From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
Sean Christopherson <seanjc@google.com>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Maxim Levitsky <mlevitsk@redhat.com>,
stable@vger.kernel.org
Subject: [PATCH 1/4] KVM: x86: nSVM: leave nested mode on vCPU free
Date: Thu, 20 Oct 2022 12:30:52 +0300 [thread overview]
Message-ID: <20221020093055.224317-2-mlevitsk@redhat.com> (raw)
In-Reply-To: <20221020093055.224317-1-mlevitsk@redhat.com>
If the VM was terminated while nested, we free the nested state
while the vCPU still is in nested mode.
Soon a warning will be added for this condition.
Cc: stable@vger.kernel.org
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
arch/x86/kvm/svm/svm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 58f0077d935799..958faa8807f52b 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1439,6 +1439,7 @@ static void svm_vcpu_free(struct kvm_vcpu *vcpu)
*/
svm_clear_current_vmcb(svm->vmcb);
+ svm_leave_nested(vcpu);
svm_free_nested(svm);
sev_free_vcpu(vcpu);
--
2.26.3
next prev parent reply other threads:[~2022-10-20 9:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 9:30 [PATCH 0/4] nSVM: fix L0 crash if L2 has shutdown condtion which L1 doesn't intercept Maxim Levitsky
2022-10-20 9:30 ` Maxim Levitsky [this message]
2022-10-20 9:30 ` [PATCH 2/4] KVM: x86: nSVM: harden svm_free_nested against freeing vmcb02 while still in use Maxim Levitsky
2022-10-20 9:30 ` [PATCH 3/4] KVM: x86: add kvm_leave_nested Maxim Levitsky
2022-10-20 9:30 ` [PATCH 4/4] KVM: x86: forcibly leave nested mode on vCPU reset Maxim Levitsky
2022-10-20 15:33 ` Sean Christopherson
2022-10-25 13:37 ` Maxim Levitsky
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