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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_IN_DEF_DKIM_WL 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 01AA9C4742C for ; Fri, 13 Nov 2020 12:10:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B422322240 for ; Fri, 13 Nov 2020 12:10:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="B07q5E3c" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726491AbgKMMKV (ORCPT ); Fri, 13 Nov 2020 07:10:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726449AbgKMMKU (ORCPT ); Fri, 13 Nov 2020 07:10:20 -0500 Received: from mail-qv1-xf41.google.com (mail-qv1-xf41.google.com [IPv6:2607:f8b0:4864:20::f41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 707B1C0613D1 for ; Fri, 13 Nov 2020 04:10:19 -0800 (PST) Received: by mail-qv1-xf41.google.com with SMTP id 63so4443661qva.7 for ; Fri, 13 Nov 2020 04:10:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=iiehXoilaLcjVL9BlBQaNhTaAJDG9nqqIO0TWMbl7mA=; b=B07q5E3cb5/mB7Ld7CNt3Vbvde8zMncRaosaJDlZv6Vt864LjakgIYDon/9ubBonvg MO3dfCIP5RFXoUEuTnK7p8eV0NxSxk1WH1Oa0YEVRaifFQE/SkBLrhNubfN70NR24tVd D9m5jD86WUrSyzE6XiabBxQIrGVN34QmK0s6i0KeMXu+JwDjPh2iF2jRylV3bjBlmq17 jge0XZ+wdtj6d0xSME6wxs+eY8E6end4ZX1KPOZSaD6XPoYcKtRYRbKQwwDNnOsKS4p4 sGxcLt+g5Kc2UZNxyhcQYCU5nnMlVoyrUE4ilHTXS9cc+ImaVSEHK0wNnztoDxy4E/7H ihnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=iiehXoilaLcjVL9BlBQaNhTaAJDG9nqqIO0TWMbl7mA=; b=skRsU5hxK2P1ieo71tXm6AVBssUDJ5zOUjwy8Dgbun//Rn0hR/FHB60ovIluEqQskA 9fEpU2NMiMQlBJKCMmK/CgVtPCAg/8vYppZ42AiHFYXtDWqY0C6CbpD48MXBLVNWg62q abcqOdTv/sHUcd9eCF36JmVrcPooLgxOMCP0Kt204lbrO4Yism0jr76T2pSuqdGgqLdu eNmUvywRGtzmVsH4aUSHHGUoYcruFmH7tx6pP9bdH0mcpsYpeSiOHPa89gPE6okumlpM Nk6L/c7QCLVDI+9glTvOG6ulsWJUP/R6cBKCk7LKIKMcIZs8ahKpg/ODIYbpzwUhOB33 aPeg== X-Gm-Message-State: AOAM530xR0HTAXp8r/4wQM8/IAaFKuKdwzHSobQa+PSws13RakKtIJMH HsSXWmUh1vV5C5/6BmZYlGd6oRVFr/2ZOwiUbwGkGA== X-Google-Smtp-Source: ABdhPJz0bG9vUG7cborAESnk3G+Mfz2v/pDLuOMyNrvdaU6cKXA9OkAgDWAnWlxShWUS3ojvDZ7hgvRtw5w5WSbreCg= X-Received: by 2002:a0c:e911:: with SMTP id a17mr2006226qvo.18.1605269418352; Fri, 13 Nov 2020 04:10:18 -0800 (PST) MIME-Version: 1.0 References: <00000000000061316205b0e750fc@google.com> <0000000000004cb88b05b2e8d1b4@google.com> In-Reply-To: From: Dmitry Vyukov Date: Fri, 13 Nov 2020 13:10:06 +0100 Message-ID: Subject: Re: INFO: task can't die in nbd_ioctl To: Ming Lei Cc: syzbot , Jens Axboe , Josef Bacik , linux-block , Linux Kernel Mailing List , nbd@other.debian.org, syzkaller-bugs Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Nov 3, 2020 at 8:21 AM Ming Lei wrote: > > On Sat, Oct 31, 2020 at 4:01 AM syzbot > wrote: > > > > syzbot has found a reproducer for the following issue on: > > > > HEAD commit: 4e78c578 Add linux-next specific files for 20201030 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=158c1798500000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=83318758268dc331 > > dashboard link: https://syzkaller.appspot.com/bug?extid=69a90a5e8f6b59086b2a > > compiler: gcc (GCC) 10.1.0-syz 20200507 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e051a8500000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bf75b8500000 > > Not reproduce this issue by above C reproducer with the kernel config > in hours running > on linus tree. Let's see how reproducible this is by syzbot: #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next-history.git 4e78c578