From patchwork Thu Nov 16 08:04:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Rybchenko X-Patchwork-Id: 31441 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C76691B64D; Thu, 16 Nov 2017 09:06:00 +0100 (CET) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id 4B43F1B27E; Thu, 16 Nov 2017 09:05:06 +0100 (CET) Received: from pure.maildistiller.com (unknown [10.110.50.29]) by dispatch1-us1.ppe-hosted.com (Proofpoint Essentials ESMTP Server) with ESMTP id 03A3820066; Thu, 16 Nov 2017 08:05:06 +0000 (UTC) X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.110.49.251]) by pure.maildistiller.com (Proofpoint Essentials ESMTP Server) with ESMTPS id A9AD510004F; Thu, 16 Nov 2017 08:05:05 +0000 (UTC) Received: from webmail.solarflare.com (webmail.solarflare.com [12.187.104.26]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1-us1.ppe-hosted.com (Proofpoint Essentials ESMTP Server) with ESMTPS id 7E8F9400059; Thu, 16 Nov 2017 08:05:05 +0000 (UTC) Received: from ocex03.SolarFlarecom.com (10.20.40.36) by ocex03.SolarFlarecom.com (10.20.40.36) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Thu, 16 Nov 2017 00:04:56 -0800 Received: from opal.uk.solarflarecom.com (10.17.10.1) by ocex03.SolarFlarecom.com (10.20.40.36) with Microsoft SMTP Server (TLS) id 15.0.1044.25 via Frontend Transport; Thu, 16 Nov 2017 00:04:56 -0800 Received: from uklogin.uk.solarflarecom.com (uklogin.uk.solarflarecom.com [10.17.10.10]) by opal.uk.solarflarecom.com (8.13.8/8.13.8) with ESMTP id vAG84sfL016808; Thu, 16 Nov 2017 08:04:55 GMT Received: from uklogin.uk.solarflarecom.com (localhost.localdomain [127.0.0.1]) by uklogin.uk.solarflarecom.com (8.13.8/8.13.8) with ESMTP id vAG84quP006905; Thu, 16 Nov 2017 08:04:54 GMT From: Andrew Rybchenko To: CC: Andrew Lee , Date: Thu, 16 Nov 2017 08:04:40 +0000 Message-ID: <1510819481-6809-53-git-send-email-arybchenko@solarflare.com> X-Mailer: git-send-email 1.8.2.3 In-Reply-To: <1510819481-6809-1-git-send-email-arybchenko@solarflare.com> References: <1510819481-6809-1-git-send-email-arybchenko@solarflare.com> MIME-Version: 1.0 X-MDID: 1510819506-0CxZ1VuBz41N Subject: [dpdk-dev] [PATCH 52/53] net/sfc/base: fix PreFAST static analysis warning (C6001) X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Andrew Lee Fix warning "C6001: Using uninitialized memory '*sensor_maskp'" which could occur when the npages argument to efx_mcdi_sensor_info() is less than or equal to zero. Fixes: dfb3b1ce15f6 ("net/sfc/base: import monitors access via MCDI") Cc: stable@dpdk.org Signed-off-by: Andrew Lee Signed-off-by: Andrew Rybchenko --- drivers/net/sfc/base/mcdi_mon.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/net/sfc/base/mcdi_mon.c b/drivers/net/sfc/base/mcdi_mon.c index 8ea4216..7e4264a 100644 --- a/drivers/net/sfc/base/mcdi_mon.c +++ b/drivers/net/sfc/base/mcdi_mon.c @@ -396,6 +396,11 @@ efx_mcdi_sensor_info( EFSYS_ASSERT(sensor_maskp != NULL); + if (npages < 1) { + rc = EINVAL; + goto fail1; + } + for (page = 0; page < npages; page++) { uint32_t mask; @@ -412,7 +417,7 @@ efx_mcdi_sensor_info( if (req.emr_rc != 0) { rc = req.emr_rc; - goto fail1; + goto fail2; } mask = MCDI_OUT_DWORD(req, SENSOR_INFO_OUT_MASK); @@ -420,18 +425,20 @@ efx_mcdi_sensor_info( if ((page != (npages - 1)) && ((mask & (1U << MC_CMD_SENSOR_PAGE0_NEXT)) == 0)) { rc = EINVAL; - goto fail2; + goto fail3; } sensor_maskp[page] = mask; } if (sensor_maskp[npages - 1] & (1U << MC_CMD_SENSOR_PAGE0_NEXT)) { rc = EINVAL; - goto fail3; + goto fail4; } return (0); +fail4: + EFSYS_PROBE(fail4); fail3: EFSYS_PROBE(fail3); fail2: