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 6A18BC3B19F for ; Fri, 14 Feb 2020 16:26:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39A24247D6 for ; Fri, 14 Feb 2020 16:26:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581697561; bh=2+cmvOTfjefLg7z9K6NEbzvp0YsZpeIAhXSEBWBCpx8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MfPikmMJzfycTGBaerJWCAAPln5BfZ/mrMZwN4BjUu4cPS52YluBmYvTLhmzRg6YL +UWRljaDytS1RcZqPrqm0KQGrKm6FkEmBvmm04j6VvmZFP+TWMRg6DCaNWIlO0vRiH iie61C7LCv9OIeyZr5Y/pKk+PSijfLPtnVIfdCcE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406264AbgBNQZ7 (ORCPT ); Fri, 14 Feb 2020 11:25:59 -0500 Received: from mail.kernel.org ([198.145.29.99]:36058 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405622AbgBNQZ7 (ORCPT ); Fri, 14 Feb 2020 11:25:59 -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 DC777247D0; Fri, 14 Feb 2020 16:25:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581697558; bh=2+cmvOTfjefLg7z9K6NEbzvp0YsZpeIAhXSEBWBCpx8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ebOfQOHIh/WDdgZnGkET95PdIykj5rQaPSEm0fDGO1p86ovkR7BrSWYcOJY699o47 EWDFn2+CLkSy3rqbWpPgYwiCB070/WOSiyAPrIMkZaQ9L0lsfXDHhMOMChi1+lRfBC YFg8MYJaEDfuAh59zPJvqT4+IXqzRXeiXg/qwgwI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dan Carpenter , "David S . Miller" , Sasha Levin , linux-ide@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 075/100] cmd64x: potential buffer overflow in cmd64x_program_timings() Date: Fri, 14 Feb 2020 11:23:59 -0500 Message-Id: <20200214162425.21071-75-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214162425.21071-1-sashal@kernel.org> References: <20200214162425.21071-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter [ Upstream commit 117fcc3053606d8db5cef8821dca15022ae578bb ] The "drive->dn" value is a u8 and it is controlled by root only, but it could be out of bounds here so let's check. Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/ide/cmd64x.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c index b127ed60c7336..9dde8390da09b 100644 --- a/drivers/ide/cmd64x.c +++ b/drivers/ide/cmd64x.c @@ -65,6 +65,9 @@ static void cmd64x_program_timings(ide_drive_t *drive, u8 mode) struct ide_timing t; u8 arttim = 0; + if (drive->dn >= ARRAY_SIZE(drwtim_regs)) + return; + ide_timing_compute(drive, mode, &t, T, 0); /* -- 2.20.1