Re: [Xen-devel] Xen fixes for 3.10.y

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 20/02/14 20:13, Greg Kroah-Hartman wrote:
> On Thu, Feb 20, 2014 at 10:51:24AM +0000, David Vrabel wrote:
>> These two changes fix important bugs with 32-bit Xen PV guests.
>>
>> 0160676bba69523e8b0ac83f306cce7d342ed7c8 (xen/p2m: check MFN is in range
>> before using the m2p table)
> 
> Now applied.
> 
>> 7cde9b27e7b3a2e09d647bb4f6d94e842698d2d5 (xen: Fix possible user space
>> selector corruption)
> 
> I had to edit this by-hand to get it to apply, can you verify I got it right?

I can't find where you put it.  But if it looks like this, it's ok.

--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -245,6 +245,15 @@ static void __init xen_smp_prepare_boot_cpu(void)
           old memory can be recycled */
        make_lowmem_page_readwrite(xen_initial_gdt);

+#ifdef CONFIG_X86_32
+       /*
+        * Xen starts us with XEN_FLAT_RING1_DS, but linux code
+        * expects __USER_DS
+        */
+       loadsegment(ds, __USER_DS);
+       loadsegment(es, __USER_DS);
+#endif
+
        xen_filter_cpu_maps();
        xen_setup_vcpu_info_placement();
 }

Thanks.

David

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