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 46294C433EF for ; Sat, 18 Sep 2021 01:57:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24773604E9 for ; Sat, 18 Sep 2021 01:57:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238731AbhIRB62 (ORCPT ); Fri, 17 Sep 2021 21:58:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233022AbhIRB60 (ORCPT ); Fri, 17 Sep 2021 21:58:26 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA182C061574; Fri, 17 Sep 2021 18:57:03 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id r2so11287687pgl.10; Fri, 17 Sep 2021 18:57:03 -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=DLTPW/hfQBEBoxi8tw2Sw1p9mg4aUgf8URr4JiL3FCk=; b=Eymdlr9G0tSoHCXjKX4Nxga3jl3j7W27x1JiBCsAZkviBzZZhOQkLrElNdaKtSO2tK QOUh3q4L8o/2jSU8HjoNVPSSMU/87cvWUGNwdeYVYVkXFx+lgLEdUHYpBgR1USgt5Nru 3NZTVENNMwx1FnYoFWAMTD45rtNZcENcdatQjdZeqiscYM49rA+rofP41PZayz3R4RUf gn8/Yts2MC8ek9tiUAmw5kXTN1qhIpyMPaS09eb+eOyX3PgdV69L5BxxEzHHs7p92lLn DRSXrB91q9Sn3Oxt5VowniUPCC/hN1rOhbNAj5lBbXynQxDyeiPBDx6bsPb2AJa5ksep DbeQ== 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=DLTPW/hfQBEBoxi8tw2Sw1p9mg4aUgf8URr4JiL3FCk=; b=JN45bbOMErIBy5ZM/snEhBklLOHEmdoEskt1a3UvqLqbiqofnXrnW+NFrfFLlLFwA9 MdtD62HYJ/v/S2D6BcXqGPVor92dXFj88I8S/buqkvCEcFn6DAkfW6dd7v1Uz23D4UDt /mrVH80Ywdz7bHp4Srfb39MXr649QwDW3vD8Qeww0c4RFFkOJcdhakmXt4kULCJCOE06 5srLDQ8eM0z8I+eI46/x2T/99/enwJW9XGs3wbIquydMlv/xzXq2bjBGbFrWJnOjZVZk Cmfug2sx4+BpnPEQ4ZFaexwwG6jOruWAB3CPl2Fi6VsJX/7ZW7O5GnUxb/A3yZLWtjIz 7sEg== X-Gm-Message-State: AOAM533EkORUOI7BvuJ3KUF+baUwjeDvz2yli0gO51ipVHVE4DyZ8x0M l/ZPHbc0/CeNiKK1KbhnEUzbFe1ygJJ3nTswGQ== X-Google-Smtp-Source: ABdhPJyKZhG5q9XAq1VBNVECcq2ZYnbwAIQtVeJY8Yg36bqqS6wuC1AN1QkkOctwsHvtQ8bwPcBSDXyNNXpQV9xc7oY= X-Received: by 2002:a65:6389:: with SMTP id h9mr12469451pgv.83.1631930223073; Fri, 17 Sep 2021 18:57:03 -0700 (PDT) MIME-Version: 1.0 References: <20210913135459.GA120302@rowland.harvard.edu> In-Reply-To: <20210913135459.GA120302@rowland.harvard.edu> From: Hao Sun Date: Sat, 18 Sep 2021 09:56:52 +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-usb@vger.kernel.org Hi Alan, Alan Stern =E4=BA=8E2021=E5=B9=B49=E6=9C=8813= =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 tri= ggered. > > > > HEAD commit: ac08b1c68d1b Merge tag 'pci-v5.15-changes' > > git tree: upstream > > console output: > > https://drive.google.com/file/d/1ZeDIMe-DoY3fB32j2p5ifgpq-Lc5N74I/view?= usp=3Dsharing > > kernel config: https://drive.google.com/file/d/1qrJUXD8ZIeAkg-xojzDpp04= v9MtQ8RR6/view?usp=3Dsharing > > Syzlang reproducer: > > https://drive.google.com/file/d/1tZe8VmXfxoPqlNpzpGOd-e5WCSWgbkxB/view?= usp=3Dsharing > > Similar report: > > https://groups.google.com/g/syzkaller-bugs/c/zX55CUzjBOY/m/uf91r0XqAgAJ > > > > Sorry, I don't have a C reproducer for this crash but have a Syzlang > > 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_syzkalle= r_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. Regards Hao