linux-kernel - Re: general protection fault in usb_set

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Message-ID: <Pine.LNX.4.44L0.1909181454300.1507-100000@iolanthe.rowland.org>
Date:   Wed, 18 Sep 2019 14:57:24 -0400 (EDT)
From:   Alan Stern <stern@...land.harvard.edu>
To:     syzbot <syzbot+7fa38a608b1075dfd634@...kaller.appspotmail.com>
cc:     andreyknvl@...gle.com, <gregkh@...uxfoundation.org>,
        <kai.heng.feng@...onical.com>, <linux-kernel@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, <mans@...sr.com>, <oneukum@...e.com>,
        <syzkaller-bugs@...glegroups.com>
Subject: Re: general protection fault in usb_set_interface

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