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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 78D3BC43603 for ; Tue, 10 Dec 2019 22:42:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 427272053B for ; Tue, 10 Dec 2019 22:42:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017729; bh=gYXfXuxRY9mg/QgwO8RreWgUOh9JEFtJ4kuEz0sHxng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kuOzxGprRhAIdP6nhlWP07C7aEAv0mP/8H7RFRJ2E/uM/sfuO81V05qxCZ6JMfud7 XKtwFwV78RyIVHe1cmgMoOg1oSi4Mn3kMDYt4S+JpADMyysyQb6SVyA4pX1e/WZbrO vRGOe1SW0HZYzETfc5nR07Xqxa3aYEV4teQuTCs4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728580AbfLJWbc (ORCPT ); Tue, 10 Dec 2019 17:31:32 -0500 Received: from mail.kernel.org ([198.145.29.99]:51382 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728298AbfLJWbW (ORCPT ); Tue, 10 Dec 2019 17:31:22 -0500 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 10A9C2077B; Tue, 10 Dec 2019 22:31:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017081; bh=gYXfXuxRY9mg/QgwO8RreWgUOh9JEFtJ4kuEz0sHxng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ghNbuEkXpFmnCRa3WVCFk/sB8bZjR3OY+Gfrw8TKyF/CtnLCN7hAROClrM/VX7nrn LfvcRyMwmRAMF5ZghzCyFJGtCH64bwz4/r5KS4BJIgI4R27GFYLpazKesjBVcf2W9Y YyZWyw4XkB9aVpQQdLsuENT2OUxlAom2fIHcK5jY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kangjie Lu , Daniel Vetter , Sasha Levin , dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.9 38/91] drm/gma500: fix memory disclosures due to uninitialized bytes Date: Tue, 10 Dec 2019 17:29:42 -0500 Message-Id: <20191210223035.14270-38-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210223035.14270-1-sashal@kernel.org> References: <20191210223035.14270-1-sashal@kernel.org> 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: Kangjie Lu [ Upstream commit ec3b7b6eb8c90b52f61adff11b6db7a8db34de19 ] "clock" may be copied to "best_clock". Initializing best_clock is not sufficient. The fix initializes clock as well to avoid memory disclosures and informaiton leaks. Signed-off-by: Kangjie Lu Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20191018044150.1899-1-kjlu@umn.edu Signed-off-by: Sasha Levin --- drivers/gpu/drm/gma500/oaktrail_crtc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/gma500/oaktrail_crtc.c b/drivers/gpu/drm/gma500/oaktrail_crtc.c index da9fd34b95505..caa6da02206aa 100644 --- a/drivers/gpu/drm/gma500/oaktrail_crtc.c +++ b/drivers/gpu/drm/gma500/oaktrail_crtc.c @@ -139,6 +139,7 @@ static bool mrst_sdvo_find_best_pll(const struct gma_limit_t *limit, s32 freq_error, min_error = 100000; memset(best_clock, 0, sizeof(*best_clock)); + memset(&clock, 0, sizeof(clock)); for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) { for (clock.n = limit->n.min; clock.n <= limit->n.max; @@ -195,6 +196,7 @@ static bool mrst_lvds_find_best_pll(const struct gma_limit_t *limit, int err = target; memset(best_clock, 0, sizeof(*best_clock)); + memset(&clock, 0, sizeof(clock)); for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) { for (clock.p1 = limit->p1.min; clock.p1 <= limit->p1.max; -- 2.20.1