Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932423AbbFCLqc (ORCPT ); Wed, 3 Jun 2015 07:46:32 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:56367 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754933AbbFCLom (ORCPT ); Wed, 3 Jun 2015 07:44:42 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiao Guangrong , Paolo Bonzini Subject: [PATCH 3.10 08/46] KVM: MMU: fix CR4.SMEP=1, CR0.WP=0 with shadow pages Date: Wed, 3 Jun 2015 20:42:46 +0900 Message-Id: <20150603063359.366360327@linuxfoundation.org> X-Mailer: git-send-email 2.4.2 In-Reply-To: <20150603063357.922683803@linuxfoundation.org> References: <20150603063357.922683803@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1334 Lines: 38 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paolo Bonzini commit 898761158be7682082955e3efa4ad24725305fc7 upstream. smep_andnot_wp is initialized in kvm_init_shadow_mmu and shadow pages should not be reused for different values of it. Thus, it has to be added to the mask in kvm_mmu_pte_write. Reviewed-by: Xiao Guangrong Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -3975,7 +3975,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu * ++vcpu->kvm->stat.mmu_pte_write; kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE); - mask.cr0_wp = mask.cr4_pae = mask.nxe = 1; + mask.cr0_wp = mask.cr4_pae = mask.nxe = mask.smep_andnot_wp = 1; for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn) { if (detect_write_misaligned(sp, gpa, bytes) || detect_write_flooding(sp)) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/