From patchwork Thu Aug 20 09:22:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265658 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 E2D49C433E3 for ; Thu, 20 Aug 2020 10:33:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B269620658 for ; Thu, 20 Aug 2020 10:33:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597919636; bh=/gOzTMPZIOTgJFu167RPmJPiUuZ4b9Oq/6VRU/ZXW68=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lcUJNfFvsVY88wA8fmr5x9dxzbw5CjXm1k6CT1dcTC95RUfAQLKS5gkuxJ2+bEqP7 KDRatzFBqODTyQm1DoiG5tReGinRJ5g2VkEvOSR9X1rU5ZnSUS7nbvlDddyUzZwcht 2x6C9iC87eDhqGF4RcZuaX1pzJxJtY4fQiT8qfbA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731082AbgHTKd4 (ORCPT ); Thu, 20 Aug 2020 06:33:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:43470 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731449AbgHTKTg (ORCPT ); Thu, 20 Aug 2020 06:19:36 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 7628C2067C; Thu, 20 Aug 2020 10:19:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597918776; bh=/gOzTMPZIOTgJFu167RPmJPiUuZ4b9Oq/6VRU/ZXW68=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AYzN2/WcSNQnhryNynt66/diSt3HMNR1YVYEARcaQEKJoZp13AAMUBO0DtEP+uz+d YP1uEmE4z9xQMAesAw7+98qvDVs9pW3HDWPRsaWNRe6JBx3OdPi69FaoGgPK1ljsaR XWwWQuY0fxpbV8D46Y734275tY0d+CQgSX4fA0gw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tomi Valkeinen , Jyri Sarha , Sam Ravnborg , Sasha Levin Subject: [PATCH 4.4 062/149] drm/tilcdc: fix leak & null ref in panel_connector_get_modes Date: Thu, 20 Aug 2020 11:22:19 +0200 Message-Id: <20200820092128.741390964@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820092125.688850368@linuxfoundation.org> References: <20200820092125.688850368@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 0af8bed7ce1ee..08d8f608be632 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c @@ -177,12 +177,16 @@ 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;