linux-kernel - Re: [stable] [BUG][PATCH] cpqphp: fix kernel NULL pointer dereference

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Message-ID: <20081023203732.GA17600@kroah.com>
Date:	Thu, 23 Oct 2008 13:37:32 -0700
From:	Greg KH <greg@...ah.com>
To:	Alex Chiang <achiang@...com>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Yinghai Lu <yinghai@...nel.org>, stable@...nel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [stable] [BUG][PATCH] cpqphp: fix kernel NULL pointer
	dereference

On Thu, Oct 16, 2008 at 06:33:34PM -0600, Alex Chiang wrote:
> * Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>:
> > 
> > The root cause of this problem seems that cpqphp driver calls
> > pci_hp_register() wrongly. In current implementation, cpqphp driver
> > passes 'ctrl->pci_dev->subordinate' as a second parameter for
> > pci_hp_register(). But because hotplug slots and it's hotplug
> > controller (exists as a pci funcion) are on the same bus, it should be
> > 'ctrl->pci_dev->bus' instead.
> > 
> > Cc: <stable@...nel.org>
> 
> Acked-by: Alex Chiang <achiang@...com>

This patch doesn't seem to have made it upstream.

Jesse, is it queued up in any of your trees?

thanks,

greg k-h

> 
> > Tested-by: Ingo Molnar <mingo@...e.hu>
> > Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
> > 
> > ---
> >  drivers/pci/hotplug/cpqphp_core.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > Index: linux-2.6-tip/drivers/pci/hotplug/cpqphp_core.c
> > ===================================================================
> > --- linux-2.6-tip.orig/drivers/pci/hotplug/cpqphp_core.c
> > +++ linux-2.6-tip/drivers/pci/hotplug/cpqphp_core.c
> > @@ -435,7 +435,7 @@ static int ctrl_slot_setup(struct contro
> >  				slot->number, ctrl->slot_device_offset,
> >  				slot_number);
> >  		result = pci_hp_register(hotplug_slot,
> > -					 ctrl->pci_dev->subordinate,
> > +					 ctrl->pci_dev->bus,
> >  					 slot->device);
> >  		if (result) {
> >  			err("pci_hp_register failed with error %d\n", result);
> > 
> 
> _______________________________________________
> stable mailing list
> stable@...ux.kernel.org
> http://linux.kernel.org/mailman/listinfo/stable
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