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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 257EEC433E6 for ; Sat, 16 Jan 2021 12:21:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA383230FC for ; Sat, 16 Jan 2021 12:21:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726825AbhAPMVZ (ORCPT ); Sat, 16 Jan 2021 07:21:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725979AbhAPMVY (ORCPT ); Sat, 16 Jan 2021 07:21:24 -0500 Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 530A8C061757 for ; Sat, 16 Jan 2021 04:20:38 -0800 (PST) Received: by mail-lj1-x22f.google.com with SMTP id f17so13217002ljg.12 for ; Sat, 16 Jan 2021 04:20:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=waldekranz-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:in-reply-to:references:date:message-id :mime-version; bh=SiWVoM0oRowUoVBZDq1/pucdgIHtbHisa51fOuFjozk=; b=K1H262tNdlEh4VL4V/QmSF7p/PQ6xtsnatw7yxxHuZZkJ2QRRGtNulgmL9tRzpNayU pWAUcD51+MMbXTuoUvOUC1Rk+6ikqx5he1Ca2G763fTGRK2rbBKRGVGuooUc9o9ZeBHX rY18sSo8ZhPWZ5lu5zS3odr47U0ebzX3sCpA/zq4M24JlOiy6WRiOJdRYI0bsnxKmrcl WeU6oS/BMa5dgkq1xJUfKyok8BlgXVbui3b+d7Q82MeUh6aL+zrclq4VvACstkxL72Tc eK5P5LxczmtxqMUOh1KMFQjbwQrXAv32VzTppoIp3y9+SvE0qSYSpV7VUA43W3yOIlun tkmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=SiWVoM0oRowUoVBZDq1/pucdgIHtbHisa51fOuFjozk=; b=hVYimfEg9m0E3iAHSgmNfw7LKAXMGizr1PQ4v1GP0LinpqI6apxepTp7KQqkJiQTfq 5g6vUjW1d25eo5Zuk5Vo1VdHBLofonTBhudk5wKQPxPCCgv0W8afsaT6qHxPKykGcHDF kcNvb1TVLgVlLWk+Lzauza4+P+RSlJlmOSce3flyMQp7meTD9S3jOn9VSfn+HyREYOQO 3SxHCnAn/ADVo6uDv+WqeUtxUZIfCL1Jl8014CczXkfT2uazjqxh4QLejkqFmWm5A39w v63TTJW8T2qerG/xig9ql+Jx+EVKdbSLJCE0Vr3T0ax1oW0ug+S8ozA4yrUt/AQF0TPT LCyw== X-Gm-Message-State: AOAM533O1C/fdfOzbygoC3eYiVJJa9rss7JhzcRV/4D2kCEV1QYxRAnc QLVBPcqcaKH8OJCxvKGEi7IvRFoxGjPHqC0L X-Google-Smtp-Source: ABdhPJx2IXH1z4kY/ISg/EFo/xQaJkbP/mzobHNnrJSUUsNDanTgZLF/sZc7vwYvT0UmJ3fWiUT+Ew== X-Received: by 2002:a2e:97ce:: with SMTP id m14mr7275584ljj.380.1610799635840; Sat, 16 Jan 2021 04:20:35 -0800 (PST) Received: from wkz-x280 (h-236-82.A259.priv.bahnhof.se. [98.128.236.82]) by smtp.gmail.com with ESMTPSA id t4sm1276643lff.260.2021.01.16.04.20.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Jan 2021 04:20:34 -0800 (PST) From: Tobias Waldekranz To: Rasmus Villemoes , Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Jakub Kicinski Cc: Rasmus Villemoes , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net 1/2] net: dsa: mv88e6xxx: also read STU state in mv88e6250_g1_vtu_getnext In-Reply-To: <20210116023937.6225-2-rasmus.villemoes@prevas.dk> References: <20210116023937.6225-1-rasmus.villemoes@prevas.dk> <20210116023937.6225-2-rasmus.villemoes@prevas.dk> Date: Sat, 16 Jan 2021 13:20:33 +0100 Message-ID: <87bldpkr8u.fsf@waldekranz.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 16, 2021 at 03:39, Rasmus Villemoes wrote: > mv88e6xxx_port_vlan_join checks whether the VTU already contains an > entry for the given vid (via mv88e6xxx_vtu_getnext), and if so, merely > changes the relevant .member[] element and loads the updated entry > into the VTU. > > However, at least for the mv88e6250, the on-stack struct > mv88e6xxx_vtu_entry vlan never has its .state[] array explicitly > initialized, neither in mv88e6xxx_port_vlan_join() nor inside the > getnext implementation. So the new entry has random garbage for the > STU bits, breaking VLAN filtering. > > When the VTU entry is initially created, those bits are all zero, and > we should make sure to keep them that way when the entry is updated. > > Fixes: 92307069a96c (net: dsa: mv88e6xxx: Avoid VTU corruption on 6097) > Signed-off-by: Rasmus Villemoes Reviewed-by: Tobias Waldekranz Tested-by: Tobias Waldekranz