linux-kernel - Re: [PATCH 3/3] VFIO V4: VFIO driver: Non-privileged user level PCI drivers

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Message-Id: <201009231233.52541.pugs@cisco.com>
Date:	Thu, 23 Sep 2010 12:33:52 -0700
From:	Tom Lyon <pugs@...co.com>
To:	Andy Walls <awalls@...metrocast.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] VFIO V4: VFIO driver: Non-privileged user level PCI drivers

On Thursday, September 23, 2010 05:58:01 am Andy Walls wrote:

> Hi Tom,
> 
> pci_iomap() can possibly return NULL here and also in
> vfio_mem_readwrite().  Even if there are no security implications
> (unintended access to low I/O ports?), I think you still have potential
> for an Oops in the code below.
> 
> ... unless there's a reason why pci_iomap() can't possibly return NULL
> in these instances.  Maybe I'm missing something.
> 
> Regards,
> Andy

Thanks for the catch.
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