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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 2AA31C3A59B for ; Sat, 17 Aug 2019 07:16:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E70C62173B for ; Sat, 17 Aug 2019 07:16:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566026174; bh=CE4AEJvu5Hekiw/HsMR351wf16SY1xY2kqztonk4go4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=f8gk1LhHA53vMoidQDyXpXUNff0fCNiXBE6/KKLlthM7zWhV4Ula3/X/8ixKaVZhJ GSXEaMRGwDafzbzYG9SniUZXxEWpo0nn8cuC2lpoU8KhHIr18CVBAx7JA0y0T+ReWo KbQGaqSgMofTL36FsbcaUMXPzqJj8MP9T0MdYbcw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726002AbfHQHP4 (ORCPT ); Sat, 17 Aug 2019 03:15:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:53194 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725267AbfHQHPz (ORCPT ); Sat, 17 Aug 2019 03:15:55 -0400 Received: from localhost (unknown [171.76.122.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CB55720880; Sat, 17 Aug 2019 07:15:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566026154; bh=CE4AEJvu5Hekiw/HsMR351wf16SY1xY2kqztonk4go4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=bnEjnPLgiNNg4bURqzWsb9i5145OE7C6QHYiRcq9EdT0yPJ8vUQtjv10TeCB+SrMz 2rE6kZ56/Y8k+9yaDfDXB9ztHZALG5d+HI4LAKcrt8x8PGUGZD6gtmaUpy5xLa9qTA 1K8U3xu2c9cLnkmq15mkyDvWfsOQVY9VuCz7d3bU= Date: Sat, 17 Aug 2019 12:44:40 +0530 From: Vinod Koul To: Srinivas Kandagatla Cc: syzbot , alsa-devel@alsa-project.org, bp@alien8.de, gregkh@linuxfoundation.org, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, nstange@suse.de, pierre-louis.bossart@linux.intel.com, sanyog.r.kale@intel.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org, yakui.zhao@intel.com Subject: Re: INFO: rcu detected stall in __do_softirq Message-ID: <20190817071440.GD12733@vkoul-mobl.Dlink> References: <000000000000b4126c059030cfb6@google.com> <63c0dc1e-323d-d46e-2d4a-b5b6d6916042@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <63c0dc1e-323d-d46e-2d4a-b5b6d6916042@linaro.org> User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 16-08-19, 09:55, Srinivas Kandagatla wrote: > > > On 16/08/2019 01:10, syzbot wrote: > > syzbot has bisected this bug to: > > > > commit 2aeac95d1a4cc85aae57ab842d5c3340df0f817f > > Author: Srinivas Kandagatla > > Date:   Tue Jun 11 10:40:41 2019 +0000 > > > >     soundwire: add module_sdw_driver helper macro > > Not sure how adding a macro with no users triggers this rcu stall. And config used doesn't have soundwire set :D > > BTW this was in mainline since rc1. This is caused by something else! > > --srini > > > > > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=114b45ee600000 > > start commit:   882e8691 Add linux-next specific files for 20190801 > > git tree:       linux-next > > final crash:    https://syzkaller.appspot.com/x/report.txt?x=134b45ee600000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=154b45ee600000 > > kernel config:  https://syzkaller.appspot.com/x/.config?x=466b331af3f34e94 > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=6593c6b8c8b66a07cd98 > > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16b216b2600000 > > > > Reported-by: syzbot+6593c6b8c8b66a07cd98@syzkaller.appspotmail.com > > Fixes: 2aeac95d1a4c ("soundwire: add module_sdw_driver helper macro") > > > > For information about bisection process see: > > https://goo.gl/tpsmEJ#bisection -- ~Vinod