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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 439DFC10F0E for ; Fri, 12 Apr 2019 13:21:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1206D2054F for ; Fri, 12 Apr 2019 13:21:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726882AbfDLNVx (ORCPT ); Fri, 12 Apr 2019 09:21:53 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:32862 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726780AbfDLNVx (ORCPT ); Fri, 12 Apr 2019 09:21:53 -0400 X-IronPort-AV: E=Sophos;i="5.60,341,1549926000"; d="scan'208";a="378402087" Received: from vaio-julia.rsr.lip6.fr ([132.227.76.33]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Apr 2019 15:21:51 +0200 Date: Fri, 12 Apr 2019 15:21:42 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Pavel Machek cc: syzbot , Julia.Lawall@lip6.fr, bp@alien8.de, dan.j.williams@intel.com, dave.hansen@linux.intel.com, dave.jiang@intel.com, haozhong.zhang@intel.com, hpa@zytor.com, jacek.anaszewski@gmail.com, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, luto@kernel.org, mingo@redhat.com, pbonzini@redhat.com, peterz@infradead.org, rkrcmar@redhat.com, rpurdie@rpsys.net, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Subject: Re: WARNING in untrack_pfn In-Reply-To: <20190412130112.GA8384@amd> Message-ID: References: <000000000000f70a0e0571ad8ffb@google.com> <0000000000007b03eb058653caea@google.com> <20190412130112.GA8384@amd> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 12 Apr 2019, Pavel Machek wrote: > On Fri 2019-04-12 04:42:01, syzbot wrote: > > syzbot has bisected this bug to: > > > > commit c68729119f4d2993bec3c9cb999ad76de5aeddba > > Author: Julia Lawall > > Date: Sat Jul 15 09:58:19 2017 +0000 > > > > leds: tlc591xx: add missing of_node_put > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12cda0f3200000 > > start commit: 23203e3f Merge branch 'akpm' (patches from Andrew) > > git tree: upstream > > final crash: https://syzkaller.appspot.com/x/report.txt?x=11cda0f3200000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=16cda0f3200000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=861a3573f4e78ba1 > > dashboard link: https://syzkaller.appspot.com/bug?extid=e1a4f80c370d2381e49f > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17836d15400000 > > > > Reported-by: syzbot+e1a4f80c370d2381e49f@syzkaller.appspotmail.com > > Fixes: c68729119f4d ("leds: tlc591xx: add missing of_node_put") > > > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > Can you revert c68729119f4d2993bec3c9cb999ad76de5aeddba on master and > see if it fixes the problem? Because this is hard to believe... Likewise, it seems hard to believe that the change is a problem. But could the problem be elsewhere and triggered by this code? julia > > Pavel > > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html >