netdev - Re: [PATCH net 1/1] igb: Initialize mailbox message for VF reset

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Message-ID: <Y5g8J/mFDaW/6GHq@unreal>
Date:   Tue, 13 Dec 2022 10:47:35 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Tony Nguyen <anthony.l.nguyen@...el.com>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, netdev@...r.kernel.org, agraf@...e.de,
        akihiko.odaki@...nix.com, yan@...nix.com,
        gregkh@...uxfoundation.org, security@...nel.org
Subject: Re: [PATCH net 1/1] igb: Initialize mailbox message for VF reset

On Mon, Dec 12, 2022 at 11:00:31AM -0800, Tony Nguyen wrote:
> When a MAC address is not assigned to the VF, that portion of the message
> sent to the VF is not set. The memory, however, is allocated from the
> stack meaning that information may be leaked to the VM. Initialize the
> message buffer to 0 so that no information is passed to the VM in this
> case.
> 
> Fixes: 6ddbc4cf1f4d ("igb: Indicate failure on vf reset for empty mac address")
> Reported-by: Akihiko Odaki <akihiko.odaki@...nix.com>
> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
> Reviewed-by: Akihiko Odaki <akihiko.odaki@...nix.com>
> ---
>  drivers/net/ethernet/intel/igb/igb_main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro@...dia.com>