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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 96AA7C43381 for ; Mon, 25 Mar 2019 14:02:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 673032085A for ; Mon, 25 Mar 2019 14:02:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728072AbfCYOC5 (ORCPT ); Mon, 25 Mar 2019 10:02:57 -0400 Received: from mail-qt1-f194.google.com ([209.85.160.194]:39135 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726136AbfCYOCw (ORCPT ); Mon, 25 Mar 2019 10:02:52 -0400 Received: by mail-qt1-f194.google.com with SMTP id t28so10353878qte.6 for ; Mon, 25 Mar 2019 07:02:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=QO9hCHcYPIvg66x+248nyFXgmiRj/VUkTksDhxQ54hI=; b=rn+qLyh/0odjKlT9fTH/K8Z4s+Sx/jAjRNOSlEfBgCisE/tcrZZ2fa7NFzRdi6GQAp 9HYn438i+HdkNGNWl8TuT/khxskBxnoTy5ywjEiCImFVi/G+GaTYuKdu1PCcfohAX9rq o2ve3ypKF3HCfRFSaIHxyj+afuHM1lQNgwHQSZVyHsHRVVVfGZO6AaQDAhTH1bvEzV6P HSjlyRyt3cXbKZOsWSeh8gCn8U3t++OZJfniSpfhQSL2XDiiGsOJ9rCGtHEW56HMM6BF YWIaMUn93JGTNeaJpgV6UwKXicl/3VDYr7iKtS59m9gDEoFGxAaLDcI1uxIafhXCuuyM IXfg== X-Gm-Message-State: APjAAAVcQEYKvOKDYrbXswHhBCxlb6CpqbpQpZcNFYfnawY6jUdXKB9J i1jZs9dOfUvwOnq3NdrWHSNXxQ== X-Google-Smtp-Source: APXvYqznCr5gfnJVEKTi8gX+vCcnf+yvDkiZ+WWZCj/Fs5neRxLZbwPSn7OEwZNdQclvYWgzliandg== X-Received: by 2002:ac8:2eb8:: with SMTP id h53mr19923098qta.188.1553522571537; Mon, 25 Mar 2019 07:02:51 -0700 (PDT) Received: from redhat.com (pool-173-76-246-42.bstnma.fios.verizon.net. [173.76.246.42]) by smtp.gmail.com with ESMTPSA id 204sm5268191qki.58.2019.03.25.07.02.49 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 25 Mar 2019 07:02:50 -0700 (PDT) Date: Mon, 25 Mar 2019 10:02:43 -0400 From: "Michael S. Tsirkin" To: syzbot Cc: jasowang@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, virtualization@lists.linux-foundation.org, weiyj.lk@gmail.com Subject: Re: INFO: task hung in vhost_net_stop_vq Message-ID: <20190325100223-mutt-send-email-mst@kernel.org> References: <0000000000004f8499057be95e1d@google.com> <0000000000008ee87005847fc985@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000008ee87005847fc985@google.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Looks like more iotlb locking mess? On Tue, Mar 19, 2019 at 10:21:00PM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 6b1e6cc7855b09a0a9bfa1d9f30172ba366f161c > Author: Jason Wang > Date: Thu Jun 23 06:04:32 2016 +0000 > > vhost: new device IOTLB API > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1486ad27200000 > start commit: 6b1e6cc7 vhost: new device IOTLB API > git tree: upstream > final crash: https://syzkaller.appspot.com/x/report.txt?x=1686ad27200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=1286ad27200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c94f9f0c0363db4b > dashboard link: https://syzkaller.appspot.com/bug?extid=d21e6e297322a900c128 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=141db34d400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=108ef293400000 > > Reported-by: syzbot+d21e6e297322a900c128@syzkaller.appspotmail.com > Fixes: 6b1e6cc7 ("vhost: new device IOTLB API")