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 5A745C46467 for ; Mon, 24 Jan 2022 23:48:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2364332AbiAXXrX (ORCPT ); Mon, 24 Jan 2022 18:47:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356410AbiAXWz7 (ORCPT ); Mon, 24 Jan 2022 17:55:59 -0500 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28C87C0680BB for ; Mon, 24 Jan 2022 13:10:05 -0800 (PST) Received: by mail-lf1-x12e.google.com with SMTP id b9so3520446lfq.6 for ; Mon, 24 Jan 2022 13:10:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=waldekranz-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:organization:content-transfer-encoding; bh=1xnQF9bLGcpqpvgeBQWxaXO0sby0WkycSwLqzj4kn+w=; b=Ng7RNB8+owqz2sMnqb+D3YKugbGxUS2d4ZMSn0kKJiuCLTY/mLNqhonMbkCvT6pNgx S/YOAAiZ3S6M7RER960DQBd6IePRtB12JLMvyDgw9mdahFFJtw39naV20if2MpmNfdty ykJax6Ty3jejql0vgStXaZ0v7OQt9AsAXmwQTpjqm+DaWnlGLgzy678Jx4GVmUjIyraB +OOuO+azoZgnKz3dcfra6lXZqv1CYnQMe1vqnYyUVkx63qwr/XOWC+qA3Nh6OfNxQOd2 1yRH3w+IqhQRnN4I1WqY+9if/oFhxhoqzybaP25gLt0Z7iWoNybnkENrFj+BNumSkhOg l5Rg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:organization:content-transfer-encoding; bh=1xnQF9bLGcpqpvgeBQWxaXO0sby0WkycSwLqzj4kn+w=; b=2SHlgpnpdVWSygE/8yiTTNEPSLyy73YsuT8heostyMfW/DM9y1Dg1WV8KiNQQz1KZa +y99EA+lsK4JLkjmRN3zWOo9V0vTVI3MDgHGGb9Wmj6sYWvqmgl9T2VuxAfIFEqNIYwc 3scF5HOw52kMtPgPmNqQmtJza6qhihLuftRdF/ysflt2+IpuOElalESDSahkRFfBwCHs 1vNLT0LT5cc99KGGLeSabk0/6aFSPDB/F0J6dexfE+jHvwkIGACAbMJrg8WxpNM3LacR QeDWUpWK/vGxOwg7KxaqjQ8XvPTqNu/Xy0l5Zyj+jSQr7mLStHNPUwUWarUHVbVoZJWl qfAw== X-Gm-Message-State: AOAM532dGVniipW4f689XJqxKtY7eapccRhbrw6VnUjRPLHK15ptiDhF Y2ssyWJGX4E3QrZWcku7/k2FxQ== X-Google-Smtp-Source: ABdhPJwfE3A4W4S/oUX8Zs78yXqD+R3+6wSR9G234+TTwq7Sz7sfOUAV7oAU3AhIfLvwjpCjsmWiqQ== X-Received: by 2002:a19:ae05:: with SMTP id f5mr435716lfc.496.1643058603513; Mon, 24 Jan 2022 13:10:03 -0800 (PST) Received: from veiron.westermo.com (static-193-12-47-89.cust.tele2.se. [193.12.47.89]) by smtp.gmail.com with ESMTPSA id t12sm1009115ljj.118.2022.01.24.13.10.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jan 2022 13:10:03 -0800 (PST) From: Tobias Waldekranz To: davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , linux-kernel@vger.kernel.org Subject: [PATCH net 2/2] net: dsa: Avoid cross-chip syncing of VLAN filtering Date: Mon, 24 Jan 2022 22:09:44 +0100 Message-Id: <20220124210944.3749235-3-tobias@waldekranz.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220124210944.3749235-1-tobias@waldekranz.com> References: <20220124210944.3749235-1-tobias@waldekranz.com> MIME-Version: 1.0 Organization: Westermo Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changes to VLAN filtering are not applicable to cross-chip notifications. On a system like this: .-----. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-' '-1-2-' '-1-2-' Before this change, upon sw1p1 leaving a bridge, a call to dsa_port_vlan_filtering would also be made to sw2p1 and sw3p1. In this scenario: .---------. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-3-4-' '-1-2-' '-1-2-' When sw1p4 would leave a bridge, dsa_port_vlan_filtering would be called for sw2 and sw3 with a non-existing port - leading to array out-of-bounds accesses and crashes on mv88e6xxx. Fixes: d371b7c92d19 ("net: dsa: Unset vlan_filtering when ports leave the bridge") Signed-off-by: Tobias Waldekranz --- net/dsa/switch.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/dsa/switch.c b/net/dsa/switch.c index 9f9b70d6070a..517cc83d13cc 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -180,9 +180,11 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds, info->sw_index, info->port, info->bridge); - err = dsa_switch_sync_vlan_filtering(ds, info); - if (err) - return err; + if (ds->dst->index == info->tree_index && ds->index == info->sw_index) { + err = dsa_switch_sync_vlan_filtering(ds, info); + if (err) + return err; + } return dsa_tag_8021q_bridge_leave(ds, info); } -- 2.25.1