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=-16.1 required=3.0 tests=BAYES_00,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 6D313C43464 for ; Fri, 18 Sep 2020 02:21:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38BF023119 for ; Fri, 18 Sep 2020 02:21:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600395718; bh=5LskZOh2pD9zg+8IVR0T9t1IBdkFEYbOnCrQ+2yn3kE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EPIWsHN/ldes/uezVf3cJXKE98UCSk+gk1r7IXj/pr2NJOZw4qavCybGKj6bFuDQ5 WdPCeXAuUE1lasgEX7jsEU9j6AFqJgNf/+ZEIwMBFB0WGfP+hNFBxT9osW9C6FXMgh 5U6Cln/I2ZQ5laOtp9/Pijx6wqLCmMSNrvwTuxjQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729569AbgIRCV4 (ORCPT ); Thu, 17 Sep 2020 22:21:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:48000 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727584AbgIRCRY (ORCPT ); Thu, 17 Sep 2020 22:17:24 -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 8586623718; Fri, 18 Sep 2020 02:17:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600395437; bh=5LskZOh2pD9zg+8IVR0T9t1IBdkFEYbOnCrQ+2yn3kE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=geZQFJA9lMxyDGerl1L/lE9xwjuYqOy010jrJ7q8t3luSkYPhpVlQlkoK7DAzFbvk RSVBOUdbWc2WEJPJZfxnsZ5LvV5KggXW6Yn7Ijt0SivDFFdcPVkPmbnuwUsKzpvfSi z4NMu3lXJ6oDBDaeXCZf+oHpdOxsX3rWDSHV7twU= 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 , linux-omap@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 27/64] drm/omap: fix possible object reference leak Date: Thu, 17 Sep 2020 22:16:06 -0400 Message-Id: <20200918021643.2067895-27-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200918021643.2067895-1-sashal@kernel.org> References: <20200918021643.2067895-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit 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/video/fbdev/omap2/dss/omapdss-boot-init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c b/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c index 8b6f6d5fdd68b..43186fa8a13c9 100644 --- a/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c +++ b/drivers/video/fbdev/omap2/dss/omapdss-boot-init.c @@ -194,7 +194,7 @@ 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); @@ -221,6 +221,8 @@ static int __init omapdss_boot_init(void) kfree(n); } +put_node: + of_node_put(dss); return 0; } -- 2.25.1