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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 E58F8C47082 for ; Wed, 26 May 2021 09:10:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C1E4A61402 for ; Wed, 26 May 2021 09:10:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233661AbhEZJL5 (ORCPT ); Wed, 26 May 2021 05:11:57 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:6639 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233412AbhEZJLy (ORCPT ); Wed, 26 May 2021 05:11:54 -0400 Received: from dggems701-chm.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FqlTG3KXMz1BQTF; Wed, 26 May 2021 17:07:30 +0800 (CST) Received: from dggema756-chm.china.huawei.com (10.1.198.198) by dggems701-chm.china.huawei.com (10.3.19.178) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Wed, 26 May 2021 17:10:22 +0800 Received: from localhost.localdomain (10.175.112.125) by dggema756-chm.china.huawei.com (10.1.198.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 26 May 2021 17:10:21 +0800 From: Chen Huang To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , "Boris Ostrovsky" , Juergen Gross , Stefano Stabellini , Mark Fasheh , Joel Becker , Joseph Qi , Nathan Lynch , Andrew Donnellan , Alexey Kardashevskiy , Andrew Morton , Stephen Rothwell , "Jens Axboe" , Yang Yingliang , "Masahiro Yamada" , Dan Carpenter CC: , , , , Chen Huang Subject: [PATCH -next 2/3] xen: balloon: Replaced simple_strtoull() with kstrtoull() Date: Wed, 26 May 2021 09:20:19 +0000 Message-ID: <20210526092020.554341-2-chenhuang5@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210526092020.554341-1-chenhuang5@huawei.com> References: <20210526092020.554341-1-chenhuang5@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggema756-chm.china.huawei.com (10.1.198.198) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The simple_strtoull() function is deprecated in some situation, since it does not check for the range overflow, use kstrtoull() instead. Signed-off-by: Chen Huang --- drivers/xen/xen-balloon.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c index a8d24433c8e9..1fba838963d2 100644 --- a/drivers/xen/xen-balloon.c +++ b/drivers/xen/xen-balloon.c @@ -163,13 +163,16 @@ static ssize_t store_target_kb(struct device *dev, const char *buf, size_t count) { - char *endchar; + ssize_t ret; unsigned long long target_bytes; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - target_bytes = simple_strtoull(buf, &endchar, 0) * 1024; + ret = kstrtoull(buf, 0, &target_bytes); + if (ret) + return ret; + target_bytes *= 1024; balloon_set_new_target(target_bytes >> PAGE_SHIFT); -- 2.25.1