From patchwork Thu Dec 16 10:14:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 524878 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30690C433F5 for ; Thu, 16 Dec 2021 10:15:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235856AbhLPKPQ (ORCPT ); Thu, 16 Dec 2021 05:15:16 -0500 Received: from smtp23.cstnet.cn ([159.226.251.23]:39630 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235826AbhLPKPN (ORCPT ); Thu, 16 Dec 2021 05:15:13 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-03 (Coremail) with SMTP id rQCowAAXHFiaEbthhP5AAw--.30417S2; Thu, 16 Dec 2021 18:14:50 +0800 (CST) From: Jiasheng Jiang To: skashyap@marvell.com, jhasan@marvell.com, GR-QLogic-Storage-Upstream@marvell.com, jejb@linux.ibm.com, martin.petersen@oracle.com, linux@armlinux.org.uk Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] scsi: qedf: potential dereference of null pointer Date: Thu, 16 Dec 2021 18:14:49 +0800 Message-Id: <20211216101449.375953-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: rQCowAAXHFiaEbthhP5AAw--.30417S2 X-Coremail-Antispam: 1UD129KBjvdXoWrKryrXF4xWw4Uur13Zr43Wrg_yoWfuFX_WF WvgrW3A347Gw1Skw15t34xAry093yrZr18ursa9r4Fya48Jwn3Jayvqw13Xr4DC3yDZFs8 JFyDGr10y3WUXjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb38FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628v n2kIc2xKxwCY02Avz4vE14v_Gw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr 0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY 17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcV C0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWrJr0_WFyUJwCI 42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWI evJa73UjIFyTuYvjfUonmRUUUUU X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The return value of dma_alloc_coherent() needs to be checked. To avoid use of null pointer in case of the failure of alloc. Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.") Signed-off-by: Jiasheng Jiang Acked-by: Saurav Kashyap --- drivers/scsi/qedf/qedf_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c index b92570a7c309..309e205a8e70 100644 --- a/drivers/scsi/qedf/qedf_main.c +++ b/drivers/scsi/qedf/qedf_main.c @@ -1415,6 +1415,8 @@ static void qedf_upload_connection(struct qedf_ctx *qedf, */ term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, &term_params_dma, GFP_KERNEL); + if (!term_params) + return; QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection " "port_id=%06x.\n", fcport->rdata->ids.port_id);