linux-kernel - Re: KASAN: use-after-free Read in device_release_driver

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Date:   Thu, 8 Aug 2019 14:43:57 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        syzbot <syzbot+1b2449b7b5dc240d107a@...kaller.appspotmail.com>,
        LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        Oliver Neukum <oneukum@...e.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: KASAN: use-after-free Read in device_release_driver_internal

On Thu, Aug 8, 2019 at 2:28 PM Andrey Konovalov <andreyknvl@...gle.com> wrote:
>
> On Wed, Aug 7, 2019 at 8:31 PM Alan Stern <stern@...land.harvard.edu> wrote:
> >
> > On Wed, 7 Aug 2019, syzbot wrote:
> >
> > > Hello,
> > >
> > > syzbot has tested the proposed patch and the reproducer did not trigger
> > > crash:
> > >
> > > Reported-and-tested-by:
> > > syzbot+1b2449b7b5dc240d107a@...kaller.appspotmail.com
> > >
> > > Tested on:
> > >
> > > commit:         6a3599ce usb-fuzzer: main usb gadget fuzzer driver
> > > git tree:       https://github.com/google/kasan.git
> > > kernel config:  https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae
> > > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > > patch:          https://syzkaller.appspot.com/x/patch.diff?x=132eec8c600000
> > >
> > > Note: testing is done by a robot and is best-effort only.
> >
> > Andrey, is there any way to get the console output from this test?
>
> Dmitry, would it be possible to link console log for successful tests as well?

Yes. Start by filing a feature request at
https://github.com/google/syzkaller/issues