From nobody Mon Jun 8 06:36:25 2026 Received: from mail-pj1-f44.google.com (mail-pj1-f44.google.com [209.85.216.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 541ED30F7F2 for ; Wed, 3 Jun 2026 02:42:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780454571; cv=none; b=sW4kZUTVOim8EUpE1G2D3ITexKZs5uBCBqEagKkVI3ZRcmj8Qrv0mZ05uMuB/7yjL18LR2JnU7CfdevN4oq3QB6DzRVuVGOtjul5R/nTvfRCGZpuTL+Fxr43nILELWxPdlCVQIXb/miMkjrAvBPiCNPa86SLiWN60k/RH471qzM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780454571; c=relaxed/simple; bh=nk/5cRH+23kz3i5YCQ7JAJlTZAP5X4KP84ML8CoQwkk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=tRJ8C1dxgIcsFqqKB4GrrplojOIkCDvNtTc52SK5Nq/9BpHMkZYYvfxdlgCLEsye97q85kqzXlZwKxwk/MEJimjPRWGHqCg3HU1aD/f4TSrBJeiD/FnWK496cqx8ITP4hIlCh2R83diTwwbASImCM8mvWtjz9chW61uRTjNEZk8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=cPkotrSr; arc=none smtp.client-ip=209.85.216.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cPkotrSr" Received: by mail-pj1-f44.google.com with SMTP id 98e67ed59e1d1-36d5fd50d20so2808251a91.1 for ; Tue, 02 Jun 2026 19:42:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1780454569; x=1781059369; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=E9hGJ6zw7Uq6VFdPGEv6WZhGo5EeVEyFBc1oHCLMzjg=; b=cPkotrSrblMJg0VkQemG1yM2SrRRSvFa+7n8iSeIxGrPCMgj62Uuj72kSg1OFZzBeq IumtKeQv/zTHcpYKw++cSnMf0RpvfXNG+joFWQjxdTjYjloF077c7UtWPlqCFjZKQ4eA FLR1otwhA0yheoKSFmmLsiXEFDJcecELOcSbFZ2HKMR16CyhEOadW5IsIChyATVRVLJB DqnhDJvR74EbpSe7f/Nt3GMJNwRj5s6WHei/NSq1iGuBn+souh125mbFDFAxjmx9Ybk0 BnAnoXYXAgyGNVl9Ma07eMJKOm60J/+m1jsakIRMwsyOVuwR9ItuQnnAHqxFSWTinCpk xjcQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780454569; x=1781059369; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=E9hGJ6zw7Uq6VFdPGEv6WZhGo5EeVEyFBc1oHCLMzjg=; b=TyE3zZa4UMXapNEZ15wFoCYaep8fDmvDPY+O4AGITeTgMMcDgKyS2Pxha7nkHSWCQQ p0RgqPAWKPd14chzOyNCTuHOOiUCf6/JWPmO24m/i7/Mo14kSawd1rlfMQrTnvQraB2c TDmrju1V9R28cYcxUvJogcQsb73dKPJdAhIIO9PvwjMR+A9oHosduL4ftDmJiS/RNl2V fjLBDzsehU5+5s2rh7qlaaoLs+/LFPhsrGO1PF9bvlD/rc5khO6rUbnF+8+oTgZJQIkf 2jgW6WkoL5B4cJXotMiKJFaNjGd+aZ09AsnZTl4Zesal4QGOEm5rnTJse/TQHhHMQ0yA 5rcg== X-Forwarded-Encrypted: i=1; AFNElJ+6T/vXAm+dZCOQNSrMvSoUWd9xUvJx077vuFfH8OWzfAxks2A5+9IrN8WBN/iglwE4xoOpHghS74EI+5o=@vger.kernel.org X-Gm-Message-State: AOJu0YzwOy0B8m16KRQX9IQjln7x7N7kMxhlobnFW8pc74nnEL23QRwI hnwqJ/XVXyXw0873Ou8pci4G7Qiig+mPSVdnrW9FgprgNkrvWhwVQBLs X-Gm-Gg: Acq92OGKUi93PJsox4jJtKw2uSFXfwicFtMytwr9s/krIcyQo5TxadO/is2nFd0q7Z4 GBOICF3/FyKBeJNuJLggp6e1s/Vfeb73ZutbH5tyU39hnB2vVbL693GsoaU9C0TLHZ6NU1YPfi1 rC7qMh2IlyKeCsUql8uvKj7wQfI5Kr44wJRawBuc0ghAzC+rw8n5pnmAe09kgjct9WyQ9KEp2Y8 CTM+U30IvnSgpIl06neT5ufk7RZcgnBgfgYq26SNTUcA7zAieVGeCFXO9QUon7GQbS147Xkx2T5 OjMDE3G0ddoQJZqNRculz9bQEuQa8XgoSMSn41TgRacouHTg7Qc97DOxGYm8hNsuW/TAgwrOILj