From nobody Sat Feb 7 18:52:25 2026 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 2133AC433FE for ; Wed, 19 Oct 2022 09:28:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233642AbiJSJ2f (ORCPT ); Wed, 19 Oct 2022 05:28:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233487AbiJSJ0z (ORCPT ); Wed, 19 Oct 2022 05:26:55 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C89EE6F79; Wed, 19 Oct 2022 02:12:17 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 1403B6178B; Wed, 19 Oct 2022 09:10:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25715C433D6; Wed, 19 Oct 2022 09:10:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666170642; bh=/7mFFmnD5ORcDhB0aTlr6PsMjGLmulXKt1omuQvE+lQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uNnDSRxqvjLifKyXk3QzyZ1IxZmiz2WHIK96ajaO9Na6v1I7u0GiInrQqq2AaveUb 0463bJl4NERKZ5e4kxJo1v8mdSf8OhvYesnJZisz2L3H0nG6DwYi+Cvuo+dUNiD0Ay SLtSnM1v1FKHL2OGRGNeWOO7q1f/CbWJRT3KsciA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zeng Jingxiang , Robert Foss , Sasha Levin Subject: [PATCH 6.0 732/862] gpu: lontium-lt9611: Fix NULL pointer dereference in lt9611_connector_init() Date: Wed, 19 Oct 2022 10:33:39 +0200 Message-Id: <20221019083322.286124999@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221019083249.951566199@linuxfoundation.org> References: <20221019083249.951566199@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Zeng Jingxiang [ Upstream commit ef8886f321c5dab8124b9153d25afa2a71d05323 ] A NULL check for bridge->encoder shows that it may be NULL, but it already been dereferenced on all paths leading to the check. 812 if (!bridge->encoder) { Dereference the pointer bridge->encoder. 810 drm_connector_attach_encoder(<9611->connector, bridge->encoder); Signed-off-by: Zeng Jingxiang Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20220727073119.1578972-= 1-zengjx95@gmail.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/lontium-lt9611.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/brid= ge/lontium-lt9611.c index 8a60e83482a0..5fccacc159f0 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -813,13 +813,14 @@ static int lt9611_connector_init(struct drm_bridge *b= ridge, struct lt9611 *lt961 =20 drm_connector_helper_add(<9611->connector, <9611_bridge_connector_helper_funcs); - drm_connector_attach_encoder(<9611->connector, bridge->encoder); =20 if (!bridge->encoder) { DRM_ERROR("Parent encoder object not found"); return -ENODEV; } =20 + drm_connector_attach_encoder(<9611->connector, bridge->encoder); + return 0; } =20 --=20 2.35.1