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 C0FA7ECAAA1 for ; Fri, 28 Oct 2022 03:34:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235948AbiJ1De2 (ORCPT ); Thu, 27 Oct 2022 23:34:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235712AbiJ1DeX (ORCPT ); Thu, 27 Oct 2022 23:34:23 -0400 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12559D039B for ; Thu, 27 Oct 2022 20:34:22 -0700 (PDT) Received: by mail-io1-f70.google.com with SMTP id j17-20020a5d93d1000000b006bcdc6b49cbso3237537ioo.22 for ; Thu, 27 Oct 2022 20:34:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=d9bEgoyCkEVc1rviJui83BJ63zZs6aH07Bg8EsC0G6Q=; b=tFwUcpw+yHxc4WsUgOGcJ3fRPPuySON8fVRa9QjDZsXxCHBlhFBlRKzbpJpJIJ6+ok rWzEAXYUGKxFmb4eC9S/vqnaza9ElmbHnwp0ZKKjnVHJiodfDPm3PdwmyJtsvsKeGjqn vulE5sjr4OAM5/L8/rdOAEUKY920kqbTPENmfoSAG7xSQKWmENdt4yBn3EbBCnDQWRCV 0I+DhPJssoGelUnoQJpsWpoSSuBB9sqMWLB4cvmUzwhrmqql82Fr0RpvCeGxbRXyaRA2 M5fT6EXrbgSKj23SbMK8kSXwPuPUTsxsmNE5T0r43KlCZPAbMWB/0AfCagV1RsUnt5N2 lmlQ== X-Gm-Message-State: ACrzQf0WHaKLg51yFWHoKbKwsxn2CVoEskog8PvLPrNzQydir9AbfyrI c3kAxg2YgD91ty30/BL7AJYnZyepJPobzQm0/lQxl8x6SwaR X-Google-Smtp-Source: AMsMyM5D1/vrXmJp1T7B1mMtXHgOipwY7DPBpP1Uj5RWHyfccshSXYdP3JkEur3gchsb3YuZ8eqSfmteGNHGkWetUR0eZ6NgKSgP MIME-Version: 1.0 X-Received: by 2002:a05:6638:d96:b0:363:9ed9:1112 with SMTP id l22-20020a0566380d9600b003639ed91112mr32264367jaj.171.1666928061421; Thu, 27 Oct 2022 20:34:21 -0700 (PDT) Date: Thu, 27 Oct 2022 20:34:21 -0700 In-Reply-To: <000000000000a7077705eae5f90c@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f79f5905ec0fee38@google.com> Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in f2fs_stop_discard_thread From: syzbot To: changfengnan@vivo.com, chao@kernel.org, frank.li@vivo.com, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, wuhoipok@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 4d67490498acb4ffcef5ba7bc44990d46e66a44c Author: Fengnan Chang Date: Thu Aug 19 08:02:37 2021 +0000 f2fs: Don't create discard thread when device doesn't support realtime discard bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17da7522880000 start commit: 247f34f7b803 Linux 6.1-rc2 git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=143a7522880000 console output: https://syzkaller.appspot.com/x/log.txt?x=103a7522880000 kernel config: https://syzkaller.appspot.com/x/.config?x=a66c6c673fb555e8 dashboard link: https://syzkaller.appspot.com/bug?extid=035a381ea1afb63f098d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d92d6a880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e5dbba880000 Reported-by: syzbot+035a381ea1afb63f098d@syzkaller.appspotmail.com Fixes: 4d67490498ac ("f2fs: Don't create discard thread when device doesn't support realtime discard") For information about bisection process see: https://goo.gl/tpsmEJ#bisection