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Subject: Re: [Xen-devel] [PATCH 4/4] xen/pcifront: Fix mysterious crashes when
 NUMA locality information was extracted.
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Tommi Airikka <tommi@airikka.net>,
	<linux-kernel@vger.kernel.org>, <xen-devel@lists.xenproject.org>,
	<david.vrabel@citrix.com>, <boris.ostrovsky@oracle.com>
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From: David Vrabel <david.vrabel@citrix.com>
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Date: Mon, 15 Feb 2016 14:27:14 +0000
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On 11/02/16 21:10, Konrad Rzeszutek Wilk wrote:
> --- a/drivers/pci/xen-pcifront.c
> +++ b/drivers/pci/xen-pcifront.c

> @@ -576,6 +578,7 @@ static void pcifront_free_roots(struct pcifront_device *pdev)
>  		free_root_bus_devs(bus_entry->bus);
>  
>  		kfree(bus_entry->bus->sysdata);
> +		bus_entry->bus->sysdata = NULL;

I dropped this change, as it was unrelated.

I note that we free sysdata before removing the bus which looks racy to me.

David