From nobody Sat Oct 4 00:32:11 2025 Received: from SEYPR02CU001.outbound.protection.outlook.com (mail-koreacentralazon11013057.outbound.protection.outlook.com [40.107.44.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D117E3376AE; Thu, 21 Aug 2025 13:41:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.44.57 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755783702; cv=fail; b=pLsy6NLsqbb6qCREghnG8dsWTipZUne5/NmbuyEdfhj8SGLWEeeToApQxrZUX3ZrnAHccPCaxRBsJa+1Xyxds5rnWF70ui14TwjF6Xbw06eVpWpDsI5iLRcT0y8W1gEcPDTdQhB3tShGyaWdZU+Y+PccpGy77UrrRgaIUeelw9A= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755783702; c=relaxed/simple; bh=mS1m5uivoI4tD40RLXOMRVpYOZXeBtlLedazA6lA3WQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=Dds7TJhJ/G5LgfgRU3c7thFHeWvKFgQQFjmHZMhdG0LXwWBmSyLXlBi2XmHBJtLBCxMlv9qjnkU/CQ5NiIEf9VhHBQQznX98ZLSE5PofN/o0/edNPz1xk5KR4HKlt7vy1feI6eD513lHi9lnKdcuNoinQHneMAZdRvohp1DlhMs= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=vivo.com; spf=pass smtp.mailfrom=vivo.com; dkim=pass (2048-bit key) header.d=vivo.com header.i=@vivo.com header.b=GRZc4T4n; arc=fail smtp.client-ip=40.107.44.57 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=vivo.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=vivo.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=vivo.com header.i=@vivo.com header.b="GRZc4T4n" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Kni8ZOK+qWFo/4rVZ3hpYmH7m22iDCuSjyMv9pOvv0BHWrz6In8wp0TuZ+VVJv3iDgri6p0wpJvCOkVHn4ym5WmdAJaOuJkSikQIWZutQVHlGrNMpgsYe86NVfkjscZUfsaPsfX3GHM7YNFapxJ/wcGkvin87Jg6RYsyUIknzeOFacvXa8JPR760RHHa4+lPCzehx++UFRftsQlDyqpv1pszUvoxFjgAKcf8KHJ8p1NpWn26rJG8pNSYA8jmu/LgW3tEaTudpqfXI79cO1j2vOuvXZzDda6uNEJoyFWc9KMNNzj4fEhJaNxsXgeLHqQhsLxQo07jJ7UKIJVjm3fhkA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=LrUp3JrPF1PaIAJ0ECly5MjFT9ddJRGFqcLv77Q2Ums=; b=jZ3EJMSB3eff8CfY+c2qD8t9CXugxAs7LYLnhZlva+czGnZCaNhVVruGQvk41GY4x3lCWQNrblpwv1c1RCJ/XkP5Fmv6mZ+EGt9Ztq7E0C9uvIm4M6DoKerXTqvY9dMM+5oXGIktHHrcPfkPD7+82drGG/4k6AYFm6fh6LmLyui2EfYHd+Xjr2rRge4/UyD4UWHspU48io/EmvvpkEU3bUog6zxCBdq/Ee0gLU86yYOXI+fN/KR5XUT/8PT8K41uDNTQ1+puLqXFEpDQWI5gK6OhpQ0keR/QO/soMJ9FFu3Burs6uKRu7uNNzM62osEJ3mbio7BQCaBSFF3KtUhoSQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=vivo.com; dmarc=pass action=none header.from=vivo.com; dkim=pass header.d=vivo.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vivo.