Re: [Xen-ia64-devel] [PATCH][Linux] fix vulnerability of privcmd_mmap

[Alex Williamson <alex.williamson@xxxxxx>]

On Thu, 2008-02-21 at 17:42 +0900, Kouya Shimura wrote:
> Hi,
> 
> empty_zero_page can be polluted by writing to a page
> through privcmd_mmap(). 
> i.e. a user program can hang a privileged domain (dom0),
> although root privilege is required.
> 
> An attached patch fixes it. resetting the VM_PFNMAP flag
> is a little bit kludge. Is there any better solution?
> 
> After this patch is applied, other patches to Qemu become
> necessary to create a HVM domain. I'll post them later.

   Applied.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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