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=-7.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_MUTT autolearn=unavailable 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 0A3A9C43218 for ; Tue, 11 Jun 2019 06:59:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D71F62089E for ; Tue, 11 Jun 2019 06:59:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404218AbfFKG7x (ORCPT ); Tue, 11 Jun 2019 02:59:53 -0400 Received: from relay10.mail.gandi.net ([217.70.178.230]:34685 "EHLO relay10.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403874AbfFKG7w (ORCPT ); Tue, 11 Jun 2019 02:59:52 -0400 Received: from localhost (unknown [37.205.120.66]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay10.mail.gandi.net (Postfix) with ESMTPSA id 5B691240003; Tue, 11 Jun 2019 06:59:44 +0000 (UTC) Date: Tue, 11 Jun 2019 08:59:40 +0200 From: Alexandre Belloni To: Eric Biggers Cc: Alessandro Zummo , Jiwei Sun , linux-rtc@vger.kernel.org, Dmitry Vyukov , syzbot , LKML , syzkaller-bugs Subject: Re: [rtc] Re: BUG: workqueue lockup (4) Message-ID: <20190611065940.GI25472@piout.net> References: <0000000000005764090577a27486@google.com> <20181007193918.GC32272@piout.net> <20190610234959.GB220379@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190610234959.GB220379@gmail.com> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/06/2019 16:49:59-0700, Eric Biggers wrote: > On Sun, Oct 07, 2018 at 09:39:18PM +0200, Alexandre Belloni wrote: > > Hi, > > > > On 07/10/2018 14:18:31+0200, Dmitry Vyukov wrote: > > > On Sun, Oct 7, 2018 at 2:15 PM, syzbot > > > wrote: > > > > Hello, > > > > > > > > syzbot found the following crash on: > > > > > > > > HEAD commit: c1d84a1b42ef Merge git://git.kernel.org/pub/scm/linux/kern.. > > > > git tree: upstream > > > > console output: https://syzkaller.appspot.com/x/log.txt?x=14c5f491400000 > > > > kernel config: https://syzkaller.appspot.com/x/.config?x=c0af03fe452b65fb > > > > dashboard link: https://syzkaller.appspot.com/bug?extid=08116743f8ad6f9a6de7 > > > > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14514a6e400000 > > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1025ebb9400000 > > > > > > The reproducer seems to be all about rtc. So +rtc maintainers. > > > > > > > It seems to be that bug: > > http://patchwork.ozlabs.org/patch/898552/ > > > > I'm pretty sure the fix is not correct though and didn't have the time > > to work on a proper fix. > > > > Is there any plan to actually fix this? Because this bug is still open, syzbot > isn't able to report "workqueue lockup" bugs elsewhere in the kernel. > This is still on my radar. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com