` when handling udp tunnels. `udp6_lib_lookup2` fetch the
> device from CB. The fix changes it to fetch the device from `skb->dev`.
> l3mdev case requires special attention since it has a master and a slave
> device.
> 
> Fixes: a6024562ffd7 ("udp: Add GRO functions to UDP socket")
> Reported-by: Gal Pressman <gal@...dia.com>
> Signed-off-by: Richard Gobert <richardbgobert@...il.com>
> ---
>  include/net/gro.h      | 43 ++++++++++++++++++++++++++++++++++++++++++
>  net/ipv4/udp.c         |  8 ++++++--
>  net/ipv4/udp_offload.c |  7 +++++--
>  net/ipv6/udp.c         |  8 ++++++--
>  net/ipv6/udp_offload.c |  7 +++++--
>  5 files changed, 65 insertions(+), 8 deletions(-)
> 

I still think the text in the cover letter should be in this commit message.

Code wise, it looks ok to me:
Reviewed-by: David Ahern <dsahern@...nel.org>