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 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 90070C28CF6 for ; Wed, 1 Aug 2018 10:20:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 418FE20685 for ; Wed, 1 Aug 2018 10:20:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MYqlshRw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 418FE20685 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 S2387593AbeHAMFb (ORCPT ); Wed, 1 Aug 2018 08:05:31 -0400 Received: from mail-pf1-f179.google.com ([209.85.210.179]:45833 "EHLO mail-pf1-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387546AbeHAMFa (ORCPT ); Wed, 1 Aug 2018 08:05:30 -0400 Received: by mail-pf1-f179.google.com with SMTP id i26-v6so7617047pfo.12; Wed, 01 Aug 2018 03:20:27 -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=6KjirQVM6cBNUYCJLvqWr+4AdudTfyXZbBWrDpsNR8s=; b=MYqlshRwrGcrwockuqRcu/iUJIJeTO/uXdy5mYD58cw05srnEGAlnUfB0PuwOaZXY5 ISux7LBA3FD8ZU26I1wYk109GydmHdvM1n1qq5ul0hOOdB4Ka7G9j+Sk7W63TqffcFLC c5Eyqq9GqC8UePCXdodjWBB8mKBW/+u5FtPxmCO9+uVCF9vwLs0Zd6PBtIHalrh2pD7i 1DWf8EQDciia0C8R5AGJPwlDPQCvdZOEzTSiYPZzARc+Q8KSozQBbG5igBEcY1mkuzck F2QjYff6hbP7Pin2Ai5IH9dQB3O9frwSOTIuk3YuVtF+rWDtsWaffnavkEgIiJ4CaWOg 9+rg== 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=6KjirQVM6cBNUYCJLvqWr+4AdudTfyXZbBWrDpsNR8s=; b=DAvGQUWL4Zj6wEKSjySxmOJ08sfFb99g7X3Cofdbb/2TSu5ursuKvUhLN+yttaABPP XM+P2jXO95VXSkddpG63zC4bg49Arg3/nbRgnO0s4mGOVCPSgCd3gyth/oGaeqbJCIHu lC5Fnc/fSG6MYj590VzDjWqmbvVbUJfwbCKBdCNdued8zA1t2WgjbsO9TDv546L6MPUT FbOl2YsSkNpRU0HbzjjRur8s5kowv8I6RlaNkBArfnZXow9ZjyxkVUjvt8Zz4GfIdD70 bKrXVkNMUzcrEwqYpHsKskh9SX3PvxHSV8jdNPYqw/OdILQUG/Ix6Pg3rVw6t0OXuLMQ skzQ== X-Gm-Message-State: AOUpUlG7XikLLWJfcNUvtwAD+0uo93ZxpstLxSNF8kxNJ2y3qOy0Nfoi fezfUOrj1F7d0qxDUsel0IQ= X-Google-Smtp-Source: AAOMgpcG3OvaGtxVOyn3w0KZhcB4gWw6dz0VN4aKc4AySZY2OB8AihorPAkFw4CzbCTL3wiHge8ZgA== X-Received: by 2002:a63:7007:: with SMTP id l7-v6mr24158899pgc.206.1533118826949; Wed, 01 Aug 2018 03:20:26 -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 r81-v6sm29155301pfa.18.2018.08.01.03.20.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Aug 2018 03:20:25 -0700 (PDT) Subject: Re: AW: PROBLEM: Kernel Oops in UDP stack To: Marcel Hellwig , 'Eric Dumazet' , "'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> From: Eric Dumazet Message-ID: <96753ca4-88fe-aa26-b439-6e22eaf8b524@gmail.com> Date: Wed, 1 Aug 2018 03:20:24 -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: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/31/2018 10:55 PM, Marcel Hellwig wrote: > > [] (udp_recvmsg+0x284/0x33c) from [] (inet_recvmsg+0x38/0x4c): net/ipv4/udp.c:1234 sin->sin_addr.s_addr = ip_hdr(skb)->saddr; Unaligned access trap (virtual address c14fe63a), so either sin or ip_hdr(skb) are not on a 32bit alignment Can you produce the disassembly of the trapping instruction ? (Is is a read at address c14fe63a, or a write ...) Thanks.