From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CB66C433F5 for ; Sat, 14 May 2022 14:18:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233165AbiENOSJ (ORCPT ); Sat, 14 May 2022 10:18:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233188AbiENOR4 (ORCPT ); Sat, 14 May 2022 10:17:56 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F37E0DFE9; Sat, 14 May 2022 07:17:42 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id b12so1138365pju.3; Sat, 14 May 2022 07:17:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZEhSGoMoojYAD36SANNLcism31dWp4f4Nf5+aItJuTY=; b=jbklFPhslW+4+HkKyrtVXePxSFmMiySYB9NlkM82qwUxV8msgdLqyTMXdM5J1D4Sj3 ee47pqFiYwtIU5YThhtubn4Xepiuv3+7H1I83C3XZV6H1nFWvUm3RnPZ5TNjUj+hfoq9 G4W+V62LmFEBFcc8Qkn2M8/ai4vSycDl7R/rfvkYvg359NOM7aUrW7kYA6QVM8vebaH8 0c2kVrNGpB5WMhFGulffw2N8wwhSTwgZpJYTsgVVKocnLBinHyXR4PLcc1lc6rvbY+gp kc9tWTnBCojyNcT41fq6r6eRMfexRZ9Bqf+WdfcICVefWdyxaVwJNOis3qhjbbxMltva BN2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=ZEhSGoMoojYAD36SANNLcism31dWp4f4Nf5+aItJuTY=; b=PRZAyr4lvlZ9TTPN6qoNbCAL0dz9enMw0R7T9V2qzBi1ZVZJJDglZkBBaJKmz4KMQ7 fclA4oEbIAI/qfQ3E/CrE76TgazbaP7DbbXT649b5El/QaFXJ334S4ET1psw+EvkbKiv ujSR6mTykx55WoPCCQxnpLddK4NiZ+vvvssX9OrVyjkhbMsr/FijPAxRyZVP/prVZ38d Q4r6Z+gTSjZ7aiEWxqMjcRPAJyF5NXaBVtVsWpm4UxfcKPRbMxBbbRn3OUgfBcsMvMK/ G9YPtNZfVhUUXAI/HmcrF6JdWmJyNdJoNk0MRwfvfgGgrleDXZ1HWiSc7NRLqmCSctrR GmQQ== X-Gm-Message-State: AOAM531NPEa234VDX+YOWkNWHZbeOlGUHYYHm/vxFaMJKmiAVB2dEaO7 1KIfwNactg+GYttW5om0lGE= X-Google-Smtp-Source: ABdhPJzUSRBGx8S6BfJhi0bU2llugcyFbguZzUWUlbDGCnMW6DC9OHT0oX2pZFcdesE+mCKW/C6CxA== X-Received: by 2002:a17:90b:4a4a:b0:1dc:4731:31a4 with SMTP id lb10-20020a17090b4a4a00b001dc473131a4mr10171413pjb.19.1652537862493; Sat, 14 May 2022 07:17:42 -0700 (PDT) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id x8-20020a17090a530800b001cd4989feccsm5298541pjh.24.2022.05.14.07.17.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 May 2022 07:17:42 -0700 (PDT) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde Cc: linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, Max Staudt , Oliver Hartkopp , netdev@vger.kernel.org, Vincent Mailhol Subject: [PATCH v3 4/4] can: dev: drop tx skb if in listen only mode Date: Sat, 14 May 2022 23:16:50 +0900 Message-Id: <20220514141650.1109542-5-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220514141650.1109542-1-mailhol.vincent@wanadoo.fr> References: <20220513142355.250389-1-mailhol.vincent@wanadoo.fr> <20220514141650.1109542-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org Frames can be directly injected to a can driver via the packet socket. By doing that, it is possible to reach the net_device_ops::ndo_start_xmit function even if the driver is configured in listen only mode. Add a check in can_dropped_invalid_skb() to discard the skb if CAN_CTRLMODE_LISTENONLY is set. Signed-off-by: Vincent Mailhol --- drivers/net/can/dev/skb.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/dev/skb.c b/drivers/net/can/dev/skb.c index 8b1991130de5..f7420fc43b99 100644 --- a/drivers/net/can/dev/skb.c +++ b/drivers/net/can/dev/skb.c @@ -5,6 +5,7 @@ */ #include +#include /* Local echo of CAN messages * @@ -286,6 +287,7 @@ static bool can_skb_headroom_valid(struct net_device *dev, struct sk_buff *skb) bool can_dropped_invalid_skb(struct net_device *dev, struct sk_buff *skb) { const struct canfd_frame *cfd = (struct canfd_frame *)skb->data; + struct can_priv *priv = netdev_priv(dev); if (skb->protocol == htons(ETH_P_CAN)) { if (unlikely(skb->len != CAN_MTU || @@ -299,8 +301,13 @@ bool can_dropped_invalid_skb(struct net_device *dev, struct sk_buff *skb) goto inval_skb; } - if (!can_skb_headroom_valid(dev, skb)) + if (!can_skb_headroom_valid(dev, skb)) { + goto inval_skb; + } else if (priv->ctrlmode & CAN_CTRLMODE_LISTENONLY) { + netdev_info_once(dev, + "interface in listen only mode, dropping skb\n"); goto inval_skb; + } return false; -- 2.35.1