netdev - Re: use-after-free in usbnet

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Message-Id: <201203221008.46882.oneukum@suse.de>
Date:	Thu, 22 Mar 2012 10:08:46 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	Ming Lei <tom.leiming@...il.com>
Cc:	Alan Stern <stern@...land.harvard.edu>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org,
	Fedora Kernel Team <kernel-team@...oraproject.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: use-after-free in usbnet

Am Mittwoch, 21. März 2012, 17:22:59 schrieb Ming Lei:

> -
> +               usb_get_urb(urb);
>                 spin_unlock_irqrestore(&q->lock, flags);
>                 // during some PM-driven resume scenarios,
>                 // these (async) unlinks complete immediately
> @@ -597,6 +597,7 @@ static int unlink_urbs (struct usbnet *dev, struct
> sk_buff_head *q)
>                         netdev_dbg(dev->net, "unlink urb err, %d\n", retval);
>                 else
>                         count++;
> +               usb_put_urb(urb);


Hi,

this looks good, but could you add a comment explaining the reason for
taking a reference?

	Regards
		Oliver
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