netdev - Re: [PATCH] net: usb: asix: fill null-ptr-deref in asix

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Message-ID: <1509981658.2024.37.camel@suse.com>
Date:   Mon, 06 Nov 2017 16:20:58 +0100
From:   Oliver Neukum <oneukum@...e.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     allan <allan@...x.com.tw>,
        Colin Ian King <colin.king@...onical.com>,
        "David S . Miller" <davem@...emloft.net>,
        Philippe Reynes <tremyfr@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Dean Jenkins <Dean_Jenkins@...tor.com>,
        Peter Chen <peter.chen@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: usb: asix: fill null-ptr-deref in asix_suspend

Am Montag, den 06.11.2017, 13:30 +0100 schrieb Andrey Konovalov:
> On Mon, Nov 6, 2017 at 10:49 AM, Oliver Neukum <oneukum@...e.com> wrote:
> > 
> > 
> > 2. Will a device work after that? The appropriate fix may be to wait
> > until the device is properly initialized.
> 
> This shouldn't affect real devices as far as I understand. The crash
> can be caused by a crafted malicious device.

Hi!

Hm. That seems strange as driver_priv is kmalloced. Do you
still have a descriptor that causes this?
Shouldn't we rather reject such a broken device?

	Regards
		Oliver