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=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E974EC2B9F4 for ; Mon, 14 Jun 2021 10:35:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D00CA6142F for ; Mon, 14 Jun 2021 10:35:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233539AbhFNKhP (ORCPT ); Mon, 14 Jun 2021 06:37:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:40118 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233197AbhFNKea (ORCPT ); Mon, 14 Jun 2021 06:34:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6627D61356; Mon, 14 Jun 2021 10:31:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623666718; bh=5bqUyuGC4qPAzcsbT4hkqG7eCZ5cUtOm6k0n5Fu7zvY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JkIg3n3gr6Qyb/qhcmBRUVah5XVM9EAHxUimGbfnSV5gwjD1xpLl93Ur20HblxbpX qgq43OC3u7uTZelmQQ58b1y+ppwsqLoxvcwARt73Hi/ZNHove8ylT3Qg6LFtlYtN3k Sac1pM7mNem/eWDAz3njAi1sX5LEZ7I/yzTndPyM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Paolo Bonzini Subject: [PATCH 4.9 37/42] kvm: fix previous commit for 32-bit builds Date: Mon, 14 Jun 2021 12:27:28 +0200 Message-Id: <20210614102643.881341114@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210614102642.700712386@linuxfoundation.org> References: <20210614102642.700712386@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 4422829e8053068e0225e4d0ef42dc41ea7c9ef5 upstream. array_index_nospec does not work for uint64_t on 32-bit builds. However, the size of a memory slot must be less than 20 bits wide on those system, since the memory slot must fit in the user address space. So just store it in an unsigned long. Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- include/linux/kvm_host.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -939,8 +939,8 @@ __gfn_to_hva_memslot(struct kvm_memory_s * table walks, do not let the processor speculate loads outside * the guest's registered memslots. */ - unsigned long offset = array_index_nospec(gfn - slot->base_gfn, - slot->npages); + unsigned long offset = gfn - slot->base_gfn; + offset = array_index_nospec(offset, slot->npages); return slot->userspace_addr + offset * PAGE_SIZE; }