From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Li RongQing <lirongqing@baidu.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] KVM: x86: Sanitize writes to MSR_KVM_PV_EOI_EN
Date: Mon, 8 Nov 2021 16:28:17 +0100 [thread overview]
Message-ID: <20211108152819.12485-1-vkuznets@redhat.com> (raw)
This is a continuation of work started by Li RongQing with
"[PATCH] KVM: x86: disable pv eoi if guest gives a wrong address":
https://lore.kernel.org/kvm/1636078404-48617-1-git-send-email-lirongqing@baidu.com/
Instead of resetting 'KVM_MSR_ENABLED' when a bogus address was written to
MSR_KVM_PV_EOI_EN I suggest we refuse to update MSR at all, this aligns
with #GP which is being injected on such writes.
Vitaly Kuznetsov (2):
KVM: x86: Rename kvm_lapic_enable_pv_eoi()
KVM: x86: Don't update vcpu->arch.pv_eoi.msr_val when a bogus value
was written to MSR_KVM_PV_EOI_EN
arch/x86/kvm/hyperv.c | 4 ++--
arch/x86/kvm/lapic.c | 23 ++++++++++++++---------
arch/x86/kvm/lapic.h | 2 +-
arch/x86/kvm/x86.c | 2 +-
4 files changed, 18 insertions(+), 13 deletions(-)
--
2.31.1
next reply other threads:[~2021-11-08 15:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-08 15:28 Vitaly Kuznetsov [this message]
2021-11-08 15:28 ` [PATCH 1/2] KVM: x86: Rename kvm_lapic_enable_pv_eoi() Vitaly Kuznetsov
2021-11-08 15:28 ` [PATCH 2/2] KVM: x86: Don't update vcpu->arch.pv_eoi.msr_val when a bogus value was written to MSR_KVM_PV_EOI_EN Vitaly Kuznetsov
2021-11-11 13:59 ` [PATCH 0/2] KVM: x86: Sanitize writes " Paolo Bonzini
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