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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 AC392C46464 for ; Mon, 13 Aug 2018 12:55:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D53E2175C for ; Mon, 13 Aug 2018 12:55:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6D53E2175C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729900AbeHMPhX (ORCPT ); Mon, 13 Aug 2018 11:37:23 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:37478 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729785AbeHMPhX (ORCPT ); Mon, 13 Aug 2018 11:37:23 -0400 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id E1383FAD6415B; Mon, 13 Aug 2018 20:55:07 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.399.0; Mon, 13 Aug 2018 20:55:08 +0800 From: zhong jiang To: , , CC: Subject: [PATCH v2] scsi: Use vmemdup_user to replace the open code Date: Mon, 13 Aug 2018 20:43:20 +0800 Message-ID: <1534164200-28408-1-git-send-email-zhongjiang@huawei.com> X-Mailer: git-send-email 1.7.12.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org vmemdup_user is better than duplicating its implementation, So just replace the open code. The issue is detected with the help of Coccinelle. Signed-off-by: zhong jiang --- drivers/scsi/hpsa.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 58bb70b..666ba09e5 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -6381,13 +6381,9 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp) return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; - ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); - if (!ioc) { - status = -ENOMEM; - goto cleanup1; - } - if (copy_from_user(ioc, argp, sizeof(*ioc))) { - status = -EFAULT; + ioc = vmemdup_user(argp, sizeof(*ioc)); + if (IS_ERR(ioc)) { + status = PTR_ERR(ioc); goto cleanup1; } if ((ioc->buf_size < 1) && @@ -6505,7 +6501,7 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp) kfree(buff); } kfree(buff_size); - kfree(ioc); + kvfree(ioc); return status; } -- 1.7.12.4