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=-5.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 9EFBDC43457 for ; Thu, 8 Oct 2020 19:07:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4228E207DE for ; Thu, 8 Oct 2020 19:07:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Oq8I0r8E" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729534AbgJHTHG (ORCPT ); Thu, 8 Oct 2020 15:07:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725887AbgJHTHG (ORCPT ); Thu, 8 Oct 2020 15:07:06 -0400 Received: from mail-wr1-x442.google.com (mail-wr1-x442.google.com [IPv6:2a00:1450:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E75E6C061755 for ; Thu, 8 Oct 2020 12:07:05 -0700 (PDT) Received: by mail-wr1-x442.google.com with SMTP id n6so7487741wrm.13 for ; Thu, 08 Oct 2020 12:07:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=J9wzXe0Mwlk1Aa+2RHj0fspLww1O4qz/bqm01VadWAY=; b=Oq8I0r8E4FxOTTfrAZHNLQlxeb4jLWlRfTP1rrrcVfNMa6h8NWqf46waLyPkt7ywgx cMj6gIX7juEg0GeQGwc+AxtTUW7YwGPxb4j54/hcFMHmtEvU0s13rVRbX1dQsrff4Vto ecqOGI8vtM14WcZQWa+WyP7uZaIIc85ligTKqI5ShTzHHuHsrNoZhSboHONt9sYu4B/v ozZoF9bvRwsgnaBzUS9dAqve+TzIMsqWSKgSfl5iyAuV2/pn5Hz8Agv6PbcSWJTswVAK H9LbREnfMlxpyBn8zWi6koeLZ+7UvaFIfRKBGTGOghV4uJJHUdO/cyp4FkXXM2ARiRfF aWxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=J9wzXe0Mwlk1Aa+2RHj0fspLww1O4qz/bqm01VadWAY=; b=Trsmg83tSKP2sH2sQRha1QfwojUNQNkkXu5TJ/UnvUPp9mJ5MtYL30JOQ8HE7wTNxJ i0jltPFjABFj4HGCGxAh8VMsX4uYEgPbDUjFHM2t3W3GDs+ck5WMWoInh41g0mIuhg8g NFWNpj3SKSX6CqsCVnZWNCG+lshinXCbxTVoAybBEwRI1tUskd7zFxOUnvY7V05qTzre q+pUEiHqUk3Ci5niAF1s8Is7ml512fGyL1yQe+j4M+zJIGksWF/D7A3H07kKkI8b1Wgj u+5RmoEQTR2lyRjLUZG6U5A8l9rCWsohQUL4+CZ8oPAdGyQ3KUn679bgu215qZzto+5u U2OA== X-Gm-Message-State: AOAM5330CoOVubGpuWALeAWFnBGt316fhxjaR+sutu22F55KOAST+dzH oQbjvS6ORxgQp1x6cUJDsVd3OKdwIwY= X-Google-Smtp-Source: ABdhPJwQZ+UVQmhjS7cgS2AQXOFdJ0QXY0kIthuClO+FpHBf1wEgm2UZA6kA/zI3ui8m8pn+rW1HTg== X-Received: by 2002:a5d:4e8d:: with SMTP id e13mr10906739wru.368.1602184024257; Thu, 08 Oct 2020 12:07:04 -0700 (PDT) Received: from [192.168.8.147] ([37.165.121.66]) by smtp.gmail.com with ESMTPSA id d23sm8170777wmb.6.2020.10.08.12.07.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 08 Oct 2020 12:07:03 -0700 (PDT) Subject: Re: [Bug 209423] WARN_ON_ONCE() at rtl8169_tso_csum_v2() To: Eric Dumazet , Heiner Kallweit Cc: "netdev@vger.kernel.org" References: <80adc922-f667-a1ab-35a6-02bf1acfd5a1@gmail.com> <733a6e54-f03c-0076-1bdc-9b0d4ec1038c@gmail.com> <9e4b2b1f-c2d9-dbd0-c7ce-49007ddd7af2@gmail.com> <77541223-8eaf-512c-1930-558e8d23eb33@gmail.com> From: Eric Dumazet Message-ID: Date: Thu, 8 Oct 2020 21:07:02 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 10/8/20 8:50 PM, Eric Dumazet wrote: > > > OK, it would be nice to know what is the input interface > > if4 -> look at "ip link | grep 4:" > > Then identifying the driver that built such a strange packet (32000 > bytes allocated in skb->head) > > ethtool -i ifname > According to https://bugzilla.kernel.org/show_bug.cgi?id=209423 iif4 is the tun200 interface used by openvpn. So this might be a tun bug, or lack of proper SKB_GSO_DODGY validation in our stack for buggy/malicious packets.