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SubjectRe: [PATCH] KVM: X86: Fix SMRAM accessing even if VM is shutdown
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On 02/09/2018 08:42 PM, Paolo Bonzini wrote:
> On 09/02/2018 04:22, Xiao Guangrong wrote:
>>>
>>
>> That is a good question... :)
>>
>> This case (with KVM_MEMSLOT_INVALID is set) can be easily constructed,
>> userspace should avoid this case by itself (avoiding vCPU accessing the
>> memslot which is being updated). If it happens, it's a operation issue
>> rather than INTERNAL ERROR.
>>
>> Maybe treat it as MMIO accessing and return to userspace with MMIO_EXIT
>> is a better solution...
>
> Yeah, that's what emulation would do (except if it's an instruction
> fetch, which will cause emulation to fail). I think it's a bug in the
> non-EPT #PF case that we return with -EFAULT.

Wanpeng, could you please do it? :)

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