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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Florian Fainelli , Pawel Dembicki , Linus Walleij , linux-kernel@vger.kernel.org Subject: [PATCH v2 net] net: dsa: vsc73xx: fix reception from VLAN-unaware bridges Date: Mon, 14 Oct 2024 18:30:41 +0300 Message-ID: <20241014153041.1110364-1-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.43.0 X-ClientProxiedBy: VI1PR07CA0308.eurprd07.prod.outlook.com (2603:10a6:800:130::36) To AM8PR04MB7779.eurprd04.prod.outlook.com (2603:10a6:20b:24b::14) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM8PR04MB7779:EE_|AS8PR04MB8183:EE_ X-MS-Office365-Filtering-Correlation-Id: c797b693-2ae1-4599-d0ff-08dcec6531a1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|52116014|376014|38350700014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM8PR04MB7779.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(7416014)(52116014)(376014)(38350700014);DIR:OUT;SFP:1101; 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In fact, this option breaks packet reception. The ds->untag_bridge_pvid option strips VLANs from packets received on VLAN-unaware bridge ports. But those VLANs should already be stripped by tag_vsc73xx_8021q.c as part of vsc73xx_rcv() - they are not VLANs in VLAN-unaware mode, but DSA tags. Thus, dsa_software_vlan_untag() tries to untag a VLAN that doesn't exist, corrupting the packet. Fixes: 93e4649efa96 ("net: dsa: provide a software untagging function on RX for VLAN-aware bridges") Tested-by: Pawel Dembicki Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Reviewed-by: Linus Walleij --- v1->v2: - retarget to 'net' - rewrite commit message Link to v1: https://lore.kernel.org/netdev/20241008104657.3549151-1-vladimir.oltean@nxp.com/ drivers/net/dsa/vitesse-vsc73xx-core.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c index e4b98fd51643..f18aa321053d 100644 --- a/drivers/net/dsa/vitesse-vsc73xx-core.c +++ b/drivers/net/dsa/vitesse-vsc73xx-core.c @@ -851,7 +851,6 @@ static int vsc73xx_setup(struct dsa_switch *ds) dev_info(vsc->dev, "set up the switch\n"); - ds->untag_bridge_pvid = true; ds->max_num_bridges = DSA_TAG_8021Q_MAX_NUM_BRIDGES; ds->fdb_isolation = true;