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,URIBL_BLOCKED,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 571B3C433E0 for ; Mon, 8 Jun 2020 23:27:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30475207C3 for ; Mon, 8 Jun 2020 23:27:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658879; bh=0ipDXHuXsr5Qaoa9TOtSQq6ymopP/5G4FnF3eZVMeJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tWV9nAgzodCz6aoYTcB3Vcb38A7LrZV3oZm29re3qnyJ025RsXGY0OHpaeVBRWBYd hLe3c4zJZf0aB6byKFd06IhPYPpkEWcE0QAy9qMMxk6z6fKEHeCWSH4nfDw6tnXLXo MxiJ4DN1Dp9LKT1A0DplAendqm5Yema+aGB/qBdc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387658AbgFHX16 (ORCPT ); Mon, 8 Jun 2020 19:27:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:46908 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731298AbgFHXWV (ORCPT ); Mon, 8 Jun 2020 19:22:21 -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 B1FC62086A; Mon, 8 Jun 2020 23:22:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658541; bh=0ipDXHuXsr5Qaoa9TOtSQq6ymopP/5G4FnF3eZVMeJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XERORfXJ56DHhTcIG03kBB8k3pqZeOvTUY5FS/VJi8LFU2zKm3Y8jfiYxgd5wDSBh flqEVKXZy4Xr91ZOh23LII0yCq3VZiq+Dtix/WICVt2OXEpxL/noc2P4WSbR82lT9h XaIxI5ksYuh29aj0Sd7skhllZ6erDxSKd8ALadAI= 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 5.4 163/175] platform/x86: hp-wmi: Convert simple_strtoul() to kstrtou32() Date: Mon, 8 Jun 2020 19:18:36 -0400 Message-Id: <20200608231848.3366970-163-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608231848.3366970-1-sashal@kernel.org> References: <20200608231848.3366970-1-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 a881b709af25..a44a2ec33287 100644 --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -461,8 +461,14 @@ 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