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From: Maxim Levitsky <mlevitsk@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	kvm@vger.kernel.org
Cc: Sean Christopherson <seanjc@google.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>,
	Cathy Avery <cavery@redhat.com>,
	Emanuele Giuseppe Esposito <eesposit@redhat.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Michael Roth <mdroth@linux.vnet.ibm.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/6] KVM: nSVM: Check the value written to MSR_VM_HSAVE_PA
Date: Fri, 09 Jul 2021 09:08:43 +0300	[thread overview]
Message-ID: <67e2e6b4fcbc2ec0bdda1e1af1cfe61d3c1fde6f.camel@redhat.com> (raw)
In-Reply-To: <4318c980-6eff-7b74-ae99-b3210021789d@redhat.com>

On Thu, 2021-07-08 at 19:27 +0200, Paolo Bonzini wrote:
> On 07/07/21 12:28, Maxim Levitsky wrote:
> > Minor nitpick: I would have checked the host provided value as well,
> > just in case since there is no reason why it won't pass the same check,
> > and fail if the value is not aligned.
> 
> The reason not to do so is that it would allow a guest running an old 
> kernel to defeat live migration.
I understand now, and I will keep this in mind next time.

Best regards,
	Maxim Levitsky

> 
> Paolo
> 
> > Other than that:
> > Reviewed-by: Maxim Levitsky<mlevitsk@redhat.com>



  reply	other threads:[~2021-07-09  6:08 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-28 10:44 [PATCH 0/6] KVM: nSVM: Fix issues when SMM is entered from L2 Vitaly Kuznetsov
2021-06-28 10:44 ` [PATCH 1/6] KVM: nSVM: Check the value written to MSR_VM_HSAVE_PA Vitaly Kuznetsov
2021-07-07 10:28   ` Maxim Levitsky
2021-07-08 17:27     ` Paolo Bonzini
2021-07-09  6:08       ` Maxim Levitsky [this message]
2021-06-28 10:44 ` [PATCH 2/6] KVM: nSVM: Check that VM_HSAVE_PA MSR was set before VMRUN Vitaly Kuznetsov
2021-07-07 10:28   ` Maxim Levitsky
2021-06-28 10:44 ` [PATCH 3/6] KVM: nSVM: Introduce svm_copy_nonvmloadsave_state() Vitaly Kuznetsov
2021-07-05 12:08   ` Paolo Bonzini
2021-07-07 10:29     ` Maxim Levitsky
2021-06-28 10:44 ` [PATCH 4/6] KVM: nSVM: Fix L1 state corruption upon return from SMM Vitaly Kuznetsov
2021-07-07 10:32   ` Maxim Levitsky
2021-06-28 10:44 ` [PATCH 5/6] KVM: nSVM: Restore nested control upon leaving SMM Vitaly Kuznetsov
2021-07-07 10:35   ` Maxim Levitsky
2021-06-28 10:44 ` [PATCH 6/6] KVM: selftests: smm_test: Test SMM enter from L2 Vitaly Kuznetsov
2021-07-07 10:35   ` Maxim Levitsky
2021-07-08 17:40 ` [PATCH 0/6] KVM: nSVM: Fix issues when SMM is entered " Paolo Bonzini

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