From patchwork Mon Mar 29 06:07:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 411142 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=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY 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 E49B1C433DB for ; Mon, 29 Mar 2021 06:08:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B40F461945 for ; Mon, 29 Mar 2021 06:08:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229706AbhC2GID (ORCPT ); Mon, 29 Mar 2021 02:08:03 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:51038 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229441AbhC2GHf (ORCPT ); Mon, 29 Mar 2021 02:07:35 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 12T5t53r148370; Mon, 29 Mar 2021 06:07:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : mime-version : content-type; s=corp-2020-01-29; bh=mOopXmFZc3N/7ZeLtL2vh5si5JzJ5ybMrlOHvDseLQs=; b=fe0L7l0iwIWiCBIK4kdmiLZc7kTpanW0vZXP46OiuXn2lYC2j9f/wxAD0+0pCD85bVnZ 6qgy1o/lssf3+xdvrvvkwtscSpp/1gEUzGa60QUM/2LrtC9CzxI0U+OI8aoosbb4lv8u G+0nuBZadvm7VhgZkj1jAGYfMzYo+DmJNWRf8zuWA1MGeKr3E272xtEk4VSYfOnkepZM zmdeSoJmYousJFIYQeUABEzo+Iezv8XTo658VHMekLHK3w1BgRUad6p9T35KkPJPAfPM 1JS5b8fkPqJ7zmz3zuGTy33QLh73jwupvIeX11WwhpYR4M2PSJYH29NPGuzXLwsa5Gyt Eg== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2130.oracle.com with ESMTP id 37hv4r2bqk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Mar 2021 06:07:30 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 12T5tMun117009; Mon, 29 Mar 2021 06:07:28 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userp3030.oracle.com with ESMTP id 37jemv9wb1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Mar 2021 06:07:28 +0000 Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 12T67Ri9013425; Mon, 29 Mar 2021 06:07:27 GMT Received: from mwanda (/102.36.221.92) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 28 Mar 2021 23:07:26 -0700 Date: Mon, 29 Mar 2021 09:07:18 +0300 From: Dan Carpenter To: Andreas Noever , Kranthi Kuntala Cc: Michael Jamet , Mika Westerberg , Yehezkel Bernat , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Jason Gunthorpe Subject: [PATCH 1/2] thunderbolt: Fix a leak in tb_retimer_add() Message-ID: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding X-Proofpoint-IMR: 1 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9937 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 spamscore=0 suspectscore=0 adultscore=0 phishscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2103250000 definitions=main-2103290047 X-Proofpoint-ORIG-GUID: f4YMGlPH_E86zyyj2k4ZSIveVt9aJHu2 X-Proofpoint-GUID: f4YMGlPH_E86zyyj2k4ZSIveVt9aJHu2 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9937 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 phishscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 spamscore=0 suspectscore=0 clxscore=1011 bulkscore=0 lowpriorityscore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2103250000 definitions=main-2103290047 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org After the device_register() succeeds, then the correct way to clean up is to call device_unregister(). The unregister calls both device_del() and device_put(). Since this code was only device_del() it results in a memory leak. Fixes: dacb12877d92 ("thunderbolt: Add support for on-board retimers") Signed-off-by: Dan Carpenter --- This is from a new static checker warning. Not tested. With new warnings it's also possible that I have misunderstood something fundamental so review carefully etc. drivers/thunderbolt/retimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/thunderbolt/retimer.c b/drivers/thunderbolt/retimer.c index 620bcf586ee2..7a5d61604c8b 100644 --- a/drivers/thunderbolt/retimer.c +++ b/drivers/thunderbolt/retimer.c @@ -347,7 +347,7 @@ static int tb_retimer_add(struct tb_port *port, u8 index, u32 auth_status) ret = tb_retimer_nvm_add(rt); if (ret) { dev_err(&rt->dev, "failed to add NVM devices: %d\n", ret); - device_del(&rt->dev); + device_unregister(&rt->dev); return ret; }