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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 CF029C43142 for ; Thu, 2 Aug 2018 13:05:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86F8321501 for ; Thu, 2 Aug 2018 13:05:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Yt9o5aRe" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 86F8321501 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387486AbeHBO4r (ORCPT ); Thu, 2 Aug 2018 10:56:47 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:45335 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732375AbeHBO4r (ORCPT ); Thu, 2 Aug 2018 10:56:47 -0400 Received: by mail-pg1-f195.google.com with SMTP id f1-v6so1151184pgq.12; Thu, 02 Aug 2018 06:05:39 -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=zBzmOkvCtPJSXS69K2mM3UI/NAqUZnzbBQSXeaF6qgc=; b=Yt9o5aReIc2r5oDbt7FbKD/N80or2/ZvOknywuP8GdYi3MK/lOK2+Kd4wkXW4vU3gc x4tUWQpwWQLPdPCgZzeUcWPMuDNWZJIq5+XRSm6NZcdFBSz9Ltto6Fg4B7aHOA6kUoRq KjWC4FbOMfqoNDlTeV+uSeHxRoVmbA7vt9ra4ZNOh+vBHtww90vNiXk0E+1ZXkoqghBB CQjHol2+bGatCIJpIKxFx50SabE91JSThpgIrPlF+9f9Zx7594hTmfgi+F3X0rc6VmiY 0Cfz8ZRpyivhkg7KtT+WLF6Ijf/aueUPLqm2uvaRXei0hadrbiu0yf9OaQuovPC0MmWo xdMw== 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=zBzmOkvCtPJSXS69K2mM3UI/NAqUZnzbBQSXeaF6qgc=; b=YGunqbC2ueW0rD9xaCLGZYOCh+FOavzQSizHwZMD7NiGdSIjMN9Hf3aDcksKH0EWAN 1stNNGlREU8wfx6Zx8OlpQGtcjgtdKoafKwg1LzOXRjtvEF79OxWn9VDIvHJ03VFxrDy IQ3iuFqtsbyMoMb3t/cH/Xu+OkyVWPpzNoz7B3juCSWsDTBBg79H5I2KXabCvIs5XhAZ soww9+M6Uxjr22KW0ge/sk4mAOTXFk4kTwyUp4Dv3eVoMIxHAd2K5QIutebqv1kKieK6 yjFsz/MvxBO4HGyGgVf2C9tW0mkBRGEUab2CawPlfUaQ5Y/7bHcMub7A3CvsZpltTqCd GR+Q== X-Gm-Message-State: AOUpUlF5p3PI/EQ3WASl76IvRlCFBAjW8seCehV/s/epT799S51f+fHs H4HPCyfBUpWth+qhaWV+oXw= X-Google-Smtp-Source: AAOMgpezaR/6Fa6FUbAZTB0JoEbGTqGaI0CYuWtN3nNpTlGOWIvP3Ktqb7RwS/lSWx+OQQ8uzmu8VQ== X-Received: by 2002:a65:57c9:: with SMTP id q9-v6mr2784795pgr.128.1533215139588; Thu, 02 Aug 2018 06:05:39 -0700 (PDT) Received: from [192.168.86.235] (c-67-180-167-114.hsd1.ca.comcast.net. [67.180.167.114]) by smtp.gmail.com with ESMTPSA id d19-v6sm7182250pgi.50.2018.08.02.06.05.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 02 Aug 2018 06:05:38 -0700 (PDT) Subject: Re: AW: AW: AW: PROBLEM: Kernel Oops in UDP stack To: Marcel Hellwig , 'Eric Dumazet' , Paolo Abeni , "'davem@davemloft.net'" , "'kuznet@ms2.inr.ac.ru'" , "'yoshfuji@linux-ipv6.org'" , "'andrew@lunn.ch'" Cc: "'netdev@vger.kernel.org'" , "'linux-kernel@vger.kernel.org'" , Matthias Wystrik References: <18092446dfa7435aaa8deaab65afbf23@ZCOM03.mut-group.com> <96753ca4-88fe-aa26-b439-6e22eaf8b524@gmail.com> <9f9d731107594b368504cbbaf698bc3d@ZCOM03.mut-group.com> <225373e97b42e0e5ee6210b329f0bbb94055b651.camel@redhat.com> <7feb4b8950b842469265672f4c7b381d@ZCOM03.mut-group.com> <1ae1b19241734bfaacff082d241932f9@ZCOM03.mut-group.com> From: Eric Dumazet Message-ID: Date: Thu, 2 Aug 2018 06:05:36 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/02/2018 04:02 AM, Marcel Hellwig wrote: > Hi everyone, > > I did three things that evening. > * I created a small dts file, so I could boot a 3.5.7 kernel. > * Ported the pskb_expand_head from 3.5.7 to 3.4.113 > * Ported the whole skbuf.{c,h} file from 3.5.7 to 3.4.113 That seems bold :0) Sorry, we only backport one fix at a time. You can not simply copy whole files from one version to another. > > Sadly enough the second and third one panicked as well, but interestingly not the first one (3.5.7 with a simple dts file). Now the question is: Is something changed outside of the skbuf (maybe in udp.{c,h}?) or is it because the dts uses a different approach of talking to the MAC of the lpc3250? > > I may try a more recent kernel with a dts file (maybe a 4.x.x one), but I think that will be impossible to backport a patch for our 2.6 kernel :( > > If anybody has any more ideas about why the dts kernel does not panic, you're very welcome. > > Mit freundlichen Grüßen / With kind regards > > Marcel Hellwig > B. Sc. Informatik > Entwickler > > m-u-t GmbH > Am Marienhof 2 > 22880 Wedel > Germany > > Phone: +49 4103 9308 - 474 > Fax:   +49 4103 9308 - 99 > mhellwig@mut-group.com > > www.mut-group.com > > Geschäftsführer (Managing Director): Fabian Peters > Amtsgericht Pinneberg (Commercial Register No.): HRB 10304 PI > USt-IdNr. (VAT-No.): DE228275390 > WEEE-Reg-Nr.: DE 72271808 > >