From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:59528 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933210AbdEWRps (ORCPT ); Tue, 23 May 2017 13:45:48 -0400 Subject: Patch "kvm: arm/arm64: Force reading uncached stage2 PGD" has been added to the 4.11-stable tree To: suzuki.poulose@arm.com, cdall@linaro.org, gregkh@linuxfoundation.org, marc.zyngier@arm.com Cc: , From: Date: Tue, 23 May 2017 19:45:30 +0200 Message-ID: <149556153019918@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled kvm: arm/arm64: Force reading uncached stage2 PGD to the 4.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kvm-arm-arm64-force-reading-uncached-stage2-pgd.patch and it can be found in the queue-4.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 2952a6070e07ebdd5896f1f5b861acad677caded Mon Sep 17 00:00:00 2001 From: Suzuki K Poulose Date: Tue, 16 May 2017 10:34:54 +0100 Subject: kvm: arm/arm64: Force reading uncached stage2 PGD From: Suzuki K Poulose commit 2952a6070e07ebdd5896f1f5b861acad677caded upstream. Make sure we don't use a cached value of the KVM stage2 PGD while resetting the PGD. Cc: Marc Zyngier Signed-off-by: Suzuki K Poulose Reviewed-by: Christoffer Dall Signed-off-by: Christoffer Dall Signed-off-by: Greg Kroah-Hartman --- arch/arm/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -844,7 +844,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm spin_lock(&kvm->mmu_lock); if (kvm->arch.pgd) { unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE); - pgd = kvm->arch.pgd; + pgd = READ_ONCE(kvm->arch.pgd); kvm->arch.pgd = NULL; } spin_unlock(&kvm->mmu_lock); Patches currently in stable-queue which might be from suzuki.poulose@arm.com are queue-4.11/kvm-arm-arm64-force-reading-uncached-stage2-pgd.patch queue-4.11/kvm-arm-arm64-fix-race-in-resetting-stage2-pgd.patch queue-4.11/kvm-arm-arm64-fix-use-after-free-of-stage2-page-table.patch