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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88D54C38159 for ; Tue, 23 Aug 2022 10:17:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353879AbiHWKQJ (ORCPT ); Tue, 23 Aug 2022 06:16:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352938AbiHWKGa (ORCPT ); Tue, 23 Aug 2022 06:06:30 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB91511177; Tue, 23 Aug 2022 01:53:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 54D4CB81C28; Tue, 23 Aug 2022 08:53:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B9C9C433D6; Tue, 23 Aug 2022 08:53:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1661244818; bh=a/tR0wRoyr4JuYKwTcIB1bxG4Gavs+wVKA4M6lxPakE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hAez04SDu9ICXZugcXse63g5lwsda5/ZKDRtMqOhmZvfRnwn52efAu1Wzc7MsFcpi BqVdKWj94STythVjZc+017i8jJAxUypIJiUHilfcirRE8yRYkXMaq/lBnG+atkrrQc cZy9067jGMqJFP/pbBAlSgsb3APbi2jlFuDuf+1g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Liang He , Martin Blumenstingl , Neil Armstrong , Sasha Levin Subject: [PATCH 5.15 157/244] drm/meson: Fix refcount bugs in meson_vpu_has_available_connectors() Date: Tue, 23 Aug 2022 10:25:16 +0200 Message-Id: <20220823080104.437021684@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220823080059.091088642@linuxfoundation.org> References: <20220823080059.091088642@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Liang He [ Upstream commit 91b3c8dbe898df158fd2a84675f3a284ff6666f7 ] In this function, there are two refcount leak bugs: (1) when breaking out of for_each_endpoint_of_node(), we need call the of_node_put() for the 'ep'; (2) we should call of_node_put() for the reference returned by of_graph_get_remote_port() when it is not used anymore. Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller") Signed-off-by: Liang He Acked-by: Martin Blumenstingl Acked-by: Neil Armstrong Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20220726010722.1319416-1-windhl@126.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/meson/meson_drv.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index c98525d60df5..a56607501d36 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -114,8 +114,11 @@ static bool meson_vpu_has_available_connectors(struct device *dev) for_each_endpoint_of_node(dev->of_node, ep) { /* If the endpoint node exists, consider it enabled */ remote = of_graph_get_remote_port(ep); - if (remote) + if (remote) { + of_node_put(remote); + of_node_put(ep); return true; + } } return false; -- 2.35.1