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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 DFC1BC2BB86 for ; Sat, 11 Apr 2020 23:14:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA12C215A4 for ; Sat, 11 Apr 2020 23:14:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646841; bh=TzM/SWg7N0SF+1EpVQxkbMiR46P25mK/oHaGpAH0d2Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Ltl4uLcCNRRPqYm5JkBMDHTxdkeCj9JKI+YLhUGCXSEKvaDcH3VGGz7BUssaRgnPf fU0TgYJIvkyfxT+ntZSUsLK9u97lIA2xPDkAt7M4qBgSK4pp3bprZ4nj4T+MjcuWOA 7vavpHksX1e42ySt5PBAB+pwDkAlw4r3M0Threvk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730232AbgDKXN7 (ORCPT ); Sat, 11 Apr 2020 19:13:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:55222 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728797AbgDKXNw (ORCPT ); Sat, 11 Apr 2020 19:13:52 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4BAD720787; Sat, 11 Apr 2020 23:13:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646832; bh=TzM/SWg7N0SF+1EpVQxkbMiR46P25mK/oHaGpAH0d2Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AZtKsjE1evxOUmTHTMz62TOp3iGeEPSQk+SHzGjh9s5kqkIUbeNbSsYh7obQGMdwx Tq9NZyXRYAmhqr5QcwdWfw1nJ6eDGbxR/BZGXCNo711n1gW26CQR8XzMSdlI6SiFhp 88/v/oiPUZSMWMo1iMAL+k6B0JMX1Fv0TLe5aHRE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wen Yang , Laurent Pinchart , Mukesh Ojha , Tomi Valkeinen , David Airlie , Daniel Vetter , Sebastian Reichel , dri-devel@lists.freedesktop.org, Markus Elfring , Sasha Levin Subject: [PATCH AUTOSEL 4.14 21/37] drm/omap: fix possible object reference leak Date: Sat, 11 Apr 2020 19:13:10 -0400 Message-Id: <20200411231327.26550-21-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200411231327.26550-1-sashal@kernel.org> References: <20200411231327.26550-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wen Yang [ Upstream commit 47340e46f34a3b1d80e40b43ae3d7a8da34a3541 ] The call to of_find_matching_node 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/omapdrm/dss/omapdss-boot-init.c:212:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 209, but without a corresponding object release within this function. drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c:237:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 209, but without a corresponding object release within this function. Signed-off-by: Wen Yang Reviewed-by: Laurent Pinchart Reviewed-by: Mukesh Ojha Cc: Tomi Valkeinen Cc: David Airlie Cc: Daniel Vetter Cc: Sebastian Reichel Cc: Laurent Pinchart Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Cc: Markus Elfring Signed-off-by: Tomi Valkeinen Link: https://patchwork.freedesktop.org/patch/msgid/1554692313-28882-2-git-send-email-wen.yang99@zte.com.cn Signed-off-by: Sasha Levin --- drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c index bf626acae2712..cd8e9b799b9a5 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c +++ b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c @@ -193,7 +193,7 @@ static int __init omapdss_boot_init(void) dss = of_find_matching_node(NULL, omapdss_of_match); if (dss == NULL || !of_device_is_available(dss)) - return 0; + goto put_node; omapdss_walk_device(dss, true); @@ -218,6 +218,8 @@ static int __init omapdss_boot_init(void) kfree(n); } +put_node: + of_node_put(dss); return 0; } -- 2.20.1