JwG4pVFsCGc6MWz2fpCtsFXkTf4ZBhNxeVYf9cTqY3a0NUV9w8ubSm6IKXUWfv80vomIFpMeNss sSo7a1c2mgY8DLmwkmEPCYWnK1916tvfZ2/Oq6ZjQkCpOdtZxtu2BDm05qrNoc X-Received: by 2002:a17:90b:560c:b0:36d:bc0d:f78c with SMTP id 98e67ed59e1d1-36e34292d97mr1367654a91.21.1780454569452; Tue, 02 Jun 2026 19:42:49 -0700 (PDT) Received: from d.home.yangfl.dn42 ([2a09:bac5:661b:3046::4cf:38]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36e6e9be5f2sm164384a91.4.2026.06.02.19.42.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2026 19:42:49 -0700 (PDT) From: David Yang To: netdev@vger.kernel.org Cc: David Yang , Vladimir Oltean , UNGLinuxDriver@microchip.com, Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-kernel@vger.kernel.org Subject: [PATCH net-next] net: dsa: felix: validate switch in .netdev_to_port() conversion Date: Wed, 3 Jun 2026 10:42:30 +0800 Message-ID: <20260603024234.66603-1-mmyangfl@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" felix_netdev_to_port() uses dsa_port_from_netdev() without checking whether the resulting dsa_port actually belongs to the switch being operated on. The port index is then consumed by flower rule parsing, silently resolving to a wrong port on the local hardware. Add a dp->ds mismatch check and adjust struct ocelot_ops accordingly. Signed-off-by: David Yang --- drivers/net/dsa/ocelot/felix.c | 6 ++++-- drivers/net/dsa/ocelot/felix.h | 2 +- drivers/net/ethernet/mscc/ocelot.h | 2 +- drivers/net/ethernet/mscc/ocelot_flower.c | 4 ++-- drivers/net/ethernet/mscc/ocelot_net.c | 2 +- include/soc/mscc/ocelot.h | 2 +- 6 files changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c index 4272ea6e9ca8..84a95007825f 100644 --- a/drivers/net/dsa/ocelot/felix.c +++ b/drivers/net/dsa/ocelot/felix.c @@ -2446,12 +2446,14 @@ struct net_device *felix_port_to_netdev(struct ocel= ot *ocelot, int port) } EXPORT_SYMBOL_GPL(felix_port_to_netdev); =20 -int felix_netdev_to_port(struct net_device *dev) +int felix_netdev_to_port(struct ocelot *ocelot, struct net_device *dev) { + struct felix *felix =3D ocelot_to_felix(ocelot); + struct dsa_switch *ds =3D felix->ds; struct dsa_port *dp; =20 dp =3D dsa_port_from_netdev(dev); - if (IS_ERR(dp)) + if (IS_ERR(dp) || dp->ds !=3D ds) return -EINVAL; =20 return dp->index; diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h index a657b190c5d7..19addcfd62be 100644 --- a/drivers/net/dsa/ocelot/felix.h +++ b/drivers/net/dsa/ocelot/felix.h @@ -104,6 +104,6 @@ int felix_register_switch(struct device *dev, resource_= size_t switch_base, enum dsa_tag_protocol init_tag_proto, const struct felix_info *info); struct net_device *felix_port_to_netdev(struct ocelot *ocelot, int port); -int felix_netdev_to_port(struct net_device *dev); +int felix_netdev_to_port(struct