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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 72221C4332F for ; Tue, 7 Nov 2023 12:43:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234962AbjKGMnc (ORCPT ); Tue, 7 Nov 2023 07:43:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43972 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235355AbjKGMnG (ORCPT ); Tue, 7 Nov 2023 07:43:06 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B417A33D87; Tue, 7 Nov 2023 04:30:25 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F231C433C7; Tue, 7 Nov 2023 12:30:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699360224; bh=SVFAmaxVAKpmkmwbZ/KzKgNcJKhakvwFy9xtqRoAh1w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JX4uiWfoOWV65OKqE52HHS74EQYILwzjPxVNgd7l5oCRyrbZ5HJ0y6u/tqUQLzbsq BLei1PJotiNvALXB72fSgok71g//HGSn3Iw/9FI2jMr6y4c38XNgVdrdkcQuxxgRua Y+Wqmo5bX0sdheOwv49VkdcE2F00dwwz5raUnw0rjCqjqGGBUSvuQAnFlhTa9SygnO 5PFY1HUuxXZ3uigfc1VNslFo7DQIDejxdMeAutzpIFTf4ELlTtwEmBjejYJWwsC0NB lz/kNJnyvidFOGQH5hEGmaJPmVBmZhAKBUk/ZJJX/PR/FsUHlpOhZRU2nec/1VKylC S7xId+DxGJHLg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ma Ke , Neil Armstrong , Sasha Levin , linus.walleij@linaro.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.15 13/20] drm/panel: fix a possible null pointer dereference Date: Tue, 7 Nov 2023 07:29:07 -0500 Message-ID: <20231107122940.3762228-13-sashal@kernel.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231107122940.3762228-1-sashal@kernel.org> References: <20231107122940.3762228-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.137 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ma Ke [ Upstream commit 924e5814d1f84e6fa5cb19c6eceb69f066225229 ] In versatile_panel_get_modes(), the return value of drm_mode_duplicate() is assigned to mode, which will lead to a NULL pointer dereference on failure of drm_mode_duplicate(). Add a check to avoid npd. Signed-off-by: Ma Ke Reviewed-by: Neil Armstrong Link: https://lore.kernel.org/r/20231007033105.3997998-1-make_ruc2021@163.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20231007033105.3997998-1-make_ruc2021@163.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/panel/panel-arm-versatile.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-arm-versatile.c b/drivers/gpu/drm/panel/panel-arm-versatile.c index abb0788843c60..503ecea72c5ea 100644 --- a/drivers/gpu/drm/panel/panel-arm-versatile.c +++ b/drivers/gpu/drm/panel/panel-arm-versatile.c @@ -267,6 +267,8 @@ static int versatile_panel_get_modes(struct drm_panel *panel, connector->display_info.bus_flags = vpanel->panel_type->bus_flags; mode = drm_mode_duplicate(connector->dev, &vpanel->panel_type->mode); + if (!mode) + return -ENOMEM; drm_mode_set_name(mode); mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; -- 2.42.0