[Xen-devel] Possible shadow bug

[Igor Mammedov]

On 06/10/2011 12:10 PM, Tim Deegan wrote:
> At 11:01 +0100 on 10 Jun (1307703699), Tim Deegan wrote:
>> Actually, looking at the disassembly you posted, it looks more like it
>> might be an emulator bug in Xen; if Xen finds itself emulating the IMUL
>> instruction and either gets the logic wrong or does the memory access
>> wrong, it could cause that failure.  And one reason that Xen emulates
>> instructions is if the memory operand is on a pagetable that's shadowed
>> (which might be a page that was recently a pagetable).
>>
>> ISTR that even though the RHEL xen reports a 3.0.x version it has quite
>> a lot of backports in it.  Does it have this patch?
>> http://hg.uk.xensource.com/xen-3.1-testing.hg/rev/e8fca4c42d05
> Oops, that URL doesn't work; I meant this:
> http://xenbits.xen.org/xen-3.1-testing.hg/rev/e8fca4c42d05
>
> Tim.
>
Tim, Thank you very much!
We were missing that cs and it solved problem.

-- 
Thanks,
  Igor