linux-kernel - Re: WARNING in snd_usbmidi_submit_urb/usb_submit

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Date:   Wed, 3 Jun 2020 17:21:43 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     syzbot <syzbot+5f1d24c49c1d2c427497@...kaller.appspotmail.com>,
        Felipe Balbi <balbi@...nel.org>, ingrassia@...genesys.com,
        LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: WARNING in snd_usbmidi_submit_urb/usb_submit_urb

On Wed, Jun 3, 2020 at 8:12 AM Greg KH <gregkh@...uxfoundation.org> wrote:
>
> On Tue, Jun 02, 2020 at 10:41:16PM -0700, syzbot wrote:
> > syzbot has found a reproducer for the following crash on:
> >
> > HEAD commit:    1ee08de1 Merge tag 'for-5.8/io_uring-2020-06-01' of git://..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=15f9e516100000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=b46ebd806238a886
> > dashboard link: https://syzkaller.appspot.com/bug?extid=5f1d24c49c1d2c427497
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > userspace arch: i386
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1667dcca100000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13f9e516100000
> >
> > The bug was bisected to:
> >
> > commit f2c2e717642c66f7fe7e5dd69b2e8ff5849f4d10
> > Author: Andrey Konovalov <andreyknvl@...gle.com>
> > Date:   Mon Feb 24 16:13:03 2020 +0000
> >
> >     usb: gadget: add raw-gadget interface
>
> I thought this "bisect to the tool that finds bugs" issue was fixed :)

The change was merged after this message was sent, and it also takes
some time to be deployed.