From patchwork Mon Sep 13 13:12:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 510648 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 22DFCC433EF for ; Mon, 13 Sep 2021 14:02:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0CF6560FA0 for ; Mon, 13 Sep 2021 14:02:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245391AbhIMOEC (ORCPT ); Mon, 13 Sep 2021 10:04:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:50992 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245612AbhIMOBh (ORCPT ); Mon, 13 Sep 2021 10:01:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7269761A0C; Mon, 13 Sep 2021 13:38:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631540288; bh=lVDVoa1sP9R2MLoIob+fd5qtkGB87avFrZ2575JGRtQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D3eGh7BnCFctQ3Xmt913TXl33rsWjPmeVGuzAcurFxcvcmiZ2Uk0sN0NgUoo16wJo Nlkg4+PW9JlUdL7z9R7Hy/bQVINlMJ0C3986zLJ9oFD+/lPrQdVPPYsZzYTXsjOESi yqVn05S2Z3B2wlmld0rZAS5kn+cuWY/eUo8FYgak= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julia Lawall , Daniel Vetter , Sasha Levin Subject: [PATCH 5.13 089/300] drm/of: free the right object Date: Mon, 13 Sep 2021 15:12:30 +0200 Message-Id: <20210913131112.388603657@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210913131109.253835823@linuxfoundation.org> References: <20210913131109.253835823@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Julia Lawall [ Upstream commit b557a5f8da5798d27370ed6b73e673aae33efd55 ] There is no need to free a NULL value. Instead, free the object that is leaking due to the iterator. The semantic patch that finds this problem is as follows: // @@ expression x,e; identifier f; @@ x = f(...); if (x == NULL) { ... when any when != x = e * of_node_put(x); ... } // Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order") Signed-off-by: Julia Lawall Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210709200717.3676376-1-Julia.Lawall@inria.fr Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index ca04c34e8251..197c57477344 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -315,7 +315,7 @@ static int drm_of_lvds_get_remote_pixels_type( remote_port = of_graph_get_remote_port(endpoint); if (!remote_port) { - of_node_put(remote_port); + of_node_put(endpoint); return -EPIPE; }