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 ACDF3C3F68F for ; Thu, 26 Dec 2019 22:06:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86C1320838 for ; Thu, 26 Dec 2019 22:06:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726976AbfLZWGC (ORCPT ); Thu, 26 Dec 2019 17:06:02 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:36090 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726105AbfLZWGC (ORCPT ); Thu, 26 Dec 2019 17:06:02 -0500 Received: by mail-io1-f72.google.com with SMTP id 144so17791032iou.3 for ; Thu, 26 Dec 2019 14:06:01 -0800 (PST) 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=gzUrg7S5MS19Le8XOVi5kKaSwBX6RM9XMQ6La+L8Ojw=; b=ZT8XTH7CTDP13w/xsrqfgOb0NfcfoY3G75qDZj8Bsp4BKDzsOInZDK/oF+pI4jZmOP V27B3svhpHh58bPigGlVKk/UPVQlGwA9jx4f1wlW0o695MqFeDUIGAcVYpswoPbzS2NI /dqYDMI73T7Gt7aQJ6GCsOB4TYHP/br7aDEzTxrq97oZByyyELIV0XEa1crr4HvPEdFd xmn6osNuZsQwyeUbJiUPMjmFrjYYfnAMlC94TV89UnT8oP4iaBcILu8+GP1sNfHkm/wi PdrVSAdvaw5L7kvIrgQmJDvHzkGARk4oblqOB2GwkuW3LZ0BwNc9qsTz6JoDbRn82oR0 5BZw== X-Gm-Message-State: APjAAAUfIlqi8Qs/8H5r3Nqjg1mzzQ3BAB599QbSY3fy38W1JRpH9B3R l0ThpEu9yH7BZZAZtsZO9/XE7UqU9vX0m23KLpZLmmKHarZG X-Google-Smtp-Source: APXvYqyMZv3kpon40+DQrGh+yfCnK8mSm9toK+x/iErfeVKIKwnfL/LxGdCfc0MoETQHENDEpuke1u/6VGg2emJes+rvcYK8a8Om MIME-Version: 1.0 X-Received: by 2002:a5d:964e:: with SMTP id d14mr31633862ios.193.1577397961566; Thu, 26 Dec 2019 14:06:01 -0800 (PST) Date: Thu, 26 Dec 2019 14:06:01 -0800 In-Reply-To: <000000000000016d8b059aa2030e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002b326d059aa295e9@google.com> Subject: Re: INFO: task hung in sync_inodes_sb (3) From: syzbot To: akpm@linux-foundation.org, axboe@kernel.dk, dave@stgolabs.net, hch@lst.de, hughd@google.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, ming.lei@redhat.com, osandov@fb.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this bug to: commit 6dc4f100c175dd0511ae8674786e7c9006cdfbfa Author: Ming Lei Date: Fri Feb 15 11:13:19 2019 +0000 block: allow bio_for_each_segment_all() to iterate over multi-page bvec bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1674423ee00000 start commit: 46cf053e Linux 5.5-rc3 git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=1574423ee00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1174423ee00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35 dashboard link: https://syzkaller.appspot.com/bug?extid=2b9e54155c8c25d8d165 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152bdc56e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=159c489ee00000 Reported-by: syzbot+2b9e54155c8c25d8d165@syzkaller.appspotmail.com Fixes: 6dc4f100c175 ("block: allow bio_for_each_segment_all() to iterate over multi-page bvec") For information about bisection process see: https://goo.gl/tpsmEJ#bisection