From 7d2e8748af62b0de7c7bbcb0d62f937e88fd7027 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 27 May 2020 01:54:00 -0700 Subject: 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: e93fd3b3e89e9 ("KVM: x86/mmu: Capture TDP level when updating CPUID") Reported-by: syzbot+904752567107eefb728c@syzkaller.appspotmail.com Signed-off-by: Sean Christopherson Message-Id: <20200527085400.23759-1-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/x86.c | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/kvm/x86.c') diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 6d13e9d1bb75..329bdd2eb2cf 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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; -- cgit v1.2.3