linux-kernel - Re: INFO: task hung in hub_port

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 18 Sep 2021 09:56:52 +0800
From:   Hao Sun <sunhao.th@...il.com>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     Greg KH <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org,
        a.darwish@...utronix.de, johan@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        oneukum@...e.com
Subject: Re: INFO: task hung in hub_port_init

Hi Alan,

Alan Stern <stern@...land.harvard.edu> 于2021年9月13日周一 下午9:55写道：
>
> 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/view?usp=sharing
> > kernel config: https://drive.google.com/file/d/1qrJUXD8ZIeAkg-xojzDpp04v9MtQ8RR6/view?usp=sharing
> > Syzlang reproducer:
> > https://drive.google.com/file/d/1tZe8VmXfxoPqlNpzpGOd-e5WCSWgbkxB/view?usp=sharing
> > 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_syzkaller_programs.md
> >
> > If you fix this issue, please add the following tag to the commit:
> > Reported-by: Hao Sun <sunhao.th@...il.com>
>
> 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