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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 1465ECA9ED0 for ; Fri, 1 Nov 2019 01:02:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E6C38208E3 for ; Fri, 1 Nov 2019 01:02:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728074AbfKABCE (ORCPT ); Thu, 31 Oct 2019 21:02:04 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:47290 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727455AbfKABCE (ORCPT ); Thu, 31 Oct 2019 21:02:04 -0400 Received: by mail-io1-f72.google.com with SMTP id r84so6113457ior.14 for ; Thu, 31 Oct 2019 18:02:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=g5b/uq1jPzIHWKTG4KkvcGY51W0aJ/wSvlfQDeK7EKs=; b=fTcUK6MFKyuCoklD/byVjoBpEMTz2OJhBVo/+5F/dgak1E242rNxiwjf+yNyh98mrW SttrRsTG5yJWcj3YZy8ytdBHZ6Cj9TXYOaS7OqTL/dSMzRjTdTcgiAqPSC8Qs43aKQLZ giJLgsTT1v4xFLCKmrt4JDvxai7yla2c/8xTsTEMrROexHgvU5oNIlC+35rc9KPqDWjV giHmdekYiLSwOC/XQmwnr7X9Pyc4lwN0D9hIaLH5RhgUEFBdr5mNasqfPcWYVhvu5F70 39DeMDyz1FT1IQzuRuLLg+H6j9viFAkfnHloeixJwids5XfbvZDeeQxTxDc0gCip+BZl iJ9g== X-Gm-Message-State: APjAAAXkGbv28k53D8TaDr23fixJvB0rS71tPIYJA/FPV0cjm5TE/Tfm rYStlnCsRMQMoktTYNQ64CB9gFKedTDEW/bpuEaGesTkClZg X-Google-Smtp-Source: APXvYqxZsTelPOF42qriET4H2YWOnXA8pSOyk4C53x/sSGq8f4RGlUtiE6R/yVt6douHfDWehA+zCy3otomUVEeICPtM27LaOmVm MIME-Version: 1.0 X-Received: by 2002:a5e:c302:: with SMTP id a2mr7896816iok.295.1572570121338; Thu, 31 Oct 2019 18:02:01 -0700 (PDT) Date: Thu, 31 Oct 2019 18:02:01 -0700 In-Reply-To: <000000000000d73b12059608812b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000077853c05963e8313@google.com> Subject: Re: WARNING in print_bfs_bug From: syzbot To: akpm@linux-foundation.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, f.fainelli@gmail.com, hannes@cmpxchg.org, hawk@kernel.org, hughd@google.com, idosch@mellanox.com, jakub.kicinski@netronome.com, jglisse@redhat.com, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, kirill.shutemov@linux.intel.com, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mkubecek@suse.cz, netdev@vger.kernel.org, petrm@mellanox.com, roopa@cumulusnetworks.com, sfr@canb.auug.org.au, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, william.kucharski@oracle.com, willy@infradead.org, yhs@fb.com, yoshfuji@linux-ipv6.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org syzbot has bisected this bug to: commit 9c61acffe2b8833152041f7b6a02d1d0a17fd378 Author: Song Liu Date: Wed Oct 23 00:24:28 2019 +0000 mm,thp: recheck each page before collapsing file THP bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15be4e14e00000 start commit: 49afce6d Add linux-next specific files for 20191031 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=17be4e14e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13be4e14e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c5f119b33031056 dashboard link: https://syzkaller.appspot.com/bug?extid=62ebe501c1ce9a91f68c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c162f4e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=131b5eb8e00000 Reported-by: syzbot+62ebe501c1ce9a91f68c@syzkaller.appspotmail.com Fixes: 9c61acffe2b8 ("mm,thp: recheck each page before collapsing file THP") For information about bisection process see: https://goo.gl/tpsmEJ#bisection