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Date:   Mon, 20 Jan 2020 11:57:14 +0200
From:   Ido Schimmel <>
To:     "Hans-Christian Egtvedt (hegtvedt)" <>
Cc:     "" <>,
        "" <>,
        Eric Dumazet <>,
        Greg Kroah-Hartman <>
Subject: Re: Regression in macvlan driver in stable release 4.4.209

On Mon, Jan 20, 2020 at 09:17:35AM +0000, Hans-Christian Egtvedt (hegtvedt) wrote:
> Hello,
> I am seeing a regression in the macvlan kernel driver after Linux stable 
> release 4.4.209, bisecting identifies commit 

Noticed it too last week (on net-next), but Eric already fixed it:

I assume the patch will find its way to 4.4.y soon now that it is in

> There seems to be a history behind this, and I do not have the full 
> overview of the intention behind the change.
> What I see on my target, Aarch64 CPU, is that this patch moves the eth 
> pointer in macvlan_broadcast() function some bytes. This will cause 
> everything within the ethhdr struct to be wrong AFAICT.
> An example:
> Original code "eth = eth_hdr(skb)"
>     eth = ffffffc007a1b002
> New code "eth = skb_eth_hdr(skb)"
>     eth = ffffffc007a1b010
> Let me know if I can assist in any way.
> -- 
> Best regards,
> Hans-Christian Noren Egtvedt

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