Commit 7d2e8748 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: x86: Initialize tdp_level during vCPU creation 



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

Fixes: e93fd3b3 ("KVM: x86/mmu: Capture TDP level when updating CPUID")
Reported-by: default avatar <syzbot+904752567107eefb728c@syzkaller.appspotmail.com>
Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200527085400.23759-1-sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 6c0238c4

arch/x86/kvm/x86.c

+1 −0
Original line number Diff line number Diff line
@@ -9418,6 +9418,7 @@ 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;