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=-7.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 CF0E1C433EF for ; Sat, 18 Sep 2021 02:17:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B3EF6104F for ; Sat, 18 Sep 2021 02:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239719AbhIRCTC (ORCPT ); Fri, 17 Sep 2021 22:19:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238942AbhIRCTA (ORCPT ); Fri, 17 Sep 2021 22:19:00 -0400 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D3685C061574; Fri, 17 Sep 2021 19:17:37 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id m26so10874172pff.3; Fri, 17 Sep 2021 19:17:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=+M5W20MLNCUU/ws1gQOcAKUs2D9KZt8ThmqSRDtUw6U=; b=FtC54o/WljSING2cVeiMmgKsv0YonzncFPZ7ipCuQS5d86mpa9e8rtwwBzOBebZ8Q2 xZulJnGc5OJtYm02iOp3FqDZj2HuvTNNBYHCVwKvIDEqrhfrhm8SLF7B6fh7p9b+YJzK n927jKV53f4SDlH21+Ru1OSlpZYtwrxImLof3NsujtGiWFKJbG/WOnB9Jneemp+kUHQz YNx/B3wdVkDgIgKWMfOiJ8j4Jrx6IqWmmSChFkTAhyuuo3mfoUaAaTJzqdfVO7lmADJ7 71EwXDBXqPj8lYqS7qtkB4vl88GMVVV/07DNtLvYYh+EsGTg2x28cCDMZgKxwU7IzoQB hSmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=+M5W20MLNCUU/ws1gQOcAKUs2D9KZt8ThmqSRDtUw6U=; b=n3EmH63RLMj0AcN+RrUeYehBG/EsqUvmzt3lhto2osMKOArtDkO4pcAVKo7Lbv/Hi8 uv5Y3ZPtTJ0kMQlZG9xBHPqWSo70/cPWhpGP1g8ZL5GbwwMSDnTyAoMzArUZYLs0fn1m 9Eu7MaI70Yl0H2Z0Kjy9bmTr3sO7Bao+5qqOtOdqjX+sByT3mJCT8Sfs0733Y+q6Eyfb noWX/Qj3kULWbL1RZDT7VlS5n/16erlzHy+EfFk0O7bmYhUQWhDUb/0jMQWLLmu0BbCE WcNd+qj38rhFJZfd9bhJlL/4bW+pA2HR+b8NnBle2H6USQwZBAvM2LhvvUKOF4OGjAGe x2EQ== X-Gm-Message-State: AOAM531wXd6Ec7KasGk1YZzpnVMny2ssLEq8DmDAdvznM1UJmt3OqhI9 EiEUyYsVKUChNZMObLFuaVyMsNrX3g4PYprqfA== X-Google-Smtp-Source: ABdhPJxXSAvSWlF/7f0OzTk5MFdx2gRguc9muiaQroXRWm43FnQ9eahu0KIxXtmP6zY5/MfJg+PH8BaH6rFlfKhZf0E= X-Received: by 2002:a63:36c4:: with SMTP id d187mr12566785pga.205.1631931457171; Fri, 17 Sep 2021 19:17:37 -0700 (PDT) MIME-Version: 1.0 References: <20210913135459.GA120302@rowland.harvard.edu> <20210918020245.GA69263@rowland.harvard.edu> In-Reply-To: <20210918020245.GA69263@rowland.harvard.edu> From: Hao Sun Date: Sat, 18 Sep 2021 10:17:26 +0800 Message-ID: Subject: Re: INFO: task hung in hub_port_init To: Alan Stern Cc: Greg KH , linux-usb@vger.kernel.org, a.darwish@linutronix.de, johan@kernel.org, Linux Kernel Mailing List , oneukum@suse.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Alan Stern =E4=BA=8E2021=E5=B9=B49=E6=9C=8818= =E6=97=A5=E5=91=A8=E5=85=AD =E4=B8=8A=E5=8D=8810:02=E5=86=99=E9=81=93=EF=BC= =9A > > On Sat, Sep 18, 2021 at 09:56:52AM +0800, Hao Sun wrote: > > Hi Alan, > > > > Alan Stern =E4=BA=8E2021=E5=B9=B49=E6=9C=88= 13=E6=97=A5=E5=91=A8=E4=B8=80 =E4=B8=8B=E5=8D=889:55=E5=86=99=E9=81=93=EF= =BC=9A > > > > > > On Mon, Sep 13, 2021 at 11:13:15AM +0800, Hao Sun wrote: > > > > Hello, > > > > > > > > When using Healer to fuzz the Linux kernel, the following crash was= triggered. > > > > > > > > HEAD commit: ac08b1c68d1b Merge tag 'pci-v5.15-changes' > > > > git tree: upstream > > > > console output: > > > > https://drive.google.com/file/d/1ZeDIMe-DoY3fB32j2p5ifgpq-Lc5N74I/v= iew?usp=3Dsharing > > > > kernel config: https://drive.google.com/file/d/1qrJUXD8ZIeAkg-xojzD= pp04v9MtQ8RR6/view?usp=3Dsharing > > > > Syzlang reproducer: > > > > https://drive.google.com/file/d/1tZe8VmXfxoPqlNpzpGOd-e5WCSWgbkxB/v= iew?usp=3Dsharing > > > > Similar report: > > > > https://groups.google.com/g/syzkaller-bugs/c/zX55CUzjBOY/m/uf91r0Xq= AgAJ > > > > > > > > Sorry, I don't have a C reproducer for this crash but have a Syzlan= g > > > > reproducer. Also, hope the symbolized report can help. > > > > Here are the instructions on how to execute Syzlang prog: > > > > https://github.com/google/syzkaller/blob/master/docs/executing_syzk= aller_programs.md > > > > > > > > If you fix this issue, please add the following tag to the commit: > > > > Reported-by: Hao Sun > > > > > > There's not much hope of finding the cause of a problem like this > > > without seeing the kernel log. > > > > > > > Healer found another Syzlang prog to reproduce this task hang: > > https://paste.ubuntu.com/p/HCNYbKJYtx/ > > > > Also here is a very simple script to execute the reproducer: > > https://paste.ubuntu.com/p/ZTGmvFSP6d/ > > > > The `syz-execprog` and `syz-executor` are needed, so please build > > Syzkaller first before running the script. > > Hope this can help to find the root cause of the problem. > > I don't have time to install and figure out how to use Healer and > Syzkaller. But if you run the reproducer and post the kernel log, > I'll take a look at it. > Just executed the reproducer, here is the full log: https://paste.ubuntu.com/p/x43SqQy8PX/ Hao