linux-kernel - Re: [PATCH] usb: core: Null deref in kernel with USB webcams.

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Message-ID: <CAO5W59jZdDgSBE3Tr79u7TuCrdsirhisFxKH6aCH5oE4soOz1g@mail.gmail.com>
Date:   Thu, 12 Nov 2020 18:15:08 +0000
From:   John Boero <boeroboy@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Felipe Balbi <balbi@...nel.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: core: Null deref in kernel with USB webcams.

Then why does line 278 right below it check for NULL?

On Thu, Nov 12, 2020 at 5:56 PM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Thu, Nov 12, 2020 at 05:13:30PM +0000, John Boero wrote:
> > Yes the patch is backwards sorry.  Testing alt proposal from
> > stern@...land.harvard.edu.  It may be a buggy driver
> > but it would be nice if a buggy driver couldn't bring down
> > the entire usb core. lsusb hangs until reboot or reset of usb.
>
> buggy kernel drivers can do anything, including deleting the contents of
> your disk.  We don't protect the kernel from itself, sorry :)
>
> good luck!
>
> greg k-h