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=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 E35FFC5CFFE for ; Mon, 10 Dec 2018 19:47:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABA4D20672 for ; Mon, 10 Dec 2018 19:47:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABA4D20672 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729584AbeLJTrE (ORCPT ); Mon, 10 Dec 2018 14:47:04 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:43442 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726962AbeLJTrE (ORCPT ); Mon, 10 Dec 2018 14:47:04 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::bf5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 8673F14738177; Mon, 10 Dec 2018 11:47:03 -0800 (PST) Date: Mon, 10 Dec 2018 11:47:02 -0800 (PST) Message-Id: <20181210.114702.127499839186553253.davem@davemloft.net> To: jasowang@redhat.com Cc: mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net 0/4] Fix various issue of vhost From: David Miller In-Reply-To: <20181210094454.21144-1-jasowang@redhat.com> References: <20181210094454.21144-1-jasowang@redhat.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 10 Dec 2018 11:47:03 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Wang Date: Mon, 10 Dec 2018 17:44:50 +0800 > This series tries to fix various issues of vhost: > > - Patch 1 adds a missing write barrier between used idx updating and > logging. > - Patch 2-3 brings back the protection of device IOTLB through vq > mutex, this fixes possible use after free in device IOTLB entries. > - Patch 4 fixes the diry page logging when device IOTLB is > enabled. We should done through GPA instead of GIOVA, this was done > through logging through iovec and traversing GPA->HPA list for the > GPA. > > Please consider them for -stable. Looks like the kbuild robot found some problems. ->used is a pointer (which might be 32-bit) and you're casting it to a u64 in the translate_desc() calls of patch #4. Please make sure that you don't actually require the full domain of a u64 in these values, as obviously if vq->used is a pointer you will only get a 32-bit domain on 32-bit architectures.