From patchwork Thu Apr 15 16:42:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Don Brace X-Patchwork-Id: 12205765 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 84F15C433ED for ; Thu, 15 Apr 2021 16:42:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 644D261131 for ; Thu, 15 Apr 2021 16:42:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232752AbhDOQmf (ORCPT ); Thu, 15 Apr 2021 12:42:35 -0400 Received: from esa.microchip.iphmx.com ([68.232.153.233]:35185 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232648AbhDOQme (ORCPT ); Thu, 15 Apr 2021 12:42:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1618504931; x=1650040931; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GTfYrhKWL41NMQiEJF1rW9zEeEgg35gHt7dayYoGId0=; b=uXZLZvXqAUiPIK/k6SumBlWczwVEhHy9D0fFhOZcaNJbp0WNNUukhlCf pru/WRi5GX43eaLxpH80gBy4N9K6tqlgWRtSGgRQrAs5BI5gCboavsC1o 9CF0cEaF0xkWD6ST6mWQkdg+ZMt8oqya41KUxoyb/N6nyMEMfIjO4G28h cI9B2qP027TFtI1MGsrdrYbEq9eZaiFIUddiAlcy/YFmIDP8DyONXTp7r xUCxQhkehWKqRitSqLzJepwu4L7TPTxyZ+55lLATEa/nmq5+61GMW84bw hckecyuPx8ylDBpFARzlvEK+z37V9RTUYVHiANGLtP0q6HF0vKcPjxLse g==; IronPort-SDR: Cj1PA4e/1Ruzw8sqyKiTJQ9lxBbBCK/1hrPVY8TMsiJaKCGONchWK6a20AHXOfjUiz4n7tpBj3 Uvm2DibrYVp5/XCP54HDdDAk9sCjvOvhHM8tACM6B3FLJxtxXTFXilP88ukotfzSP5TAOjJlP1 AX6GA3g5M86ZzsuWz9fImlyIg2kOeZ6G3Kiwf6zKJt/kA2tGqHia83pqHehVBQnEvAKIfxc6pA fltI13JfZsl81vc8Tae+/8fSNehmbIslSbWua5UdxhogsygoZhjtylQXuT0+BTglRmqbnY01YP QAE= X-IronPort-AV: E=Sophos;i="5.82,225,1613458800"; d="scan'208";a="117169999" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Apr 2021 09:42:11 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 15 Apr 2021 09:42:10 -0700 Received: from [127.0.1.1] (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2176.2 via Frontend Transport; Thu, 15 Apr 2021 09:42:10 -0700 Subject: [PATCH 2/2] smartpqi: fix device pointer variable reference static checker issue From: Don Brace To: , , , , , , , , , , , CC: Date: Thu, 15 Apr 2021 11:42:10 -0500 Message-ID: <161850493026.7302.10032784239320437353.stgit@brunhilda> In-Reply-To: <161850488487.7302.7018870513204678832.stgit@brunhilda> References: <161850488487.7302.7018870513204678832.stgit@brunhilda> User-Agent: StGit/0.23-dirty MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Dan Carpenter found a possible NULL pointer dereference issue in function pqi_sas_port_add_rphy. Link: ("https://www.mail-archive.com/kbuild@lists.01.org/msg06329.html") Fixes: ec504b23df9d ("[304/324] scsi: smartpqi: Add phy ID support for the physical drives") drivers/scsi/smartpqi/smartpqi_sas_transport.c:97 pqi_sas_port_add_rphy() warn: variable dereferenced before check 'pqi_sas_port->device' (see line 95) Correct issue by moving reference of pqi_sas_port->device after the check for the device pointer being non-NULL. Reported-by: Dan Carpenter Reported-by: kernel test robot Reviewed-by: Scott Benesh Reviewed-by: Scott Teel Reviewed-by: Mike McGowen Reviewed-by: Kevin Barnett Signed-off-by: Don Brace --- drivers/scsi/smartpqi/smartpqi_sas_transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/smartpqi/smartpqi_sas_transport.c b/drivers/scsi/smartpqi/smartpqi_sas_transport.c index dd9b784792ef..dd628cc87f78 100644 --- a/drivers/scsi/smartpqi/smartpqi_sas_transport.c +++ b/drivers/scsi/smartpqi/smartpqi_sas_transport.c @@ -92,12 +92,12 @@ static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port, identify = &rphy->identify; identify->sas_address = pqi_sas_port->sas_address; - identify->phy_identifier = pqi_sas_port->device->phy_id; identify->initiator_port_protocols = SAS_PROTOCOL_ALL; identify->target_port_protocols = SAS_PROTOCOL_STP; if (pqi_sas_port->device) { + identify->phy_identifier = pqi_sas_port->device->phy_id; switch (pqi_sas_port->device->device_type) { case SA_DEVICE_TYPE_SAS: case SA_DEVICE_TYPE_SES: