From patchwork Wed May 12 14:43:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 438361 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 BD2F1C43461 for ; Wed, 12 May 2021 16:01:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 82B3561E14 for ; Wed, 12 May 2021 16:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236806AbhELQCQ (ORCPT ); Wed, 12 May 2021 12:02:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:34658 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238112AbhELP5W (ORCPT ); Wed, 12 May 2021 11:57:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 25F9A61CB0; Wed, 12 May 2021 15:30:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620833419; bh=/k805jO32RGiOlBu8HnZojudGEJY8laJl1v8kCPUf8I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R2BGWYU16tlSMz6g+aoD5+KKyWGLTQg/nFmaUeLTfHAxEaTyCabhfyUQJy27Tgsei m3WSUzojwfBf7/NTS/TWYPL0XALHgUIj7wyv4U6uNOweEaLe13Gqb8DR+jeSN6M+pU MIWlf1tGnLr5DWiEKX+lIYu3wx21dJfyuUadktwo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sean Christopherson , Paolo Bonzini Subject: [PATCH 5.11 107/601] KVM: nVMX: Truncate base/index GPR value on address calc in !64-bit Date: Wed, 12 May 2021 16:43:04 +0200 Message-Id: <20210512144831.365868168@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sean Christopherson commit 82277eeed65eed6c6ee5b8f97bd978763eab148f upstream. Drop bits 63:32 of the base and/or index GPRs when calculating the effective address of a VMX instruction memory operand. Outside of 64-bit mode, memory encodings are strictly limited to E*X and below. Fixes: 064aea774768 ("KVM: nVMX: Decoding memory operands of VMX instructions") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson Message-Id: <20210422022128.3464144-7-seanjc@google.com> Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/vmx/nested.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -4639,9 +4639,9 @@ int get_vmx_mem_address(struct kvm_vcpu else if (addr_size == 0) off = (gva_t)sign_extend64(off, 15); if (base_is_valid) - off += kvm_register_read(vcpu, base_reg); + off += kvm_register_readl(vcpu, base_reg); if (index_is_valid) - off += kvm_register_read(vcpu, index_reg) << scaling; + off += kvm_register_readl(vcpu, index_reg) << scaling; vmx_get_segment(vcpu, &s, seg_reg); /*