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=LrUp3JrPF1PaIAJ0ECly5MjFT9ddJRGFqcLv77Q2Ums=; b=GRZc4T4nlEXO4Bx5A1aFkAuTkvYFwL1Lb4J/8aFGGs9PU2MSnDS3xO1XbZzP9crMaAxFEDHfNR9vfiv1H6QZJIB/1agMkIRqGFeadpvPADus627Te6e4M+MHuuo4w1UNjkKLudY35OXv0sL0k1fxMY2dseuzlNjsrs3PBTBameKznRozjNVxwGPo5t397flFix3L8LspRrj95GftnHyHWCYHD2dX7EwmIYFOT16dIlCGjEpg/UvTiFKYGoxJ06HlAkst11MjPhOodTs16IwpRQ6xi+kXpLo/Gxru7P6FEMheLTVZQmv8b+2oGfjg7zuW1xDY5fJ7QFHhKv7YBHb7Hw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=vivo.com; Received: from SI2PR06MB5140.apcprd06.prod.outlook.com (2603:1096:4:1af::9) by TYZPR06MB6215.apcprd06.prod.outlook.com (2603:1096:400:33d::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9052.14; Thu, 21 Aug 2025 13:41:38 +0000 Received: from SI2PR06MB5140.apcprd06.prod.outlook.com ([fe80::468a:88be:bec:666]) by SI2PR06MB5140.apcprd06.prod.outlook.com ([fe80::468a:88be:bec:666%5]) with mapi id 15.20.9052.013; Thu, 21 Aug 2025 13:41:36 +0000 From: Qianfeng Rong To: Davidlohr Bueso , "Paul E. McKenney" , Josh Triplett , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Boqun Feng , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , linux-kernel@vger.kernel.org (open list:TORTURE-TEST MODULES), rcu@vger.kernel.org (open list:READ-COPY UPDATE (RCU)) Cc: Qianfeng Rong Subject: [PATCH 1/2] rcutorture: Use kcalloc() instead of kzalloc() Date: Thu, 21 Aug 2025 21:41:16 +0800 Message-Id: <20250821134117.6347-2-rongqianfeng@vivo.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250821134117.6347-1-rongqianfeng@vivo.com> References: <20250821134117.6347-1-rongqianfeng@vivo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SI2PR01CA0011.apcprd01.prod.exchangelabs.com (2603:1096:4:191::6) To SI2PR06MB5140.apcprd06.prod.outlook.com (2603:1096:4:1af::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SI2PR06MB5140:EE_|TYZPR06MB6215:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f267b76-51a3-4388-1003-08dde0b872d4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|52116014|38350700014|921020; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?fY8umZVauqgD+sA0w/AXUJoJSXI+94v0c8yTN6ClZpTiTNVhHCtDqGdvK1qu?= =?us-ascii?Q?N4FrPCL8OjUqI+qVb4lC7kc0Mf+fEKYhPMNNcWiDBz0sIWHNG5H00h8jyAwX?= =?us-ascii?Q?EQIaPU3LckzWB89GXgwQf5IuTNHKEvuUgmJSI8TTMnPtn6ZN3UzxOAGs4jbo?= =?us-ascii?Q?jDPL1OfbyU1tii7TomCLjG2Ih5f/Arnv29ul+ErWJ4XRwNEp7rzv3fFlQUY8?= =?us-ascii?Q?2qcj90JWRJL4JYCCmcC1lYuplEhrFS0czoBxRgy8GhtYlnJNR3iJ7JVEybeA?