From patchwork Wed Apr 17 02:43:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Yang X-Patchwork-Id: 10904383 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3D00613B5 for ; Wed, 17 Apr 2019 02:42:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A04C289F8 for ; Wed, 17 Apr 2019 02:42:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C008287E9; Wed, 17 Apr 2019 02:42:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B903A287E9 for ; Wed, 17 Apr 2019 02:42:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731094AbfDQCm3 (ORCPT ); Tue, 16 Apr 2019 22:42:29 -0400 Received: from out1.zte.com.cn ([202.103.147.172]:54986 "EHLO mxct.zte.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728032AbfDQCm3 (ORCPT ); Tue, 16 Apr 2019 22:42:29 -0400 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id B6835BA9BFF2DA252E23; Wed, 17 Apr 2019 10:42:27 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id x3H2gKi3060602; Wed, 17 Apr 2019 10:42:20 +0800 (GMT-8) (envelope-from wen.yang99@zte.com.cn) Received: from fox-host8.localdomain ([10.74.120.8]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2019041710424087-8909752 ; Wed, 17 Apr 2019 10:42:40 +0800 From: Wen Yang To: linux-kernel@vger.kernel.org Cc: wang.yi59@zte.com.cn, Wen Yang , Sebastian Reichel , linux-pm@vger.kernel.org Subject: [PATCH 1/2] power: supply: fix leaked of_node refs in ab8500_bm_of_probe Date: Wed, 17 Apr 2019 10:43:02 +0800 Message-Id: <1555468983-34952-2-git-send-email-wen.yang99@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1555468983-34952-1-git-send-email-wen.yang99@zte.com.cn> References: <1555468983-34952-1-git-send-email-wen.yang99@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2019-04-17 10:42:40, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2019-04-17 10:42:13, Serialize complete at 2019-04-17 10:42:13 X-MAIL: mse01.zte.com.cn x3H2gKi3060602 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The call to of_parse_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. 492 int ab8500_bm_of_probe(struct device *dev, 493 struct device_node *np, 494 struct abx500_bm_data *bm) 495 { 496 const struct batres_vs_temp *tmp_batres_tbl; 497 struct device_node *battery_node; ... 501 /* get phandle to 'battery-info' node */ 502 battery_node = of_parse_phandle(np, "battery", 0); ... 509 if (!btech) { 510 dev_warn(dev, "missing property battery-name/type\n"); 511 return -EINVAL; ---> leaked here 512 } ... 540 of_node_put(battery_node); ---> released here 541 542 return 0; 543 } Detected by coccinelle with the following warnings: ./drivers/power/supply/ab8500_bmdata.c:511:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 502, but without a corresponding object release within this function. Signed-off-by: Wen Yang Cc: Sebastian Reichel Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/power/supply/ab8500_bmdata.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/power/supply/ab8500_bmdata.c b/drivers/power/supply/ab8500_bmdata.c index 7b2b699..f6a6697 100644 --- a/drivers/power/supply/ab8500_bmdata.c +++ b/drivers/power/supply/ab8500_bmdata.c @@ -508,6 +508,7 @@ int ab8500_bm_of_probe(struct device *dev, btech = of_get_property(battery_node, "stericsson,battery-type", NULL); if (!btech) { dev_warn(dev, "missing property battery-name/type\n"); + of_node_put(battery_node); return -EINVAL; }