From patchwork Wed Apr 3 16:04:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Yang X-Patchwork-Id: 10884097 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 4FA121390 for ; Wed, 3 Apr 2019 16:03:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 336C52228E for ; Wed, 3 Apr 2019 16:03:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 24863287C8; Wed, 3 Apr 2019 16:03:59 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B36D02228E for ; Wed, 3 Apr 2019 16:03:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=Cu4wzMBJUcQWtOCYK8UmIX5tVqxC0Wh/VV/RNgJDYbk=; b=Tk3Hnf8OhdId6BT06LMD+6Piy7 wqStLlP6UpqGLfniXHNf/hNMjcKRaIs12ksgDGBkPSi0SEOyM+v97UyXJp9qvv6HJbkwEsMNTq9QL Qr7JDkPhX84Ykd+5xwKqiPcbWq9+GPAJkR3F6g5E+RhOroV0qv2Rbkf6mJTD8pM/+OS7BxaHoqRI0 ES4xSVOCSWe/MwcVp2ceuylrmS9EdJzp4G53Tu89ZLJ1NlOE1sXovLjTBlUOG0k7gNrJaFLnjmile vzNRXFzrSWOEYBcq/7CEBjKuTy1iHZsncGU82CP4N8lfpjXKJK7+ZRVqA7BE4v2KQZVrp7QpPZPgC 8piJ3Ytg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hBiMh-0000nK-IV; Wed, 03 Apr 2019 16:03:51 +0000 Received: from mxhk.zte.com.cn ([63.217.80.70]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hBiMa-0000jy-21; Wed, 03 Apr 2019 16:03:46 +0000 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id EFA5F44140102BC22BA4; Thu, 4 Apr 2019 00:03:36 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id x33G3RBn028448; Thu, 4 Apr 2019 00:03:27 +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 2019040400035368-7533729 ; Thu, 4 Apr 2019 00:03:53 +0800 From: Wen Yang To: linux-kernel@vger.kernel.org Subject: [PATCH 1/7] drm/mediatek: fix possible object reference leak Date: Thu, 4 Apr 2019 00:04:09 +0800 Message-Id: <1554307455-40361-2-git-send-email-wen.yang99@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1554307455-40361-1-git-send-email-wen.yang99@zte.com.cn> References: <1554307455-40361-1-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 2019-04-04 00:03:53, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2019-04-04 00:03:19, Serialize complete at 2019-04-04 00:03:19 X-MAIL: mse01.zte.com.cn x33G3RBn028448 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190403_090344_334332_663B3815 X-CRM114-Status: GOOD ( 12.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wang.yi59@zte.com.cn, Philipp Zabel , David Airlie , dri-devel@lists.freedesktop.org, Matthias Brugger , linux-mediatek@lists.infradead.org, Daniel Vetter , CK Hu , Wen Yang , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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. Detected by coccinelle with the following warnings: drivers/gpu/drm/mediatek/mtk_hdmi.c:1521:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function. drivers/gpu/drm/mediatek/mtk_hdmi.c:1524:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function. Signed-off-by: Wen Yang Cc: CK Hu Cc: Philipp Zabel Cc: David Airlie Cc: Daniel Vetter Cc: Matthias Brugger Cc: dri-devel@lists.freedesktop.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- drivers/gpu/drm/mediatek/mtk_hdmi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c index 915cc84..ed10f4d 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -1516,6 +1516,7 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, of_node_put(remote); hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np); + of_node_put(i2c_np); if (!hdmi->ddc_adpt) { dev_err(dev, "Failed to get ddc i2c adapter by node\n"); return -EINVAL;