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 1AAA7C433DF for ; Mon, 8 Jun 2020 23:45:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE7AD20760 for ; Mon, 8 Jun 2020 23:45:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591659942; bh=qwUWf6gPEAo0RWe2h0rpmiMF6XJTd6r4hEWaMEbOJBU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EiAaYXxgEOrl3GA1YfWI+ckGNbxZ7VqPgRr0SAGZ5S7GCrq+ro5DrqoB97JEbxeFt hwyDTBmFMWZNnNY4ih7lOWVM32G7wRKHTYFnDl+74YuFbZcGojFoWjL4RKjGnOrs3w smNi7+iYIB3C8x41/cgZ18UMBvH7h27r7RxKk1J0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732459AbgFHXpj (ORCPT ); Mon, 8 Jun 2020 19:45:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:54300 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731997AbgFHX0g (ORCPT ); Mon, 8 Jun 2020 19:26:36 -0400 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 C454D2078D; Mon, 8 Jun 2020 23:26:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658796; bh=qwUWf6gPEAo0RWe2h0rpmiMF6XJTd6r4hEWaMEbOJBU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J6G3QVILLq7sUxxjl/Etm6vxsO/2FMQRCTH72f6cayd5APDe0oZZrF6QT0a+yamI6 KKYEWUxGXNr7tGi81Mj/Odm913ug9yPAEhsI00Rx1/1EiNkfNA0ISdBgOysaq4YWjU dQWm4VS6d2L2Vl7asDezlA5C0wfsozPgzsTFzngQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andy Shevchenko , Sasha Levin , platform-driver-x86@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 70/72] platform/x86: hp-wmi: Convert simple_strtoul() to kstrtou32() Date: Mon, 8 Jun 2020 19:24:58 -0400 Message-Id: <20200608232500.3369581-70-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232500.3369581-1-sashal@kernel.org> References: <20200608232500.3369581-1-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: Andy Shevchenko [ Upstream commit 5cdc45ed3948042f0d73c6fec5ee9b59e637d0d2 ] First of all, unsigned long can overflow u32 value on 64-bit machine. Second, simple_strtoul() doesn't check for overflow in the input. Convert simple_strtoul() to kstrtou32() to eliminate above issues. Signed-off-by: Andy Shevchenko Signed-off-by: Sasha Levin --- drivers/platform/x86/hp-wmi.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c index 06a3c1ef8eee..952544ca0d84 100644 --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -474,8 +474,14 @@ static ssize_t postcode_show(struct device *dev, struct device_attribute *attr, static ssize_t als_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - u32 tmp = simple_strtoul(buf, NULL, 10); - int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp, + u32 tmp; + int ret; + + ret = kstrtou32(buf, 10, &tmp); + if (ret) + return ret; + + ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp, sizeof(tmp), sizeof(tmp)); if (ret) return ret < 0 ? ret : -EINVAL; -- 2.25.1