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From: Alan Stern <stern@rowland.harvard.edu>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: syzbot <syzbot+7fa38a608b1075dfd634@syzkaller.appspotmail.com>,
	LKML <linux-kernel@vger.kernel.org>,
	USB list <linux-usb@vger.kernel.org>, <mans@mansr.com>,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: Re: general protection fault in usb_set_interface
Date: Mon, 16 Dec 2019 10:05:11 -0500 (EST)
Message-ID: <Pine.LNX.4.44L0.1912161002080.1406-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <CAAeHK+yz3dtfx0Jfd4sbOcN8tSxp8+qAvW609sP_yJC5q6vq8A@mail.gmail.com>

On Mon, 16 Dec 2019, Andrey Konovalov wrote:

> On Fri, Dec 13, 2019 at 8:51 PM Alan Stern <stern@rowland.harvard.edu> wrote:
> >
> > On Fri, 13 Dec 2019, Andrey Konovalov wrote:
> >
> > > > > Let's retry here:
> > > >
> > > > > #syz test: https://github.com/google/kasan.git f0df5c1b
> > > >
> > > > This bug is already marked as fixed. No point in testing.
> > > >
> > >
> > > Hm, that explains some of the weirdness. It doesn't explain though
> > > neither why the patch was actually tested when Alan requested it nor
> > > why syzbot sent no reply.
> >
> > In the meantime, is there any way to get syzbot to test the new patch
> > with the old reproducer?  Perhaps tell it to re-open this bug?
> 
> No, we can only test this manually now. I can run the reproducer for
> you. Should I revert the fix for this bug and then apply your patch?
> What's the expected result?

Please simply run the patch as it is, with no other changes.  The 
expected result is a use-after-free Read in usbvision_v4l2_open, just 
as with c7b0ec009a216143df30.

Alan Stern


  reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-13 12:15 Andrey Konovalov
2019-12-13 12:16 ` syzbot
2019-12-13 12:19   ` Andrey Konovalov
2019-12-13 19:51     ` Alan Stern
2019-12-16 14:59       ` Andrey Konovalov
2019-12-16 15:05         ` Alan Stern [this message]
2019-12-16 15:24           ` Andrey Konovalov
2019-12-17 13:17           ` Dmitry Vyukov
  -- strict thread matches above, loose matches on Subject: below --
2019-09-16 13:29 syzbot
2019-09-16 20:51 ` Alan Stern
2019-09-16 21:03   ` syzbot
2019-09-17 15:16     ` Alan Stern
2019-09-17 15:28       ` syzbot
2019-09-17 15:53         ` Alan Stern
2019-09-17 16:06           ` syzbot
2019-09-17 17:36             ` Alan Stern
2019-09-17 18:08               ` Alan Stern
2019-09-17 18:15                 ` syzbot
2019-09-17 18:31                   ` Alan Stern
2019-09-17 18:43                     ` syzbot
2019-09-18 18:57                       ` Alan Stern
2019-09-19 15:19                         ` Andrey Konovalov

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