Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp2698555imu; Mon, 17 Dec 2018 06:27:46 -0800 (PST) X-Google-Smtp-Source: AFSGD/WYQktlT3XlcZFY90M4t+m0sENdvEPDL9y0KafsfZxhJ03edev0FE6DXTazgVdVqOqOD44b X-Received: by 2002:a63:111c:: with SMTP id g28mr12247668pgl.85.1545056866163; Mon, 17 Dec 2018 06:27:46 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1545056866; cv=none; d=google.com; s=arc-20160816; b=YUXcNBVp8TtXzI8XTxnNE50Crha1kqzJ9Jd7tgpWUz1jeEvJX+IviBLSIboh+wam3P j4DQHSgBe2rF3kyHYtqqpSW2h+QlkXO8sSTUsr5Udu5Oc+kh3T9bUIQjybgzt1k7+Bkh 2Am7kO4i0DORMMHheVo23bH57hkhB2hpC1GehYoJyHiS8btDG1ONmoY9GKt09+sgW+fl O8i6ld0dq80+JeI8381V63eABajhfZCkoIET21oVQqetAmoE4hlObKanIFP5VyspM6gI dYHHdaWphDEUCbLjlD80evyLOPZyRHOGBhFR9voqbsw82hGrki6663Z6oCVeYlXzeOT8 O/ag== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject; bh=gLBUWFnDXpqOeHPtH7M9Zq3Ex/sAEz1+QWciWY5e7N4=; b=MM/aDqDTZgip4cBzVE2JU96xjT96/yDJBjmaBR2SVqxa/yqRDZ0vpHcXpO5+uYytUl Fnrf4k2AWr9rXnd2hZbbgaMz4jqdGkZ8dAk3DsJtnJ+9zzBQ3HPbcdi54r+42fTxe5Kh gWrkz2O4g4oaignUqZaqVuK4uRXOQIO9/O76Gm+2yrySzJvGzaug3/AbyzGYbWnpJ7MZ iFghxNetn7ITwrA8SAMJ1kpLbEYFd0xJxC96VyLRowExnrqBSchMu779XaMhhgWX71g/ HUkaRgOs2CUE4+6ASgYmMErYMlmdj3zSo91qYpVguSlOW0W/uFvw1EcQmnvWk061GuQn pf7g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 76si11352118pfw.66.2018.12.17.06.27.31; Mon, 17 Dec 2018 06:27:46 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387496AbeLQOOP (ORCPT + 99 others); Mon, 17 Dec 2018 09:14:15 -0500 Received: from mga01.intel.com ([192.55.52.88]:11513 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732120AbeLQOOO (ORCPT ); Mon, 17 Dec 2018 09:14:14 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Dec 2018 06:14:13 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,365,1539673200"; d="scan'208";a="260130501" Received: from avandeve-mobl.amr.corp.intel.com (HELO [10.251.10.185]) ([10.251.10.185]) by orsmga004.jf.intel.com with ESMTP; 17 Dec 2018 06:14:13 -0800 Subject: Re: WARNING in __rcu_read_unlock To: paulmck@linux.ibm.com, Dmitry Vyukov Cc: syzbot , Andrew Morton , Josh Triplett , LKML , Ingo Molnar , syzkaller-bugs , netdev References: <0000000000005e47a2057d0edc49@google.com> <20181216190412.GE4170@linux.ibm.com> <20181217112916.GG4170@linux.ibm.com> From: Arjan van de Ven Message-ID: <1583d5fc-34bf-3a81-363d-01a1085a7363@linux.intel.com> Date: Mon, 17 Dec 2018 06:14:13 -0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20181217112916.GG4170@linux.ibm.com> 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 On 12/17/2018 3:29 AM, Paul E. McKenney wrote: > As does this sort of report on a line that contains simple integer > arithmetic and boolean operations.;-) > > Any chance of a bisection? btw this looks like something caused a stack overflow and thus all the weirdness that then happens