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 14CB8C04EB8 for ; Tue, 11 Dec 2018 03:01:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C694D2081B for ; Tue, 11 Dec 2018 03:01:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C694D2081B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com 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 S1729786AbeLKDBm (ORCPT ); Mon, 10 Dec 2018 22:01:42 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36012 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729149AbeLKDBl (ORCPT ); Mon, 10 Dec 2018 22:01:41 -0500 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6EE0236883; Tue, 11 Dec 2018 03:01:41 +0000 (UTC) Received: from [10.72.12.184] (ovpn-12-184.pek2.redhat.com [10.72.12.184]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B312B101963B; Tue, 11 Dec 2018 03:01:30 +0000 (UTC) Subject: Re: [PATCH net 0/4] Fix various issue of vhost To: David Miller Cc: mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <20181210094454.21144-1-jasowang@redhat.com> <20181210.114702.127499839186553253.davem@davemloft.net> From: Jason Wang Message-ID: Date: Tue, 11 Dec 2018 11:01:27 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181210.114702.127499839186553253.davem@davemloft.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 11 Dec 2018 03:01:41 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2018/12/11 上午3:47, David Miller wrote: > 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. It seems the reason is that I cast from plain void pointer directly. Let me cast it to uintptr_t first. Thanks >