From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 240BAC433E0 for ; Wed, 27 May 2020 08:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 00FA920723 for ; Wed, 27 May 2020 08:54:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388329AbgE0IyC (ORCPT ); Wed, 27 May 2020 04:54:02 -0400 Received: from mga17.intel.com ([192.55.52.151]:18477 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388019AbgE0IyC (ORCPT ); Wed, 27 May 2020 04:54:02 -0400 IronPort-SDR: NzUkZnxz/Kv4fBGO/iVWpVBiC27CNeS8BjFK3dXnmjVLc0VXMqVkw7qv228EKzHaCx6078gWKn U57p+20liE3w== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 May 2020 01:54:01 -0700 IronPort-SDR: X4MCtpRkLljsgR7+EkaTcY9qggKkR+7funFrhV7OCKkBeiyURWXENxtDHbdrLfTArkU5NtAPnL /hvq1Txw7Frg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,440,1583222400"; d="scan'208";a="284736246" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.152]) by orsmga002.jf.intel.com with ESMTP; 27 May 2020 01:54:01 -0700 From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, syzbot+904752567107eefb728c@syzkaller.appspotmail.com Subject: [PATCH] KVM: x86: Initialize tdp_level during vCPU creation Date: Wed, 27 May 2020 01:54:00 -0700 Message-Id: <20200527085400.23759-1-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.26.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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