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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 42572C433B4 for ; Wed, 12 May 2021 10:38:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 053E961289 for ; Wed, 12 May 2021 10:38:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230183AbhELKkD (ORCPT ); Wed, 12 May 2021 06:40:03 -0400 Received: from wforward4-smtp.messagingengine.com ([64.147.123.34]:60611 "EHLO wforward4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230096AbhELKkD (ORCPT ); Wed, 12 May 2021 06:40:03 -0400 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailforward.west.internal (Postfix) with ESMTP id 22A4A12D8; Wed, 12 May 2021 06:38:55 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Wed, 12 May 2021 06:38:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=8ihTL7 BMs6wYIj5CeOTV5vbQ2x9Vm3jMKWU5O4FrV+4=; b=jLcptYFVHpc7qZZHHWnytY 4WSLO1LHahI2ToR1hRHaR5ocEpqTIF2C6WOGXmPQs1cduR1FnpIvMkZOo/LfpW/l lGkWd/HZDdSjJuuPwn1SibDiqGyOjdC3Ai1uoK8NOnFkHp4MgUWacRRqz+qHrc4S M+3FH3bWLhMYqlxWYdlmkGC17g29dMl9U7XyWb9llZMbOYCAQ7Ok99G/yKQ2VJNg HeOH+f8nOHhXKf2apT6v0xRiudXBMH6kmFcFDEeFulIgB/1akpqoQvWaw3X9P+QG 3aUAiwoIgvaLl6cKe8tifikrem4O4KRdCuEwLfnocFLaf0W/Y2jYE2soxROretgw == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrvdehvddgvdekucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefuvffhfffkgggtgfesthekredttd dtlfenucfhrhhomhepoehgrhgvghhkhheslhhinhhugihfohhunhgurghtihhonhdrohhr gheqnecuggftrfgrthhtvghrnhepieetveehuedvhfdtgfdvieeiheehfeelveevheejud etveeuveeludejjefgteehnecukfhppeekfedrkeeirdejgedrieegnecuvehluhhsthgv rhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepghhrvghgsehkrhhorghhrd gtohhm X-ME-Proxy: Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 12 May 2021 06:38:54 -0400 (EDT) Subject: FAILED: patch "[PATCH] KVM: x86: Check CR3 GPA for validity regardless of vCPU mode" failed to apply to 4.9-stable tree To: seanjc@google.com, pbonzini@redhat.com Cc: From: Date: Wed, 12 May 2021 12:38:44 +0200 Message-ID: <1620815924109235@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 886bbcc7a523b8d4fac60f1015d2e0fcad50db82 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 21 Apr 2021 19:21:21 -0700 Subject: [PATCH] KVM: x86: Check CR3 GPA for validity regardless of vCPU mode Check CR3 for an invalid GPA even if the vCPU isn't in long mode. For bigger emulation flows, notably RSM, the vCPU mode may not be accurate if CR0/CR4 are loaded after CR3. For MOV CR3 and similar flows, the caller is responsible for truncating the value. Fixes: 660a5d517aaa ("KVM: x86: save/load state on SMM switch") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson Message-Id: <20210422022128.3464144-3-seanjc@google.com> Signed-off-by: Paolo Bonzini diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 4c9c9592a437..3010284dc59b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1077,10 +1077,15 @@ int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) return 0; } - if (is_long_mode(vcpu) && kvm_vcpu_is_illegal_gpa(vcpu, cr3)) + /* + * Do not condition the GPA check on long mode, this helper is used to + * stuff CR3, e.g. for RSM emulation, and there is no guarantee that + * the current vCPU mode is accurate. + */ + if (kvm_vcpu_is_illegal_gpa(vcpu, cr3)) return 1; - else if (is_pae_paging(vcpu) && - !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) + + if (is_pae_paging(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) return 1; kvm_mmu_new_pgd(vcpu, cr3, skip_tlb_flush, skip_tlb_flush);