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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 EEA25C2D0DB for ; Fri, 24 Jan 2020 11:24:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C2C8B2075D for ; Fri, 24 Jan 2020 11:24:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579865083; bh=/uFn5WmS2Rcrpg5Cad3o1dLefQ/cMWBBikWfx9CbPds=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2npAVWHILywhtj5ddaNbXZxq8vAb14FmmuZwhWvg9Qm8tL6X51qS0t26eriQphPlP PVLIvbcGeM3d7dagmR593UFKyi20dGIOtUXzMMEpmGCtMQrG4UeZ7NmS5pjYsvP3Ji BABOj5auE685SlgEU3AU9QkLixOUDP7LC8lEO3GI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403805AbgAXLYm (ORCPT ); Fri, 24 Jan 2020 06:24:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:38254 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391085AbgAXLYj (ORCPT ); Fri, 24 Jan 2020 06:24:39 -0500 Received: from localhost (ip-213-127-102-57.ip.prioritytelecom.net [213.127.102.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B2EFA20838; Fri, 24 Jan 2020 11:24:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579865079; bh=/uFn5WmS2Rcrpg5Cad3o1dLefQ/cMWBBikWfx9CbPds=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VD4zrijSxMXn8jPgV3tn3rkeEmK2sTo/KiAIT8mEACOwKsZzk8y5fW2IMU2/ZTSUt 2knpt7LC7kxX69LAeJ0fwmboObInEz+BFh+0YX9XhK+sz3v77iArTtFovfk5sLzXpF WG11gy5A38gULYeIROR7i9pvonkBrDwFkaV5W0WE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jeffrey Hugo , Bjorn Andersson , Rob Clark , Sasha Levin Subject: [PATCH 4.19 434/639] drm/msm/mdp5: Fix mdp5_cfg_init error return Date: Fri, 24 Jan 2020 10:30:04 +0100 Message-Id: <20200124093141.386075416@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200124093047.008739095@linuxfoundation.org> References: <20200124093047.008739095@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jeffrey Hugo [ Upstream commit fc19cbb785d7bbd1a1af26229b5240a3ab332744 ] If mdp5_cfg_init fails because of an unknown major version, a null pointer dereference occurs. This is because the caller of init expects error pointers, but init returns NULL on error. Fix this by returning the expected values on error. Fixes: 2e362e1772b8 (drm/msm/mdp5: introduce mdp5_cfg module) Signed-off-by: Jeffrey Hugo Reviewed-by: Bjorn Andersson Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c index 824067d2d4277..42f0ecb0cf35f 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c @@ -635,7 +635,7 @@ fail: if (cfg_handler) mdp5_cfg_destroy(cfg_handler); - return NULL; + return ERR_PTR(ret); } static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev) -- 2.20.1