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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,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 7F8BEC28EBD for ; Sun, 9 Jun 2019 16:58:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D1C8206C3 for ; Sun, 9 Jun 2019 16:58:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099520; bh=BLvizyt5N/SaXOQfgvkBH8gSap72tLlCkXBrOTyV/GM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ePktgXQ26qYkZYaN/yi8MZ6ROObyafaPlbtd0Fz2VhIiE7V35NR/RFQygayVKx8aE 8shKFvB+o71uapiG3LvnFSgCZivee7zJXveXLU4bKB1RSfVODBt70JHW7Fh0/pA9OY 5+X1WH+cZf0uYd5stlu4RlOPuyGshSCypPb29gDQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387509AbfFIQ6j (ORCPT ); Sun, 9 Jun 2019 12:58:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:33940 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387493AbfFIQ6g (ORCPT ); Sun, 9 Jun 2019 12:58:36 -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 D17A8206DF; Sun, 9 Jun 2019 16:58:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099515; bh=BLvizyt5N/SaXOQfgvkBH8gSap72tLlCkXBrOTyV/GM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HDcLBtF2qNizOZeBCF15B51bKvfEhUXQgDavOCEoTThbF5IFqopyyp+9CsYUXDlax 6tMh/TX31GjLwQ8RmsPW3lKBbbV9VSn09M/3Ok1WSWGnvkhKgirBh6Clj4+++BVkgN ctNJQp/eJaB1nlTvcnOn8MewLUCuVoGezMQRGdwA= 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 4.4 068/241] KVM: arm/arm64: Ensure vcpu target is unset on reset failure Date: Sun, 9 Jun 2019 18:40:10 +0200 Message-Id: <20190609164149.739074498@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190609164147.729157653@linuxfoundation.org> References: <20190609164147.729157653@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 --- arch/arm/kvm/arm.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -744,7 +744,7 @@ int kvm_vm_ioctl_irq_line(struct kvm *kv 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) @@ -779,9 +779,14 @@ static int kvm_vcpu_set_target(struct kv 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)