[PATCH] KVM: x86: Initialize tdp_level during vCPU creation

[Sean Christopherson]

Initialize vcpu->arch.tdp_level during vCPU creation to avoid consuming
garbage if userspace calls KVM_RUN without first calling KVM_SET_CPUID.

Fixes: e93fd3b3e89e9 ("KVM: x86/mmu: Capture TDP level when updating CPUID")
Reported-by: syzbot+904752567107eefb7...@syzkaller.appspotmail.com
Signed-off-by: Sean Christopherson <sean.j.christopher...@intel.com>
---
 arch/x86/kvm/x86.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b226fb8abe41b..01a6304056197 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9414,6 +9414,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
        fx_init(vcpu);
 
        vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
+       vcpu->arch.tdp_level = kvm_x86_ops.get_tdp_level(vcpu);
 
        vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT;
 
-- 
2.26.0