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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 E4C81ECE587 for ; Tue, 1 Oct 2019 18:18:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B17E12168B for ; Tue, 1 Oct 2019 18:18:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bdrIHpJY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732056AbfJASSz (ORCPT ); Tue, 1 Oct 2019 14:18:55 -0400 Received: from mail-pg1-f194.google.com ([209.85.215.194]:41346 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726376AbfJASSy (ORCPT ); Tue, 1 Oct 2019 14:18:54 -0400 Received: by mail-pg1-f194.google.com with SMTP id s1so10233781pgv.8 for ; Tue, 01 Oct 2019 11:18:53 -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=a4e8vEmJ55W4AxATOqmd1PYnjLiZCoOPp99j06eISto=; b=bdrIHpJYS+H8GrAf3T9ymZwgEtfZyvIi5ij5g67Y7cM/jNkTf+Ur0tBavGx6CXTxQi pZToxA6q3a99Vr1QlRC5fIuF69QGy1a3bxhftTp79raLJaawyMmvXMl2QnwksCAi+rw6 cty+qhy2q8sJUzzxC9V3vZc1Lc5actSqQl4gHRrUbt6h1CD0I/Ex47dq+EH0/LAIQWRB d7X9gyhU6mVbhO9KuP1wXE5C6cEd5z/TdQOwK5n236GIZAvnl/76Pa3xCr0RYAi0rEfe RJo7VFjpU2eqiwwal+D7SZIbvUUhZvDi1rwJfbsCYelPB/CpUXT3cLm//S5CCiHIDfoZ pJew== 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=a4e8vEmJ55W4AxATOqmd1PYnjLiZCoOPp99j06eISto=; b=qFOEN/cgMKCl97OWf+01kbh71mNdRoyMe+rvVxiiry0Y3SxLXLKgj0v0AvimaxveZY 7xWVh5hzi6yc2xLaR2CKyCGOHvGyndGbfX5qPrpz6L1/zceObga9zF4mJD5iVHY7PxBb RIM50YwXeQmeXqHqFnJLtPKyreKqa1UUkkYK1Np8GVYRNPCsaSYnOmLOxhMJkF04VB4O bs3PLEgWRcUJ85ft+mCRnx89S+406bNGEEfNjPB3MtqjBAkH4Q+CfI1iIJuXm1Xv6diW 1+w+QFKWqUXHU+XnbWJ6VEZe9jmVzjB535UrwmwCOJLwHNHrlHoBjUjLLxUFPHtxH1OI FaFg== X-Gm-Message-State: APjAAAUYPPkT+Iq0cCqhYTuOf1Vzmm5veY98APD8eUAPgQ/9twAG009Z VWefdXV4k8whPaMFgSi/97I= X-Google-Smtp-Source: APXvYqz3fviYkxSQy3uopnNTmmdjntU1Gb0DLvFMWRRAqVrvKDua4vx2BUgE447x8LEOS4Wsht+lww== X-Received: by 2002:a62:64ca:: with SMTP id y193mr29318730pfb.164.1569953932795; Tue, 01 Oct 2019 11:18:52 -0700 (PDT) Received: from ?IPv6:2620:15c:2c1:200:55c7:81e6:c7d8:94b? ([2620:15c:2c1:200:55c7:81e6:c7d8:94b]) by smtp.gmail.com with ESMTPSA id w11sm18202297pfd.116.2019.10.01.11.18.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Oct 2019 11:18:51 -0700 (PDT) Subject: Re: [PATCH net v2] ipv6: Handle race in addrconf_dad_work To: David Ahern , davem@davemloft.net, jakub.kicinski@netronome.com Cc: netdev@vger.kernel.org, rajendra.dendukuri@broadcom.com, David Ahern References: <20191001032834.5330-1-dsahern@kernel.org> From: Eric Dumazet Message-ID: <1ab3e0d0-fb37-d367-fd5f-c6b3262b6583@gmail.com> Date: Tue, 1 Oct 2019 11:18:49 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20191001032834.5330-1-dsahern@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 9/30/19 8:28 PM, David Ahern wrote: > From: David Ahern > > Rajendra reported a kernel panic when a link was taken down: > > [ 6870.263084] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 > [ 6870.271856] IP: [] __ipv6_ifa_notify+0x154/0x290 > > > Reviewed-by: Eric Dumazet Thanks !