netdev - Re: [PATCH 5.4.y] net: dsa: mt7530: fix VLAN traffic leaks again

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Message-ID: <YS9HwpC9TulUvps/@kroah.com>
Date:   Wed, 1 Sep 2021 11:28:34 +0200
From:   Greg KH <greg@...ah.com>
To:     DENG Qingfang <dqfext@...il.com>
Cc:     stable@...r.kernel.org, Vladimir Oltean <olteanv@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sean Wang <sean.wang@...iatek.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "open list:MEDIATEK SWITCH DRIVER" <netdev@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5.4.y] net: dsa: mt7530: fix VLAN traffic leaks again

On Mon, Aug 23, 2021 at 03:09:27PM +0800, DENG Qingfang wrote:
> [ Upstream commit 7428022b50d0fbb4846dd0f00639ea09d36dff02 ]
> 
> When a port leaves a VLAN-aware bridge, the current code does not clear
> other ports' matrix field bit. If the bridge is later set to VLAN-unaware
> mode, traffic in the bridge may leak to that port.
> 
> Remove the VLAN filtering check in mt7530_port_bridge_leave.
> 
> Fixes: 4fe4e1f48ba1 ("net: dsa: mt7530: fix VLAN traffic leaks")
> Fixes: 83163f7dca56 ("net: dsa: mediatek: add VLAN support for MT7530")
> Signed-off-by: DENG Qingfang <dqfext@...il.com>
> Reviewed-by: Vladimir Oltean <olteanv@...il.com>
> Signed-off-by: David S. Miller <davem@...emloft.net>
> ---
>  drivers/net/dsa/mt7530.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)

Now queued up, thanks.

greg k-h