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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 0CBD8C43381 for ; Tue, 19 Feb 2019 06:50:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D293C217D9 for ; Tue, 19 Feb 2019 06:50:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726428AbfBSGu4 (ORCPT ); Tue, 19 Feb 2019 01:50:56 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53380 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725730AbfBSGu4 (ORCPT ); Tue, 19 Feb 2019 01:50:56 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BE5001244F6; Tue, 19 Feb 2019 06:50:55 +0000 (UTC) Received: from [10.72.12.172] (ovpn-12-172.pek2.redhat.com [10.72.12.172]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B3E865F9D0; Tue, 19 Feb 2019 06:50:48 +0000 (UTC) Subject: Re: [PATCH net] vhost: correctly check the return value of translate_desc() in log_used() 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, stephen@networkplumber.org References: <20190215075324.18891-1-jasowang@redhat.com> <20190215.100356.251698752340585300.davem@davemloft.net> From: Jason Wang Message-ID: <43623186-8759-507f-836e-0ef633b23264@redhat.com> Date: Tue, 19 Feb 2019 14:50:46 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190215.100356.251698752340585300.davem@davemloft.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 19 Feb 2019 06:50:55 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/2/16 上午2:03, David Miller wrote: > From: Jason Wang > Date: Fri, 15 Feb 2019 15:53:24 +0800 > >> When fail, translate_desc() returns negative value, otherwise the >> number of iovs. So we should fail when the return value is negative >> instead of a blindly check against zero. >> >> Reported-by: Stephen Hemminger >> Fixes: cc5e71075947 ("vhost: log dirty page correctly") >> Signed-off-by: Jason Wang > Jason, please put the Fixes tag first. > > Thank you. Ok. Will post V2. Thanks