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 76A8BC43334 for ; Sat, 4 Jun 2022 16:33:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238903AbiFDQdj (ORCPT ); Sat, 4 Jun 2022 12:33:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238833AbiFDQd0 (ORCPT ); Sat, 4 Jun 2022 12:33:26 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33E743B3C8; Sat, 4 Jun 2022 09:33:04 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id t2so8994795pld.4; Sat, 04 Jun 2022 09:33:04 -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=wPNc3YvhAKuZLbvOFj+YsMRBSINjKQKB6Tw7aOecxnY=; b=bQYjQLTuCYJKhpCbJ5T/6FqYDtp9ytwgZ8GjD77Izl1pWHbfrq1t0TIOUuOcMTbQfC kZhO6u2/8M74+EDu7hTumtCIUT6MFeYzRwOtdN/9fDsFz7fjdF5YRkpDsDF2Ky8/I6VF YdRfETt8XCvyeVaPkJ9hjCRik6toadMEuKTQVS9KJrccA6HJWdpUR0Si0MXp/LgksUpa OF8DEpBNp3JDp3RxVRuDIZOkvLokZR8esKhUOcR5W9bpzfXN2VF/1ca+PnurVfGTOe/f pK+o5YUZ11qbbZDgQZl8sjZ7ZZ4Igva9IwS+ndpPmbR+KpyLOdec7/HbAVXM02OkZC8y rzUQ== 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=wPNc3YvhAKuZLbvOFj+YsMRBSINjKQKB6Tw7aOecxnY=; b=xkx3aoSm9FbftmqHJejXs71WDY0R8HDtEy5OvQB8MDSZPoJW08EMsP4DKhlpQQlMOa 25PCfMMjijzi8sQA91466psbECvuAn49bdeYD2j3hBvhHA9mSNEGxJDYz5K+5OHJkm1P C6fEuYwj0tsJRYweeRTKzBMasy/sSI5aQNjUHJ0jrQZjYuL6DVOthQprUAwx78TCKQzE YqltWFYwVOu98PQzv8X4S1mZW4W3euTQx/EhvEGM2rqkWrZoQuCehe+E7e1K0E5O9Atz AAfStjXXpiXkxhpw43uCM5zhdeS+ioNZOumLY1eVTZZD7Q+agqQWeCgAHWlTF9MLy67/ yIIA== X-Gm-Message-State: AOAM533ee6Y9ZD8Dsfxz3m0P1oWwZ4rXCCDOwv8ZXY4VmAEYHK53ubWe frxBiwArjXXna1yqYUYCGFA= X-Google-Smtp-Source: ABdhPJwuG7ubgnGbDsxUh+u5eJBPGs3nl1VlPuP1FfhFtzokvX7WVAYT3KXphfY7egXNVX/o4trgqw== X-Received: by 2002:a17:902:a706:b0:163:f77b:10e0 with SMTP id w6-20020a170902a70600b00163f77b10e0mr15923266plq.96.1654360383634; Sat, 04 Jun 2022 09:33:03 -0700 (PDT) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id t8-20020a17090a3b4800b001e34b5ed5a7sm8424874pjf.35.2022.06.04.09.33.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Jun 2022 09:33:03 -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 v5 7/7] can: skb: drop tx skb if in listen only mode Date: Sun, 5 Jun 2022 01:30:00 +0900 Message-Id: <20220604163000.211077-8-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220604163000.211077-1-mailhol.vincent@wanadoo.fr> References: <20220513142355.250389-1-mailhol.vincent@wanadoo.fr> <20220604163000.211077-1-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 so, 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 dc9da76c0470..8bb62dd864c8 100644 --- a/drivers/net/can/dev/skb.c +++ b/drivers/net/can/dev/skb.c @@ -5,6 +5,7 @@ */ #include +#include #include #define MOD_DESC "CAN device driver interface" @@ -293,6 +294,7 @@ 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 || @@ -306,8 +308,13 @@ 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