linux-kernel - Re: [linux-usb-devel] 2.6.20-rc4: null pointer deref in khubd

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Message-ID: <20070110225629.GK3700@elf.ucw.cz>
Date:	Wed, 10 Jan 2007 23:56:29 +0100
From:	Pavel Machek <pavel@....cz>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Oliver Neukum <oliver@...kum.org>,
	linux-usb-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...l.org>, Greg KH <greg@...ah.com>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [linux-usb-devel] 2.6.20-rc4: null pointer deref in khubd

Hi!

> > The obvious change with this device is that usb_set_configuration() is never
> > called, but that should not matter.
> 
> No, I think you're barking up the wrong tree.
> 
> Pavel, did you have CONFIG_USB_MULTITHREAD_PROBE turned on?  I bet you did 
> -- there's no other way to generate the messages in your syslog.

Yep, you are right.

> Don't use that kconfig option.  It's broken (as you saw) and needs to be
> either removed or replaced.

Perhaps it should be disabled before 2.6.20? This is actually
regression...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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