linux-kernel - Re: [Regression, 2.6.33-rc1->current git] NULL pointer in usb_serial_probe() introduced by the recent kfifo changes

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Message-ID: <20091223053734.GC22808@kroah.com>
Date:	Tue, 22 Dec 2009 21:37:34 -0800
From:	Greg KH <greg@...ah.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>, linux-usb@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Stefani Seibold <stefani@...bold.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Regression, 2.6.33-rc1->current git] NULL pointer in
	usb_serial_probe() introduced by the recent kfifo changes

On Wed, Dec 23, 2009 at 02:51:31AM +0100, Rafael J. Wysocki wrote:
> Hi,
> 
> Something like the patch below is necessary to fix a new NULL pointer deref
> in usb_serial_probe() that appeared after the recent kfifo changes (in short,
> the kfifo changes modified the semantics of kfifo_alloc() that
> usb_serial_probe() reiled on).

What semantic changed?  I thought that the kfifo patches came with
patches that also fixed up any changed that were needed.  What went
wrong here?

Does your patch solve the oops?

thanks,

greg k-h
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