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

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Date:   Mon, 06 Nov 2017 17:32:57 +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, 17:05 +0100 schrieb Andrey Konovalov:
> On Mon, Nov 6, 2017 at 4:20 PM, Oliver Neukum <oneukum@...e.com> wrote:
> > 

> I do have a way to reproduce this.
> 
> As far as I understand, for this particular device ax88172_bind() is
> called, which doesn't assign anything to dev->driver_priv, so that's
> why it is NULL in suspend() and resume().

Thanks and ouch. That means it never worked for those devices.
That makes this a rather serious bug and your fix is right.

	Regards
		Oliver