linux-kernel - Re: [PATCH] [usb-serial] fix Ooops on uplug

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Message-ID: <Pine.LNX.4.44L0.0907211205420.2724-100000@iolanthe.rowland.org>
Date:	Tue, 21 Jul 2009 12:11:39 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Daniel Mack <daniel@...aq.de>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] [usb-serial] fix Ooops on uplug

On Tue, 21 Jul 2009, Alan Cox wrote:

> > The problem is that freed resources are accessed, and that can lead to
> > any kind of strange kernel faults from crashing to other subsequent
> > errors.
> > 
> > Did you try my patch?

No.

> We've already established your patch is wrong. So trying it isn't at all
> helpful.

I'll take your word for it.  It will take some time to figure out 
exactly which buffers are getting used after they are freed, although 
the most likely is the usb_serial_port structure itself.

Let you know what I find...

Alan Stern


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