ocelot *ocelot, struct net_device *dev); =20 #endif diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc= /ocelot.h index e50be508c166..42d2c456f712 100644 --- a/drivers/net/ethernet/mscc/ocelot.h +++ b/drivers/net/ethernet/mscc/ocelot.h @@ -92,7 +92,7 @@ int ocelot_mact_learn(struct ocelot *ocelot, int port, int ocelot_mact_forget(struct ocelot *ocelot, const unsigned char mac[ETH_ALEN], unsigned int vid); struct net_device *ocelot_port_to_netdev(struct ocelot *ocelot, int port); -int ocelot_netdev_to_port(struct net_device *dev); +int ocelot_netdev_to_port(struct ocelot *ocelot, struct net_device *dev); =20 int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *targ= et, struct device_node *portnp); diff --git a/drivers/net/ethernet/mscc/ocelot_flower.c b/drivers/net/ethern= et/mscc/ocelot_flower.c index 844292eb7422..0c3aa61c1413 100644 --- a/drivers/net/ethernet/mscc/ocelot_flower.c +++ b/drivers/net/ethernet/mscc/ocelot_flower.c @@ -234,7 +234,7 @@ ocelot_flower_parse_egress_port(struct ocelot *ocelot, = struct flow_cls_offload * struct netlink_ext_ack *extack) { const char *act_string =3D mirror ? "mirror" : "redirect"; - int egress_port =3D ocelot->ops->netdev_to_port(a->dev); + int egress_port =3D ocelot->ops->netdev_to_port(ocelot, a->dev); enum flow_action_id offloadable_act_id; =20 offloadable_act_id =3D mirror ? FLOW_ACTION_MIRRED : FLOW_ACTION_REDIRECT; @@ -580,7 +580,7 @@ static int ocelot_flower_parse_indev(struct ocelot *oce= lot, int port, return -ENOENT; } =20 - ingress_port =3D ocelot->ops->netdev_to_port(indev); + ingress_port =3D ocelot->ops->netdev_to_port(ocelot, indev); if (ingress_port < 0) { NL_SET_ERR_MSG_MOD(extack, "Can only offload an ocelot ingress port"); diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/= mscc/ocelot_net.c index 1b8269320464..d2e96d065dc4 100644 --- a/drivers/net/ethernet/mscc/ocelot_net.c +++ b/drivers/net/ethernet/mscc/ocelot_net.c @@ -984,7 +984,7 @@ static bool ocelot_netdevice_dev_check(const struct net= _device *dev) return dev->netdev_ops =3D=3D &ocelot_port_netdev_ops; } =20 -int ocelot_netdev_to_port(struct net_device *dev) +int ocelot_netdev_to_port(struct ocelot *ocelot, struct net_device *dev) { struct ocelot_port_private *priv; =20 diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h index 48d6deb3efd7..05a8191b148e 100644 --- a/include/soc/mscc/ocelot.h +++ b/include/soc/mscc/ocelot.h @@ -650,7 +650,7 @@ struct device_node; =20 struct ocelot_ops { struct net_device *(*port_to_netdev)(struct ocelot *ocelot, int port); - int (*netdev_to_port)(struct net_device *dev); + int (*netdev_to_port)(struct ocelot *ocelot, struct net_device *dev); int (*reset)(struct ocelot *ocelot); u16 (*wm_enc)(u16 value); u16 (*wm_dec)(u16 value); --=20 2.53.0