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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 D00D6C5DF61 for ; Thu, 7 Nov 2019 13:43:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A6F9F218AE for ; Thu, 7 Nov 2019 13:43:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389459AbfKGNnD (ORCPT ); Thu, 7 Nov 2019 08:43:03 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:39400 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389073AbfKGNmI (ORCPT ); Thu, 7 Nov 2019 08:42:08 -0500 Received: by mail-il1-f197.google.com with SMTP id o11so2662101ilc.6 for ; Thu, 07 Nov 2019 05:42:07 -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=Nw05O48tfZnOsvKSy1GxiAM521gtqxH1bmLh1PZrh9M=; b=Gd3Icrj/K83CN7C3UpkfBmOwPm/p9ojSODmSSpPvSv4fchh4SD9xBtIzE1dZcU/78u th/10N5rJx4KXS7XyRKhhfTgJRKgMpNcd+ME90P9JUKDlWfm5YVfto6zaU2EA9kh9hMY v3ckTGV5wdqM381snqoxUsyjfyh70oJJTb1I45gmxk7P8x4xNkDvG/6E75QgmVETeP0d 2hFdjd/8cc3e7nqLmByYWa1nso0d8lLwICgLt5b2CyIS8INyFNJB8RyIE2Qj7/ZOmCwD IOe2H5y8bU/dvBlKuOo+5AkxzKXUfwl2u2YKuj7vzkdAHhtZAqplQkzMWZ+mGtI/doUZ v5oA== X-Gm-Message-State: APjAAAVQkCnhOa+nPJYl7KGeoS+ypuPmVXsCKfhADMTFUftpWRYOOrIr XIadH1oMehPmdv8GGf7TUo2Xzn08PK5radNsSMUzrtfJiwuB X-Google-Smtp-Source: APXvYqyNENH6B9y0Wez5W5uFuh4AQx6Njq+f4QH6gQ9D1z+gBpWcYcVbu/AE80nseMiHpzphhK8i6DvSZXMZjz4S+ATHb/GjXcIG MIME-Version: 1.0 X-Received: by 2002:a5d:8450:: with SMTP id w16mr3313990ior.11.1573134127375; Thu, 07 Nov 2019 05:42:07 -0800 (PST) Date: Thu, 07 Nov 2019 05:42:07 -0800 In-Reply-To: <000000000000bfd4270578abe88b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d8b0630596c1d4a0@google.com> Subject: Re: possible deadlock in flush_workqueue (2) From: syzbot To: aarcange@redhat.com, adilger.kernel@dilger.ca, akpm@linux-foundation.org, aneesh.kumar@linux.vnet.ibm.com, dave@stgolabs.net, davem@davemloft.net, hughd@google.com, jiangshanlai@gmail.com, kirill.shutemov@linux.intel.com, kuznet@ms2.inr.ac.ru, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mhocko@kernel.org, mike.kravetz@oracle.com, n-horiguchi@ah.jp.nec.com, netdev@vger.kernel.org, prakash.sangappa@oracle.com, sbrivio@redhat.com, sd@queasysnail.net, syzkaller-bugs@googlegroups.com, tj@kernel.org, torvalds@linux-foundation.org, tytso@mit.edu, viro@zeniv.linux.org.uk, yoshfuji@linux-ipv6.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org syzbot suspects this bug was fixed by commit: commit e7c58097793ef15d58fadf190ee58738fbf447cd Author: Mike Kravetz Date: Tue Jan 8 23:23:32 2019 +0000 hugetlbfs: revert "Use i_mmap_rwsem to fix page fault/truncate race" bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14ec0d2c600000 start commit: ca9eb48f Merge tag 'regulator-v5.0' of git://git.kernel.or.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=963b24abf3f7c2d8 dashboard link: https://syzkaller.appspot.com/bug?extid=a50c7541a4a55cd49b02 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12097f03400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b55ac5400000 If the result looks correct, please mark the bug fixed by replying with: #syz fix: hugetlbfs: revert "Use i_mmap_rwsem to fix page fault/truncate race" For information about bisection process see: https://goo.gl/tpsmEJ#bisection