Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6 KVM

From	Paolo Bonzini <pbonzini@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6 KVM
Date	2016-03-19 11:00 +0100
Message-ID	<relPR-6uw-23@gated-at.bofh.it> (permalink)
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On 18/03/2016 19:04, David Matlack wrote:
> > the tests would effectively DoS the host.
>
> How does this DoS the host? The guest is stuck executing the same
> instruction over and over, but it's exiting to KVM every time,
> allowing KVM to reschedule the VCPU. I would agree it DoSes the guest.

You're right, these tests are safe.

Paolo

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[PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6 KVM Paolo Bonzini <pbonzini@redhat.com> - 2016-03-18 17:20 +0100
  [PATCH 2/3] KVM: VMX: avoid guest hang on invalid invvpid instruction Paolo Bonzini <pbonzini@redhat.com> - 2016-03-18 17:20 +0100
  [PATCH 3/3] KVM: VMX: fix nested vpid for old KVM guests Paolo Bonzini <pbonzini@redhat.com> - 2016-03-18 17:20 +0100
  [PATCH 1/3] KVM: VMX: avoid guest hang on invalid invept instruction Paolo Bonzini <pbonzini@redhat.com> - 2016-03-18 17:20 +0100
  Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6 KVM David Matlack <dmatlack@google.com> - 2016-03-18 18:50 +0100
    Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6  KVM Paolo Bonzini <pbonzini@redhat.com> - 2016-03-18 19:00 +0100
      Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6 KVM David Matlack <dmatlack@google.com> - 2016-03-18 19:10 +0100
        Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6  KVM Paolo Bonzini <pbonzini@redhat.com> - 2016-03-19 11:00 +0100

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