= =?us-ascii?Q?r9VxTziCEexKydY0beRuOeLZCeA23VYITFlqFXFyUuZe9s91tHx9RGI6d6T+?= =?us-ascii?Q?bl6/QqLk4bNGgQ6TNeBsw7QNaKWxoJU2R8t05e2KDfPAGtAe60n8Y2YGSb22?= =?us-ascii?Q?7zH4TYNxXnQTd67rzSg6+L3t7sKJ5ATDqDyPnxUOm6QkK/Nh54tBiWpIdD27?= =?us-ascii?Q?JU/33H4YzVjAk0jurw1fwyx09iImO46nFwA1uEYiBUKCyXfvKSTtztTBvqng?= =?us-ascii?Q?VERgmxi5xO321NCurm+hlHENeFgp7S4OAA1+3dtx1N1l1PsFeUNPLsquwH5u?= =?us-ascii?Q?TueFzm8qfIfCMHViMX9WjJf167QmgFuP24mA0bwZMB6RoLFoHE63eRcym022?= =?us-ascii?Q?Kv5NgZrMOYKSFWD9sifiQTspGBcqeNqhlq4rpB81DM0QRWWh54SQN5mz0RFp?= =?us-ascii?Q?a031kQIkz6TDA9SmbyNV20hf8vVMkM9RfdiqgnvqqPcrje9TMXPqOzay8ZSO?= =?us-ascii?Q?AwaRXaWKNiu8dF1Bx0EJdNneFZq9NAyeu/Z8g0K2HFnaux6HKCKlqy6h6FxV?= =?us-ascii?Q?YoL9rkLe5iFvgEhNX7AflA1l1A4bDa9ReZjjHJrYHUJj7GCbhF33TkdXjs2C?= =?us-ascii?Q?A6Omo3g+2ylssaHyrtlIInFbgszdH+JY2eHEXM4AdQnBTwwAXAt5OaFo49q1?= =?us-ascii?Q?oxXJfemt6ui3+NeAznZLunn2+jzS3yU3zLzbjOul+JeHXaRm9Me4jekSwK/T?= =?us-ascii?Q?biu9WCFbdGoaDJCOG0E8nR8BXtiSUpY+hv1zerYix6Ug9AEUlg1G+EbMfeJo?= =?us-ascii?Q?wT/TVgD/bC5uOfTgm9Y5Nz/NtMzMDmbD2w/+tTSj8Al0bwbhDrn4GU1Hw3Lu?= =?us-ascii?Q?Fowjl0sN601ljQO4XHucjOQYugWVTj1d/MKVyP7EHBNRYIpc53KNAMDQhxbl?= =?us-ascii?Q?hIaT0srluRXMtSr1Kla5nGNJz8X6Zpo7xRttkWIeN5DUzXBjrP1+kAaKpRBb?= =?us-ascii?Q?K55SVSdBILio/032xdbsE9vziYyOkSVrxim9fal2JvRSbEr0gZq8tG38hxGJ?= =?us-ascii?Q?+17o+v6Tj1XTbgzJBWDEGBHRccD9xq0btEt9Is/GrtrWq5S1F1aex6KP4rCx?= =?us-ascii?Q?GPvPGSHiJHq84C1bDY8PXDFIAunnuEjwIpV/hC9xdjkMaBbx3ONL51Q5kWIb?= =?us-ascii?Q?hkMIJQSaM5uYD5HR4bOmJalzwiaaSMMJElnT3EyYrD92LcSIYlOPJI3V4Erp?= =?us-ascii?Q?95dRtKygEFmDSog=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SI2PR06MB5140.apcprd06.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(376014)(7416014)(52116014)(38350700014)(921020);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?U03rizvFF5cuk1qLZp0zHbm0UAbeLo0RjT9GQ8L/l7vTnUX/G0ntkgofMQZA?= =?us-ascii?Q?cReRoN559pMGXfF44t3As+aZzJU2p+cKnCOstqSXB27xg3ibVEzjHjd2fQQq?= =?us-ascii?Q?oOu61iGg4QlZynxDOx9iCdC9hRYzF/pBfpDRP2ZZ2tpfXBzp26T/g3hW+kQT?= =?us-ascii?Q?9j6++1Wrs25qGljweX8xgghKE/rkWZ5xYHYidTAolkDpg+UQnQ21Fq++keDL?= =?us-ascii?Q?O6uiasPNu+wOTI298lD/ZO2A5hYojqvaj5Jn5eRoj02qps3ENhDuimcfvOI3?= =?us-ascii?Q?bPR8b7VoUPWtBM6p5FsmtbzXdc9UYgyAZUlC41sbDwytS4clxCH7OXADbM+L?= =?us-ascii?Q?eMj0HQ0mFjwAy56gbqPs7Itc+RBIAjoboAoEfeBeTtZ+tCss81opOfGVQrcP?= =?us-ascii?Q?qaeA4jZuZ64PW5t3mCS3T+dgrAFwmdpffM9MgvZKwwWWXzEoUd+KGmdOU1lm?