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From: DENG Qingfang <dqfext@gmail.com>
To: Sean Wang <sean.wang@mediatek.com>,
	Landen Chao <Landen.Chao@mediatek.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Russell King <linux@armlinux.org.uk>,
	netdev@vger.kernel.org (open list:MEDIATEK SWITCH DRIVER),
	linux-arm-kernel@lists.infradead.org (moderated
	list:ARM/Mediatek SoC support),
	linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek
	SoC support), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH net-next] net: dsa: mt7530: fix VLAN traffic leaks again
Date: Wed, 11 Aug 2021 17:50:43 +0800	[thread overview]
Message-ID: <20210811095043.1700061-1-dqfext@gmail.com> (raw)

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: 474a2ddaa192 ("net: dsa: mt7530: fix VLAN traffic leaks")
Fixes: 83163f7dca56 ("net: dsa: mediatek: add VLAN support for MT7530")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
---
 drivers/net/dsa/mt7530.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 53e6150e95b6..77e0205e4e59 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1315,11 +1315,8 @@ mt7530_port_bridge_leave(struct dsa_switch *ds, int port,
 		/* Remove this port from the port matrix of the other ports
 		 * in the same bridge. If the port is disabled, port matrix
 		 * is kept and not being setup until the port becomes enabled.
-		 * And the other port's port matrix cannot be broken when the
-		 * other port is still a VLAN-aware port.
 		 */
-		if (dsa_is_user_port(ds, i) && i != port &&
-		   !dsa_port_is_vlan_filtering(dsa_to_port(ds, i))) {
+		if (dsa_is_user_port(ds, i) && i != port) {
 			if (dsa_to_port(ds, i)->bridge_dev != bridge)
 				continue;
 			if (priv->ports[i].enable)
-- 
2.25.1


             reply	other threads:[~2021-08-11  9:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-11  9:50 DENG Qingfang [this message]
2021-08-11 10:01 ` Vladimir Oltean
2021-08-12 10:00 ` patchwork-bot+netdevbpf

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