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=-13.1 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=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 9F380C433E0 for ; Mon, 10 Aug 2020 19:20:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7559E22B47 for ; Mon, 10 Aug 2020 19:20:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597087219; bh=2V8O/8NIypxvZs/NebqPdpo3C9WCOWyFh1QBb239wzo=; h=From:To:Cc:Subject:Date:List-ID:From; b=nWCwJ25eEN+VV3Z1gnr/bXkMfKmPwGsiBTrCB1zLCQz3O3GG5FMFtgH4FswJVzE1f CdmefoZpshY24UlALj/ngKmqwaCnsuk7Fb2EUC9Sd1MlybN1yp26WPopVPMQoW5Kpu n88oPCZYCZFbTPdBssajh8TlhdlYp1kjhjTVVImA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729899AbgHJTN4 (ORCPT ); Mon, 10 Aug 2020 15:13:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:45134 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728318AbgHJTNr (ORCPT ); Mon, 10 Aug 2020 15:13:47 -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 40BF4207FF; Mon, 10 Aug 2020 19:13:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597086827; bh=2V8O/8NIypxvZs/NebqPdpo3C9WCOWyFh1QBb239wzo=; h=From:To:Cc:Subject:Date:From; b=obZDsGWIBsx3/SIR7TA3etrWWpfQs91cNl9urPtTEeJSVcNbJfw4K1kht8ir4AI6x mc+c/ftA/L+M8+3XnuY/7zTy7dC7ybcLQXNerRu2TzrcOL8qW9hyAxglyRTgI/ExAG LYj33Ifb/aKsBB/+J3LirmVQogRHKshjPmhKtn2g= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tomi Valkeinen , Jyri Sarha , Sam Ravnborg , Sasha Levin , dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.14 01/22] drm/tilcdc: fix leak & null ref in panel_connector_get_modes Date: Mon, 10 Aug 2020 15:13:23 -0400 Message-Id: <20200810191345.3795166-1-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tomi Valkeinen [ Upstream commit 3f9c1c872cc97875ddc8d63bc9fe6ee13652b933 ] If videomode_from_timings() returns true, the mode allocated with drm_mode_create will be leaked. Also, the return value of drm_mode_create() is never checked, and thus could cause NULL deref. Fix these two issues. Signed-off-by: Tomi Valkeinen Link: https://patchwork.freedesktop.org/patch/msgid/20200429104234.18910-1-tomi.valkeinen@ti.com Reviewed-by: Jyri Sarha Acked-by: Sam Ravnborg Signed-off-by: Sasha Levin --- drivers/gpu/drm/tilcdc/tilcdc_panel.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c index 1813a3623ce60..0484b2cf0e2b5 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c @@ -152,12 +152,16 @@ static int panel_connector_get_modes(struct drm_connector *connector) int i; for (i = 0; i < timings->num_timings; i++) { - struct drm_display_mode *mode = drm_mode_create(dev); + struct drm_display_mode *mode; struct videomode vm; if (videomode_from_timings(timings, &vm, i)) break; + mode = drm_mode_create(dev); + if (!mode) + break; + drm_display_mode_from_videomode(&vm, mode); mode->type = DRM_MODE_TYPE_DRIVER; -- 2.25.1