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 99322C433F5 for ; Mon, 25 Oct 2021 19:54:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8323260187 for ; Mon, 25 Oct 2021 19:54:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239570AbhJYT5P (ORCPT ); Mon, 25 Oct 2021 15:57:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:42474 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237340AbhJYTwj (ORCPT ); Mon, 25 Oct 2021 15:52:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5699A6113E; Mon, 25 Oct 2021 19:43:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635191031; bh=Fakm2LNz3isYtSaSCUdlCrJmZFgluWjBbJuA0mEu4I0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O1ggvizT3wb8f8bHrkdL74q0KivRmuRlI4vw18Af611w02Cv5U21IUfxKpduipJp3 uzvAyDam9GnXw3JjhRYqrB696KIKkYwB8dxzmZ0y5EYbz+rkP4jzIHf2g4v0lJFRyY qkQafqDVLUCTvQQqP33fxFA8E9PuRQP9zuUEgI4k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tom Lendacky , Paolo Bonzini Subject: [PATCH 5.14 109/169] KVM: SEV-ES: fix length of string I/O Date: Mon, 25 Oct 2021 21:14:50 +0200 Message-Id: <20211025191031.878969762@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211025191017.756020307@linuxfoundation.org> References: <20211025191017.756020307@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: Paolo Bonzini commit 019057bd73d1751fdfec41e43148baf3303d98f9 upstream. The size of the data in the scratch buffer is not divided by the size of each port I/O operation, so vcpu->arch.pio.count ends up being larger than it should be by a factor of size. Cc: stable@vger.kernel.org Fixes: 7ed9abfe8e9f ("KVM: SVM: Support string IO operations for an SEV-ES guest") Acked-by: Tom Lendacky 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 @@ -2591,7 +2591,7 @@ int sev_es_string_io(struct vcpu_svm *sv return -EINVAL; return kvm_sev_es_string_io(&svm->vcpu, size, port, - svm->ghcb_sa, svm->ghcb_sa_len, in); + svm->ghcb_sa, svm->ghcb_sa_len / size, in); } void sev_es_init_vmcb(struct vcpu_svm *svm)