From patchwork Wed Oct 13 07:50:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Ziyang Xuan (William)" X-Patchwork-Id: 12555019 X-Patchwork-Delegate: kuba@kernel.org 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7AE0FC433F5 for ; Wed, 13 Oct 2021 07:51:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6357860F94 for ; Wed, 13 Oct 2021 07:51:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238740AbhJMHxe (ORCPT ); Wed, 13 Oct 2021 03:53:34 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:13733 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238736AbhJMHxb (ORCPT ); Wed, 13 Oct 2021 03:53:31 -0400 Received: from dggeml757-chm.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4HTl715TnjzWktr; Wed, 13 Oct 2021 15:49:49 +0800 (CST) Received: from localhost.localdomain (10.175.104.82) by dggeml757-chm.china.huawei.com (10.1.199.137) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.8; Wed, 13 Oct 2021 15:51:26 +0800 From: Ziyang Xuan To: CC: , , , Subject: [PATCH net 2/2] NFC: digital: fix possible memory leak in digital_in_send_sdd_req() Date: Wed, 13 Oct 2021 15:50:32 +0800 Message-ID: <56fbe3414c94916d197a1a1b3e438eaa129d5c9f.1634111083.git.william.xuanziyang@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.175.104.82] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggeml757-chm.china.huawei.com (10.1.199.137) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org 'skb' is allocated in digital_in_send_sdd_req(), but not free when digital_in_send_cmd() failed, which will cause memory leak. Fix it by freeing 'skb' if digital_in_send_cmd() return failed. Fixes: 2c66daecc409 ("NFC Digital: Add NFC-A technology support") Signed-off-by: Ziyang Xuan Reviewed-by: Krzysztof Kozlowski --- net/nfc/digital_technology.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c index 84d2345c75a3..3adf4589852a 100644 --- a/net/nfc/digital_technology.c +++ b/net/nfc/digital_technology.c @@ -465,8 +465,12 @@ static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, skb_put_u8(skb, sel_cmd); skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR); - return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, - target); + rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, + target); + if (rc) + kfree_skb(skb); + + return rc; } static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg,