linux-kernel - Re: [PATCH] firmware loader: fix use-after-free by double abort

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Date:	Mon, 17 Jun 2013 21:05:47 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	nirinA raseliarison <nirina.raseliarison@...il.com>,
	linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
	stable <stable@...r.kernel.org>
Subject: Re: [PATCH] firmware loader: fix use-after-free by double abort

On Tue, Jun 18, 2013 at 08:33:55AM +0800, Ming Lei wrote:
> On Tue, Jun 18, 2013 at 7:59 AM, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> > On Sat, Jun 15, 2013 at 04:36:38PM +0800, Ming Lei wrote:
> >> fw_priv->buf is accessed in both request_firmware_load() and
> >> writing to sysfs file of 'loading' context, but not protected
> >> by 'fw_lock' entirely. The patch makes sure that access on
> >> 'fw_priv->buf' is protected by the lock.
> >>
> >> So fixes the double abort problem reported by nirinA raseliarison:
> >>
> >>       http://lkml.org/lkml/2013/6/14/188
> >>
> >> Reported-and-tested-by: nirinA raseliarison <nirina.raseliarison@...il.com>
> >> Cc: Guenter Roeck <linux@...ck-us.net>
> >> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> >> Cc: stable <stable@...r.kernel.org>
> >> Signed-off-by: Ming Lei <ming.lei@...onical.com>
> >
> > So this is a 3.9-stable thing?  Anything newer than that?
> 
> Yes, only 3.9-stable need this.
> 
I may be missing something, but why would mainline not need it ?
Or do you mean "mainline plus 3.9" ?

Thanks,
Guenter
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