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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 A846BC0651F for ; Thu, 4 Jul 2019 14:06:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8AA992085A for ; Thu, 4 Jul 2019 14:06:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727599AbfGDOGk (ORCPT ); Thu, 4 Jul 2019 10:06:40 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:8705 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727494AbfGDOGg (ORCPT ); Thu, 4 Jul 2019 10:06:36 -0400 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 0FC7B1EBFB885B41CCCE; Thu, 4 Jul 2019 22:06:27 +0800 (CST) Received: from localhost.localdomain (10.67.212.132) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.439.0; Thu, 4 Jul 2019 22:06:17 +0800 From: Huazhong Tan To: CC: , , , , , Weihang Li , Peng Li , Huazhong Tan Subject: [PATCH net-next 6/9] net: hns3: check msg_data before memcpy in hclgevf_send_mbx_msg Date: Thu, 4 Jul 2019 22:04:25 +0800 Message-ID: <1562249068-40176-7-git-send-email-tanhuazhong@huawei.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1562249068-40176-1-git-send-email-tanhuazhong@huawei.com> References: <1562249068-40176-1-git-send-email-tanhuazhong@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.132] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Weihang Li The value of msg_data may be NULL in some cases, which will cause errors reported by some compiler. So this patch adds a check to fix it. Signed-off-by: Weihang Li Signed-off-by: Peng Li Signed-off-by: Huazhong Tan --- drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c index 30f2e93..f60b80b 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c @@ -102,7 +102,8 @@ int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev, u16 code, u16 subcode, ~HCLGE_MBX_NEED_RESP_BIT; req->msg[0] = code; req->msg[1] = subcode; - memcpy(&req->msg[2], msg_data, msg_len); + if (msg_data) + memcpy(&req->msg[2], msg_data, msg_len); /* synchronous send */ if (need_resp) { -- 2.7.4