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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB22EC433EF for ; Wed, 23 Mar 2022 01:55:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240918AbiCWB45 (ORCPT ); Tue, 22 Mar 2022 21:56:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240907AbiCWB4x (ORCPT ); Tue, 22 Mar 2022 21:56:53 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 540835621F for ; Tue, 22 Mar 2022 18:55:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A4E0D61465 for ; Wed, 23 Mar 2022 01:55:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89537C340EC; Wed, 23 Mar 2022 01:55:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1648000524; bh=kSCpaZcs6hkCplY9uGNsf2FJl2K9ZAY3Artf7nx/gh4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=UDkkIC8qCfqNXvOhBliX16ZFmvwqMnHs7g//69mXSFegupyNnnUm7oZEWXPQVom0d NUN/kGRbOMAx8Q5h25oh0rhmk2ybJ+VhqIoHiP3Pg6eEhIjoREiGcpbcf5bxsX6UWb VgqqWSB1b2y5GKRaLzoSfNVFhX9DH5nye3HogFr+vAaQ84OFMSOrEqjxyowMUTSVpv SFL90xpWi0hjORb+xyhfmMVSpVLXGvvVjU7hNmT7OeIuIEGTWrjLU1Pdj7iIDpS+S2 3nnKwZruLijlRN7Vp+CjxIrVLV9MR0YJsZ5UzpQ6R9ln36C2+bG73dDx35ctjTRFJB GVEY4g2Pw/0yQ== Date: Wed, 23 Mar 2022 09:54:58 +0800 From: Gao Xiang To: Dmitry Vyukov Cc: Dongliang Mu , Muchun Song , syzbot , Andrew Morton , Chao Yu , linux-erofs@lists.ozlabs.org, LKML , Stephen Rothwell , syzkaller-bugs Subject: Re: [syzbot] WARNING: kobject bug in erofs_unregister_sysfs Message-ID: Mail-Followup-To: Dmitry Vyukov , Dongliang Mu , Muchun Song , syzbot , Andrew Morton , Chao Yu , linux-erofs@lists.ozlabs.org, LKML , Stephen Rothwell , syzkaller-bugs References: <000000000000dda2f905da80c934@google.com> <00000000000009cf1e05da85bb31@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 21, 2022 at 07:55:29AM +0100, Dmitry Vyukov wrote: > On Sun, 20 Mar 2022 at 05:19, Dongliang Mu wrote: > > > > On Sat, Mar 19, 2022 at 10:21 AM Muchun Song wrote: > > > > > > On Sat, Mar 19, 2022 at 6:33 AM syzbot > > > wrote: > > > > > > > > syzbot has bisected this issue to: > > > > > > > > commit 2768c206f2c3e95c0e5cf2e7f846103fda7cd429 > > > > Author: Muchun Song > > > > Date: Thu Mar 3 01:15:36 2022 +0000 > > > > > > > > mm: list_lru: allocate list_lru_one only when needed > > > > > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1495694d700000 > > > > start commit: 91265a6da44d Add linux-next specific files for 20220303 > > > > git tree: linux-next > > > > final oops: https://syzkaller.appspot.com/x/report.txt?x=1695694d700000 > > > > console output: https://syzkaller.appspot.com/x/log.txt?x=1295694d700000 > > > > kernel config: https://syzkaller.appspot.com/x/.config?x=617f79440a35673a > > > > dashboard link: https://syzkaller.appspot.com/bug?extid=f05ba4652c0471416eaf > > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137f17d9700000 > > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=114ebabd700000 > > > > > > > > Reported-by: syzbot+f05ba4652c0471416eaf@syzkaller.appspotmail.com > > > > Fixes: 2768c206f2c3 ("mm: list_lru: allocate list_lru_one only when needed") > > > > > > Does this patch [1] fix the issue? If yes, I am confused why the Fixes tag > > > should be the commit 2768c206f2c3? What am I missing here? > > > > Sometimes syzkaller bisection may make mistakes. Please ignore it. > > > > > > > > [1] https://lore.kernel.org/r/20220315132814.12332-1-dzm91@hust.edu.cn > > > > Let's tell syzbot so that it reports new bugs in future: > > #syz fix: fs: erofs: add sanity check for kobject in erofs_unregister_sysfs Thanks! The fix has been landed upstream now. Thanks, Gao Xiang