From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1835623-1527161507-2-8869318669375003429 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, MAILING_LIST_MULTI -1, RCVD_IN_DNSWL_HI -5, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=fm2; t= 1527161506; b=leSkYzJOanWw+YV15ffFyQ3kpYi/cdwAE0ts17PqzMQZe8O5ie hKrpX+KCyR8FYWbc0n7+kyS7p16wV/FLDzyxzDiFJKg2/ZrQNgNDQSwbmyjwi7t4 NdESSzAodhPA3nUaxVzE4lB2Xfs+1aR0n6rcjLc+2l4F2Jk4QF+hpLQVU7a35TwB Go39oSA9TN9Pec++SyQAsq8nidFM900d3xQlSllMgP66j4vCAy2YQFAVtjvdtwvZ aHnCDq2RyjULZ1+g1xtCB25S6xNOsPf44ZeG3G/6/4uqfMVAa/lEDBFUZmMQ6vSA jOMHFM5H1uw8EHiLDHB3gewvOBALrzo5eDDA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=fm2; t=1527161506; bh=YjqrNFeq2vlHkHOLKAKudokGT22WAH rMLbUwwzu12rA=; b=Ed1WaeUTdS8cV3xSp0E7Ttzv/ffhZQv6Lv2/wZIZo5tocw /xG0VARaruolLTaNSC4bIqfVKTLp2aO0TkHPnmHUphVDAbI6afXLAUdygWZ+5WJ7 FPiNiefpKT9JMi2AqVKXyvouxjSnbbGbYRarUgn5IgyP4dF+RjXgqAPOPP9ZajuH 7bxnyQeWvGz8u2lq5YG6AzOmG2Nj2sMP5zuqRwaWpXF258ff5AlIdYdq9wCM5Ne3 NzcXfwA4W4sO3MFDRK+uOcAPcyiCc044GbMBq6NlfTthjxSv6NIGLKDesW4t6+8O dqsLG7fYwEKggCWfZHzG+4uwZ+kEzc7ShkTB7V1A== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=kernel.org header.i=@kernel.org header.b=jyVgl2xu x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=default; dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=kernel.org header.i=@kernel.org header.b=jyVgl2xu x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=default; dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfBT3qLZsIvv0yIZpL7L9Ally3tw6FEnltvMUc5KWxBByoFHgiTUH1XHHHMdlpUjeg0kdKVps2+ATtaHumeLmYI4S1GO5kvxK0DhV+tYqtHhnDe/dLWAi qkxIH9Y/WWhAWhVr07sHDP6e0jgwva3fdYoDKoA893DqzctJa7X/JjARy+rE8LQHiCqn4EunhAPzX+uo4587IrNWbAO1IYcq9JTA2e32WSpG23PXSyGfvAE1 X-CM-Analysis: v=2.3 cv=JLoVTfCb c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=VUJBJC2UJ8kA:10 a=yMhMjlubAAAA:8 a=ag1SF4gXAAAA:8 a=ao7VijfDgrWXSWN4ZT4A:9 a=QEXdDO2ut3YA:10 a=Yupwre4RP9_Eg_Bd0iYG:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967268AbeEXJus (ORCPT ); Thu, 24 May 2018 05:50:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:42996 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967238AbeEXJuq (ORCPT ); Thu, 24 May 2018 05:50:46 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Geert Uytterhoeven , Sasha Levin Subject: [PATCH 4.9 88/96] serial: samsung: Fix out-of-bounds access through serial port index Date: Thu, 24 May 2018 11:39:11 +0200 Message-Id: <20180524093610.647235627@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180524093605.602125311@linuxfoundation.org> References: <20180524093605.602125311@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geert Uytterhoeven [ Upstream commit 49ee23b71877831ac087d6083f6f397dc19c9664 ] The s3c24xx_serial_ports[] array is indexed using a value derived from the "serialN" alias in DT, or from an incrementing probe index, which may lead to an out-of-bounds access. Fix this by adding a range check. Note that the array size is defined by a Kconfig symbol (CONFIG_SERIAL_SAMSUNG_UARTS), so this can even be triggered using a legitimate DTB or legitimate board code. Fixes: 13a9f6c64fdc55eb ("serial: samsung: Consider DT alias when probing ports") Signed-off-by: Geert Uytterhoeven Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1813,6 +1813,10 @@ static int s3c24xx_serial_probe(struct p dbg("s3c24xx_serial_probe(%p) %d\n", pdev, index); + if (index >= ARRAY_SIZE(s3c24xx_serial_ports)) { + dev_err(&pdev->dev, "serial%d out of range\n", index); + return -EINVAL; + } ourport = &s3c24xx_serial_ports[index]; ourport->drv_data = s3c24xx_get_driver_data(pdev);