= =?us-ascii?Q?AMiGM2m5KXRz6vpNvwz6fwSZROUwGKWz8pBKEJfKzm5mRhC8WGTg8B/J6RKl?= =?us-ascii?Q?UodtG794lU+3c8akpDEtSYdtmyU2FTHH5ZxbVbLICkNm50DJbEa4Fi1JfmXX?= =?us-ascii?Q?OdsC8pV8nEbBt4UF2w7EGVPafhwe3mJJ3HZp2764eMUIrIVb1P7ile/lMA3i?= =?us-ascii?Q?JLvdNwOjPvrOHd98Qp9zicJlzGcDSgTUBOGV6e8yRu8v5N7+NBBfoMfbJhYi?= =?us-ascii?Q?MZN6C8dSKy0B9sfNORZ9TgunnA2U/T4XlHOIRAIEFYLobRVBGxUuGxePcmUf?= =?us-ascii?Q?8psa29FKEVVc/0o8vdzhtcEh3tWk5HrRiLMAEE+/VBQQ8ZO7mB3CsQAxRca4?= =?us-ascii?Q?bsdjPMRFKVx0l5zecPtNP5PG+ccM4fuJ49xzJ3CQr4fi364LpYA3EO7ee8ki?= =?us-ascii?Q?KwJV/J1bHpSLE1+ZtSx/A4SNF0DbkTqiFGpVjRZJaC1scQ6NzLy3qdXg/0fy?= =?us-ascii?Q?mdn4e70Hr5PQAmFHIaLD5gOFDkRJugvG+hOCj1aFiqO5wlXGOQBuhkUmLZWU?= =?us-ascii?Q?JX7rVePNTaPb74vG6rN7s0iZqBns3FvzftqmEsdZMmyHTxYU2Xe3xgsQGo3n?= =?us-ascii?Q?xQnKCZQz+ifnO5TwXBO0cduBU8RoT/lUNSpZDInN+fZT4ioub1qP5tPLTRsr?= =?us-ascii?Q?yP2Koqfyd6+oB9X5DxBU7i1jTkDYHUbJ7IhwZkERHYSXtBjYVvHJzxob1I1+?= =?us-ascii?Q?tlku64xBqVINnvMN5hPv6Skoo4GrW6r8oRC8OmOmdsOSra+bqa15eOl1v7YA?= =?us-ascii?Q?UD9tRFN26FENGnTNGfoUpyi5sfnJQrno7vXkz3nFU92tc+dHEqfkjMxfrp2y?= =?us-ascii?Q?2c0AceQYo0Dokd/cEO1vVCjCuIytDYiACXTiTaeiMpNKRVp3X6BbG2HlvEVk?= =?us-ascii?Q?hPIAT0gb2Bd7AvNBDnH9dq/SGQ7HXp4dtwzSIIho6PVuKhus9w20s3j8T41f?= =?us-ascii?Q?EH3VjV8SUXD79EGgCj9ZHwBlcgM2eGWP3LGQGqYVtXKbQwhTnKsaqFuG+8qp?= =?us-ascii?Q?mnzBD1sUMdVRrHeadWK/aJ4NfdcplD5aQyrGQ56r73UCQZsu0U8F/+3/Dezs?= =?us-ascii?Q?Hu1E62QnlYZAUn7fxtzl9HJiVE3uV3PgWJqcm03J?= X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2f267b76-51a3-4388-1003-08dde0b872d4 X-MS-Exchange-CrossTenant-AuthSource: SI2PR06MB5140.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Aug 2025 13:41:36.3471 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: OCPUWR8RpBV3yH+E3iUZkRao4r5m75sbKdEhTBDxWsbZGC8WjGYA1P2o8enxe730bHR8cdPddr5LPEsHLenZRQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYZPR06MB6215 Content-Type: text/plain; charset="utf-8" Use kcalloc() in rcu_torture_writer() to gain built-in overflow protection, making memory allocation safer when calculating allocation size compared to explicit multiplication. Change sizeof(ulo[0]) and sizeof(rgo[0]) to sizeof(*ulo) and sizeof(*rgo), as this is more consistent with coding conventions. Signed-off-by: Qianfeng Rong --- kernel/rcu/rcutorture.