linux-kernel - Re: [syzbot] INFO: task hung in sisusb

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Message-ID: <CACT4Y+ZQOrbeT5_Z+DnUskQkX94ztc+bQ0O=SYa1LgV0mswBAg@mail.gmail.com>
Date:   Wed, 27 Oct 2021 08:27:21 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Oliver Neukum <oneukum@...e.com>
Cc:     syzbot <syzbot+fd9d03311cdce9a9ec36@...kaller.appspotmail.com>,
        andreyknvl@...gle.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, thomas@...ischhofer.net
Subject: Re: [syzbot] INFO: task hung in sisusb_open

On Mon, 25 Oct 2021 at 16:40, 'Oliver Neukum' via syzkaller-bugs
<syzkaller-bugs@...glegroups.com> wrote:
>
>
> On 22.10.21 17:10, syzbot wrote:
> > syzbot has found a reproducer for the following issue on:
> >
> > HEAD commit:    2f111a6fd5b5 Merge tag 'ceph-for-5.15-rc7' of git://github..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=15a3aaf0b00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=61f4d9af07d3bbdf
> > dashboard link: https://syzkaller.appspot.com/bug?extid=fd9d03311cdce9a9ec36
> > compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13d4e9fcb00000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1444ada4b00000
>
> Hi,
>
> do I understand the reproducer correctly in that it just creates a
> device and then
> does nothing?

Hi Oliver,

Yes, it looks like it connects some device and executes some handshake
sequence and then does nothing beyond that.