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=-5.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 1D037C10F03 for ; Wed, 13 Mar 2019 18:26:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E52992075C for ; Wed, 13 Mar 2019 18:26:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=hartkopp.net header.i=@hartkopp.net header.b="cKsT6Usn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726927AbfCMS0v (ORCPT ); Wed, 13 Mar 2019 14:26:51 -0400 Received: from mo4-p01-ob.smtp.rzone.de ([85.215.255.54]:13382 "EHLO mo4-p01-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725876AbfCMS0v (ORCPT ); Wed, 13 Mar 2019 14:26:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1552501606; s=strato-dkim-0002; d=hartkopp.net; h=In-Reply-To:Date:Message-ID:From:References:Cc:To:Subject: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=CsO3IVsBV4ObPCD8pXlkFLTUcwLT59U2Xe+Oa9Achqo=; b=cKsT6UsnwJpQJ9g04PvvXa5vV7bjdWiMYAkxvYKVzIKHCL9sOSn10MmyZnjCc++H20 y9VnH4t/WeDgNEaYz6ekQ+6SvFuq8cMWuyDkVBLtKrx426QgBF1lwUtukpjoPq5ZYYue vtSdtCvPHcNkQ7JCI1xGUWFdW3qLvf4MR4v87iJrGbDbS30M/5NODEVDf4TdDdn+dAAW FgHZ/EK3lNLDr3QGJXujUo16CmGqtDIVYtQGyMcf6LsJyfp83jNoDNWsPAKWr5QnJ2BY kP918qROJlAIzEo6rkJ61l2zgrsZo4NiceucU/masZl8FSo37RLNJDVTB15lVvNt1uyL redg== X-RZG-AUTH: ":P2MHfkW8eP4Mre39l357AZT/I7AY/7nT2yrDxb8mjG14FZxedJy6qgO1onXMaVuOBdyp/nutbxfg" X-RZG-CLASS-ID: mo00 Received: from [192.168.1.119] by smtp.strato.de (RZmta 44.15 AUTH) with ESMTPSA id 307bb7v2DIMx2JG (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Wed, 13 Mar 2019 19:22:59 +0100 (CET) Subject: Re: WARNING in hsr_forward_skb To: Dmitry Vyukov Cc: syzbot , arvid.brodin@alten.se, Jens Axboe , Jens Axboe , David Miller , Christoph Hellwig , linux-block@vger.kernel.org, linux-can@vger.kernel.org, LKML , Ming Lei , Marc Kleine-Budde , netdev , syzkaller-bugs References: <0000000000004cfa120583e1dfc3@google.com> <7dd5ffca-803d-9d5e-7fa4-f9eed2249d26@hartkopp.net> From: Oliver Hartkopp Message-ID: Date: Wed, 13 Mar 2019 19:22:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed 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 Hi Dimitry, On 3/12/19 5:21 PM, Dmitry Vyukov wrote: >> You can see how bisection progressed and got to 4.12.0-rc2+ in the >> bisection log. >> >> The commit that it come up with looks unrelated. >> I've started collecting such cases at: >> https://github.com/google/syzkaller/issues/1051 >> and added for this case: >> >> ===== >> Bisected to wrong commit. >> Root cause: broken kernel boots, bugs that happen on all tests. >> Boot is broken for several releases with "WARNING in hsr_forward_skb", >> this switches to a bug that happens during every test "INFO: trying to >> register non-static key in can_notifier", which then leads to a >> completely random commit. >> ===== > > Broken boots did not happen here. "WARNING in hsr_forward_skb" is the > crash that we pursued, so it started correctly. But then diverged to > an unrelated "INFO: trying to register non-static key in > can_notifier". Thanks for the clarification! I really appreciate your effort with syzbot! Best, Oliver