From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqFvc3wIVIwceg2S3DN7lg+Z8FkhCZaZ7x67eAI2wv3a1jpog2dPXKAS0wIkWo2BS3j9mJc ARC-Seal: i=1; a=rsa-sha256; t=1527155454; cv=none; d=google.com; s=arc-20160816; b=tsixMZNrrmd7f2NsHkLQFIc7jqL4z6B2yUJ1TekeU/UoRe26nJ/hVTkyhTVDuiNyyK HReEY3gIdS4aFz1PY/IPomNIet2SIz3UR6LAi2uf6bGsQnEQ4YJcmSBwqV21/7q16hxG sdf9CpydQQ/AKhxq+2AC2AEAai1/TYYinonUSHJB5ESPbz7YOOE1WCknLEJ/tylP4RDz DFtZYXmyAHDm9b149CMNjJJybLk8a0BgIJG2hLgO3+V1EjkgRc3AtnWhFpTPkdgqc+56 cetDGonYEeszR43PtYJlv1HIz8Mr/CYY/sABGfYCj5SsudzzStm5nBDfr7Fb2W+aTSJE LT2A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=/aBW6sZ7VXygnWCCWkNK85QhY6J/exESTdnQdIzd82w=; b=Sd7GkG04Y+i3mFa1rNFueli9hGxq1EWGrdTquwuprfrGt22iTPouPiyWGEHZH54hhd H8CFS7ndeRY4F94tKCgMEBKe0g2Jm7yU8GfnwE8CrU+7Dx6yadLGRJGX+TT50t+Vl1Dh kdcABFIeWUapR7jHZxQqYKOE9ip32gTyLelF1yetDu73wybrTieLwK40BMotSwDSYCjv 68sZByNeSK4BPx/c+P8LDpS6IkIsG9Wph4/IwLMlp2dM+EnrrmirJaXPDw3LMNf3oL/y 29F4zBGdIQCexvGbP8bscW2P7yEI7dfLKmRKgknztEsCbx0zCeoBPoT9nmT3QJgCbBOH HaTg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=DmLWtaQ5; spf=pass (google.com: domain of srs0=we5z=il=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=We5Z=IL=linuxfoundation.org=gregkh@kernel.org Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=DmLWtaQ5; spf=pass (google.com: domain of srs0=we5z=il=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=We5Z=IL=linuxfoundation.org=gregkh@kernel.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Geert Uytterhoeven , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Sasha Levin Subject: [PATCH 4.9 90/96] serial: imx: Fix out-of-bounds access through serial port index Date: Thu, 24 May 2018 11:39:13 +0200 Message-Id: <20180524093610.829108429@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 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1601338558091886920?= X-GMAIL-MSGID: =?utf-8?q?1601338558091886920?= 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 5673444821406dda5fc25e4b52aca419f8065a19 ] The imx_ports[] array is indexed using a value derived from the "serialN" alias in DT, or from platform data, which may lead to an out-of-bounds access. Fix this by adding a range check. Fixes: ff05967a07225ab6 ("serial/imx: add of_alias_get_id() reference back") Signed-off-by: Geert Uytterhoeven Reviewed-by: Uwe Kleine-König Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -2080,6 +2080,12 @@ static int serial_imx_probe(struct platf else if (ret < 0) return ret; + if (sport->port.line >= ARRAY_SIZE(imx_ports)) { + dev_err(&pdev->dev, "serial%d out of range\n", + sport->port.line); + return -EINVAL; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base))