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=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 47277C43603 for ; Tue, 10 Dec 2019 21:31:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0D723205C9 for ; Tue, 10 Dec 2019 21:31:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576013465; bh=RjW3nAfjJen7ymY+pr2pcyJdsQqV3ckNW602UmKrxCo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MbnUENvwkhVvxWI3nWN97c5K1iVe+iAQP6aWajJmOSrA7Wy7l1+4J8YtNvDK8+cpK J8xFDkWvcjti6ZYhPIGHZ008KjPV7L56rca3Po09IHt7iPllTfqwSZh0S4rz57bzAC vvwfYmYT+u4gt/EiaScnct/RyW/rQtcGGMXdFSQk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727573AbfLJVbD (ORCPT ); Tue, 10 Dec 2019 16:31:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:58466 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728247AbfLJVJj (ORCPT ); Tue, 10 Dec 2019 16:09:39 -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 0CD5A24696; Tue, 10 Dec 2019 21:09:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576012178; bh=RjW3nAfjJen7ymY+pr2pcyJdsQqV3ckNW602UmKrxCo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pIDXTCk2hUED0aRBXT+nw9GZuzeishEMZROwO7p3LxkRd/192pgQ7UxrclSnkT9QI wU7NX2xclnxRrBdaQ9uaJmtCYs0qR+pHXF2OYp/V8IozWuw/DfaFR3ul/Tk1fUNfn2 63M81QABE4SPcYrpokAWvT0mfOp7GtwSLLMBzzhk= 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 5.4 136/350] drm/gma500: fix memory disclosures due to uninitialized bytes Date: Tue, 10 Dec 2019 16:04:01 -0500 Message-Id: <20191210210735.9077-97-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210210735.9077-1-sashal@kernel.org> References: <20191210210735.9077-1-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 167c10767dd42..900e5499249d5 100644 --- a/drivers/gpu/drm/gma500/oaktrail_crtc.c +++ b/drivers/gpu/drm/gma500/oaktrail_crtc.c @@ -129,6 +129,7 @@ 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; @@ -185,6 +186,7 @@ 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