linux-kernel - Re: general protection fault in open

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Message-ID: <Pine.LNX.4.44L0.1909241031550.6144-100000@netrider.rowland.org>
Date:   Tue, 24 Sep 2019 10:33:12 -0400 (EDT)
From:   Alan Stern <stern@...land.harvard.edu>
To:     Andrey Konovalov <andreyknvl@...gle.com>
cc:     syzbot <syzbot+dbd38fbb686a9681143a@...kaller.appspotmail.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: general protection fault in open_rio

On Tue, 24 Sep 2019, Andrey Konovalov wrote:

> On Tue, Sep 24, 2019 at 4:19 PM syzbot
> <syzbot+dbd38fbb686a9681143a@...kaller.appspotmail.com> wrote:
> >
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit:    d9e63adc usb-fuzzer: main usb gadget fuzzer driver
> > git tree:       https://github.com/google/kasan.git usb-fuzzer
> > console output: https://syzkaller.appspot.com/x/log.txt?x=1602b303600000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=f4fa60e981ee8e6a
> > dashboard link: https://syzkaller.appspot.com/bug?extid=dbd38fbb686a9681143a
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> >
> > Unfortunately, I don't have any reproducer for this crash yet.
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+dbd38fbb686a9681143a@...kaller.appspotmail.com

> Most probably the same bug:
> 
> https://syzkaller.appspot.com/bug?extid=745b0dff8028f9488eba
> 
> #syz dup: KASAN: invalid-free in disconnect_rio (2)

Even more to the point, a patch was recently posted to the mailing list 
to remove the rio500 driver entirely:

	https://marc.info/?l=linux-usb&m=156925553004947&w=2

Alan Stern