From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751815AbeEQK6n (ORCPT ); Thu, 17 May 2018 06:58:43 -0400 Received: from gateway36.websitewelcome.com ([192.185.185.36]:33659 "EHLO gateway36.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751274AbeEQK6m (ORCPT ); Thu, 17 May 2018 06:58:42 -0400 X-Authority-Reason: nr=8 Subject: Re: [PATCH 01/11] media: tm6000: fix potential Spectre variant 1 From: "Gustavo A. R. Silva" To: Dan Carpenter Cc: Mauro Carvalho Chehab , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org References: <3d4973141e218fb516422d3d831742d55aaa5c04.1524499368.git.gustavo@embeddedor.com> <20180423152455.363d285c@vento.lan> <3ab9c4c9-0656-a08e-740e-394e2e509ae9@embeddedor.com> <20180423161742.66f939ba@vento.lan> <99e158c0-1273-2500-da9e-b5ab31cba889@embeddedor.com> <20180426204241.03a42996@vento.lan> <20180515085953.65bfa107@vento.lan> <20180515141655.idzuh2jfdkuu5grs@mwanda> <20180515193936.m25kzyeknsk2bo2c@mwanda> <0f31a60b-911d-0140-3546-98317e2a0557@embeddedor.com> Message-ID: Date: Thu, 17 May 2018 05:36:03 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <0f31a60b-911d-0140-3546-98317e2a0557@embeddedor.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 187.172.56.86 X-Source-L: No X-Exim-ID: 1fJGGU-001Uzd-1Z X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: ([192.168.1.70]) [187.172.56.86]:37950 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 5 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/16/2018 08:14 PM, Gustavo A. R. Silva wrote: > > > On 05/15/2018 02:39 PM, Dan Carpenter wrote: >>> Dan, >>> >>> These are all the Spectre media issues I see smatch is reporting in >>> linux-next-20180515: >>> >>> drivers/media/cec/cec-pin-error-inj.c:170 cec_pin_error_inj_parse_line() >>> warn: potential spectre issue 'pin->error_inj_args' >>> drivers/media/dvb-core/dvb_ca_en50221.c:1479 >>> dvb_ca_en50221_io_write() warn: >>> potential spectre issue 'ca->slot_info' (local cap) >>> drivers/media/dvb-core/dvb_net.c:252 handle_one_ule_extension() warn: >>> potential spectre issue 'p->ule_next_hdr' >>> >>> I pulled the latest changes from the smatch repository and compiled it. >>> >>> I'm running smatch v0.5.0-4459-g2f66d40 now. Is this the latest version? >>> >>> I wonder if there is anything I might be missing. >>> >> >> You'd need to rebuild the db (possibly twice but definitely once). >> > > Hi Dan, > > After rebuilding the db (once), these are all the Spectre media warnings > I get: > > drivers/media/pci/ddbridge/ddbridge-core.c:233 ddb_redirect() warn: > potential spectre issue 'ddbs' > drivers/media/pci/ddbridge/ddbridge-core.c:243 ddb_redirect() warn: > potential spectre issue 'pdev->port' > drivers/media/pci/ddbridge/ddbridge-core.c:252 ddb_redirect() warn: > potential spectre issue 'idev->input' > drivers/media/dvb-core/dvb_ca_en50221.c:1400 > dvb_ca_en50221_io_do_ioctl() warn: potential spectre issue > 'ca->slot_info' (local cap) > drivers/media/dvb-core/dvb_ca_en50221.c:1479 dvb_ca_en50221_io_write() > warn: potential spectre issue 'ca->slot_info' (local cap) > drivers/media/dvb-core/dvb_net.c:252 handle_one_ule_extension() warn: > potential spectre issue 'p->ule_next_hdr' > drivers/media/dvb-core/dvb_net.c:1483 dvb_net_do_ioctl() warn: potential > spectre issue 'dvbnet->device' (local cap) > drivers/media/cec/cec-pin-error-inj.c:170 cec_pin_error_inj_parse_line() > warn: potential spectre issue 'pin->error_inj_args' > > I just want to double check if you are getting the same output. In case > you are getting the same, then what Mauro commented about these issues: > > https://patchwork.linuxtv.org/project/linux-media/list/?submitter=7277 > > being resolved by commit 3ad3b7a2ebaefae37a7eafed0779324987ca5e56 seems > to be correct. > Interesting, I've rebuild the db twice and now I get a total of 75 Spectre warnings in drivers/media -- Gustavo