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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 4AB8BC433E0 for ; Mon, 18 May 2020 17:46:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1FF6620715 for ; Mon, 18 May 2020 17:46:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589823984; bh=mBawSD8zkHBMF5n1BRmQOVnLra3BFmatr3Y/TIxOxeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=fgqNeEiIzRpqyA+1hNW7tyfop9av/3r3YUmpQ96blAgCzEUGpyGbg51u45+ZBFDxo oZ73UV1AidZAYi0y2zVXfNXfQ9CyjsllTmZh6/mriAu/d4/1Jxwr5Ag7fmdoMORvpN nF8ozmO759ePbM2fXwosOKXBAFYh9qpX2Feazolo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729541AbgERRqX (ORCPT ); Mon, 18 May 2020 13:46:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:45880 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729535AbgERRqU (ORCPT ); Mon, 18 May 2020 13:46:20 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3257620715; Mon, 18 May 2020 17:46:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589823979; bh=mBawSD8zkHBMF5n1BRmQOVnLra3BFmatr3Y/TIxOxeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xngi7dSWOxgv82Rj1as/S9n2fG6hVbHz9G0pmKQUntL9ahDHqipfRZAleRx11DIA+ 3G3f7PmmhvtxJT68YkG+wZn/fx/DJNkV61lxltygbYXH4OuS0vI4bbDH9JgKX/2oAR vfy6nNJaMPXlwQbMo5W7o5zhRCTDZLbFBA/FGTZ4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Andr=C3=A9=20Przywara?= , Marc Zyngier Subject: [PATCH 4.14 022/114] KVM: arm: vgic: Fix limit condition when writing to GICD_I[CS]ACTIVER Date: Mon, 18 May 2020 19:35:54 +0200 Message-Id: <20200518173507.737668504@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200518173503.033975649@linuxfoundation.org> References: <20200518173503.033975649@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marc Zyngier commit 1c32ca5dc6d00012f0c964e5fdd7042fcc71efb1 upstream. When deciding whether a guest has to be stopped we check whether this is a private interrupt or not. Unfortunately, there's an off-by-one bug here, and we fail to recognize a whole range of interrupts as being global (GICv2 SPIs 32-63). Fix the condition from > to be >=. Cc: stable@vger.kernel.org Fixes: abd7229626b93 ("KVM: arm/arm64: Simplify active_change_prepare and plug race") Reported-by: André Przywara Signed-off-by: Marc Zyngier Signed-off-by: Greg Kroah-Hartman --- virt/kvm/arm/vgic/vgic-mmio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/virt/kvm/arm/vgic/vgic-mmio.c +++ b/virt/kvm/arm/vgic/vgic-mmio.c @@ -260,7 +260,7 @@ static void vgic_mmio_change_active(stru static void vgic_change_active_prepare(struct kvm_vcpu *vcpu, u32 intid) { if (vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3 || - intid > VGIC_NR_PRIVATE_IRQS) + intid >= VGIC_NR_PRIVATE_IRQS) kvm_arm_halt_guest(vcpu->kvm); } @@ -268,7 +268,7 @@ static void vgic_change_active_prepare(s static void vgic_change_active_finish(struct kvm_vcpu *vcpu, u32 intid) { if (vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3 || - intid > VGIC_NR_PRIVATE_IRQS) + intid >= VGIC_NR_PRIVATE_IRQS) kvm_arm_resume_guest(vcpu->kvm); }