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Date:   Wed, 18 Sep 2019 14:57:24 -0400 (EDT)
From:   Alan Stern <stern@rowland.harvard.edu>
To:     syzbot <syzbot+7fa38a608b1075dfd634@syzkaller.appspotmail.com>
cc:     andreyknvl@google.com, <gregkh@linuxfoundation.org>,
        <kai.heng.feng@canonical.com>, <linux-kernel@vger.kernel.org>,
        <linux-usb@vger.kernel.org>, <mans@mansr.com>, <oneukum@suse.com>,
        <syzkaller-bugs@googlegroups.com>
Subject: Re: general protection fault in usb_set_interface
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Message-ID: <Pine.LNX.4.44L0.1909181454300.1507-100000@iolanthe.rowland.org>
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On Tue, 17 Sep 2019, syzbot wrote:

> Hello,
> 
> syzbot has tested the proposed patch but the reproducer still triggered  
> crash:
> WARNING in sysfs_remove_group
> 
> ------------[ cut here ]------------
> sysfs group 'power' not found for kobject 'radio0'

Andrey:

Is there any way to tell syzbot to run the reproducer but with only one 
device instance (that is, only one dummy-hcd bus)?

Or can you a new, modified reproducer that will do this?

Alan Stern