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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94F30C4332F for ; Mon, 4 Oct 2021 13:32:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7B17261166 for ; Mon, 4 Oct 2021 13:32:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237326AbhJDNeH (ORCPT ); Mon, 4 Oct 2021 09:34:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:47354 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237081AbhJDNbq (ORCPT ); Mon, 4 Oct 2021 09:31:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id F19966321E; Mon, 4 Oct 2021 13:14:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1633353259; bh=JRoqL4otUIGnStRHpXKpJPWH28/NtpXgHSdIf/lXCvE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bp7yNDauNR59ecg6mAFRRR5TlisLaBeu6MNMzLwSLOGCET9DMWDeaxwjsgsEEbjzf MojANW3lvaP28XYDT28IYUaAm84/lvJ2pdNznqDZW571z4/YfrrOzTt6n0ZkvKoodT 4kPQZ6aGLr1WDsSM/0iQDoMCPgDJYrPhQjEDzdrg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Gonda , Marc Orr , Tom Lendacky , Brijesh Singh , Sean Christopherson , Paolo Bonzini Subject: [PATCH 5.14 056/172] KVM: SEV: Pin guest memory for write for RECEIVE_UPDATE_DATA Date: Mon, 4 Oct 2021 14:51:46 +0200 Message-Id: <20211004125046.804042551@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211004125044.945314266@linuxfoundation.org> References: <20211004125044.945314266@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sean Christopherson commit 50c038018d6be20361e8a2890262746a4ac5b11f upstream. Require the target guest page to be writable when pinning memory for RECEIVE_UPDATE_DATA. Per the SEV API, the PSP writes to guest memory: The result is then encrypted with GCTX.VEK and written to the memory pointed to by GUEST_PADDR field. Fixes: 15fb7de1a7f5 ("KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command") Cc: stable@vger.kernel.org Cc: Peter Gonda Cc: Marc Orr Cc: Tom Lendacky Cc: Brijesh Singh Signed-off-by: Sean Christopherson Message-Id: <20210914210951.2994260-2-seanjc@google.com> Reviewed-by: Brijesh Singh Reviewed-by: Peter Gonda Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/svm/sev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -1465,7 +1465,7 @@ static int sev_receive_update_data(struc /* Pin guest memory */ guest_page = sev_pin_memory(kvm, params.guest_uaddr & PAGE_MASK, - PAGE_SIZE, &n, 0); + PAGE_SIZE, &n, 1); if (IS_ERR(guest_page)) { ret = PTR_ERR(guest_page); goto e_free_trans;