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=-9.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,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 113E9C282DD for ; Thu, 23 May 2019 19:13:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DDB292133D for ; Thu, 23 May 2019 19:13:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558638791; bh=UY8SQeHd7FCBBneJtTyKQp5Ic9+zcQhEBd8HXBbyPCc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YJaeaLPOwdQDt+v5YCiZonECdHegXIsZgIjpeLLgGEq+ju96nMeWtIS0hYwQa37gg 6u/uYGQykOZZzpybVQ45D0rjK8UiJMBq6dVfdmzdnQE/QdJ272ostByVMvZlz9AtLA R5ibW9D9epZ3oLy2mjj6E9IwbbHPquntddMZOd2k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388528AbfEWTNL (ORCPT ); Thu, 23 May 2019 15:13:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:47000 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388510AbfEWTNJ (ORCPT ); Thu, 23 May 2019 15:13:09 -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 CA32E217D9; Thu, 23 May 2019 19:13:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558638788; bh=UY8SQeHd7FCBBneJtTyKQp5Ic9+zcQhEBd8HXBbyPCc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=atfqW5YD0D2Hn7lgl1kEIi7Ne9S5O5pW8uDSTyf21ah68r3nzSQqB8G6sB7TYB4I4 lqtTp6FvjYmDyhPwAoJLVfSVyvtF3rJkXjiuHfrpH4cv3yXKx2/gTW83fGqILolPsM ksQyGVNojG28h1Hp5rk6yV29weU1meAg0Afj6Zck= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrew Jones , Marc Zyngier , Sasha Levin Subject: [PATCH 4.14 65/77] KVM: arm/arm64: Ensure vcpu target is unset on reset failure Date: Thu, 23 May 2019 21:06:23 +0200 Message-Id: <20190523181728.972641334@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190523181719.982121681@linuxfoundation.org> References: <20190523181719.982121681@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 811328fc3222f7b55846de0cd0404339e2e1e6d7 ] A failed KVM_ARM_VCPU_INIT should not set the vcpu target, as the vcpu target is used by kvm_vcpu_initialized() to determine if other vcpu ioctls may proceed. We need to set the target before calling kvm_reset_vcpu(), but if that call fails, we should then unset it and clear the feature bitmap while we're at it. Signed-off-by: Andrew Jones [maz: Simplified patch, completed commit message] Signed-off-by: Marc Zyngier Signed-off-by: Sasha Levin --- virt/kvm/arm/arm.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 32aa88c19b8d5..4154f98b337c5 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -856,7 +856,7 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init) { - unsigned int i; + unsigned int i, ret; int phys_target = kvm_target_cpu(); if (init->target != phys_target) @@ -891,9 +891,14 @@ static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, vcpu->arch.target = phys_target; /* Now we know what it is, we can reset it. */ - return kvm_reset_vcpu(vcpu); -} + ret = kvm_reset_vcpu(vcpu); + if (ret) { + vcpu->arch.target = -1; + bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); + } + return ret; +} static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init) -- 2.20.1