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 7a893d51d02b..60cac761efc9 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1571,12 +1571,12 @@ rcu_torture_writer(void *arg) return 0; } if (cur_ops->poll_active > 0) { - ulo =3D kzalloc(cur_ops->poll_active * sizeof(ulo[0]), GFP_KERNEL); + ulo =3D kcalloc(cur_ops->poll_active, sizeof(*ulo), GFP_KERNEL); if (!WARN_ON(!ulo)) ulo_size =3D cur_ops->poll_active; } if (cur_ops->poll_active_full > 0) { - rgo =3D kzalloc(cur_ops->poll_active_full * sizeof(rgo[0]), GFP_KERNEL); + rgo =3D kcalloc(cur_ops->poll_active_full, sizeof(*rgo), GFP_KERNEL); if (!WARN_ON(!rgo)) rgo_size =3D cur_ops->poll_active_full; } --=20 2.34.1 From nobody Sat Oct 4 00:32:11 2025 Received: from SEYPR02CU001.outbound.protection.outlook.com (mail-koreacentralazon11013057.outbound.protection.outlook.com [40.107.44.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A46473376BB; Thu, 21 Aug 2025 13:41:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.44.57 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755783704; cv=fail; b=AMGiVNTJVV4Bs6VChC1uHyE3GJw4mymfzZGKbPbuMjgv6wc+a/gxQBQhO0/M15+nKNkVzty5wRkt6Xhuy80s9R5OgATFfn8Efmw0qs+IWBpfIF+djAXrTFChh+0cbd7vOoPPcwVYQ/nQlQ7Krywaxkxn4Ir1OAnRK0rv8BPaxXU= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755783704; c=relaxed/simple; bh=9+Ym2MgmqoMIC+MjY8EoUzgvJ4sgYMohfL6IJEaJxZU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=oWDuL59BLZJ4oihDeNoyIjbtkvl6GV0TZBizUMXAbka74i0zlb9+DH6O5HgZ1pVZr2L7E3v1Y8ehEOnXE44WZMpByw72WGF93cF8oEJGq2Pey/uZimvmh34l8ldOAxMvuSGAHvRf+JxIC+7RRM26QKFVEYsMTtdFjeUgwfbWrYI= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=vivo.com; spf=pass smtp.mailfrom=vivo.com; dkim=pass (2048-bit key) header.d=vivo.com header.i=@vivo.com header.b=dvqrnUBo; arc=fail smtp.client-ip=40.107.44.57 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=vivo.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=vivo.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=vivo.com header.i=@vivo.com header.b="dvqrnUBo" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ct+n11QThQjE0A+Q6X4zbna65o9uEBep6aXcmgVYzeKEFrg2YP6U+hwknszjtYsXL/FKTBhpbmxD3z7c+QlmqhtpfFJMw9VHrpHf7nt+OA28qvQbK5AtQGt9HCaucVubVDAXdt6E3CyxXLKzeDaWUlYhL1EAxYt3JbfkJMc49B1vK/DUSGpMwmUj3qk3/gts+uTrRCrowe0cAnSH1GRjwOUqHtPlpzazmh+LfrxNeS3ORcYXv9q/BhD2WbbGJONNI/6Wsv2qN9+qaobBBagZAWaK9nNknyK2IS4L0eWLfBX9pXoPbs+Mt5+oMep+ge+Tb21SKgFaOVmi87iAKxQvmw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=boF4xt4TAk4PeYj28tHz9T3pExqliIiACzlUxuLO22k=; b=B9VZvPS2cUGmZSZfgnTPLjkuKdhraLPzd9FaHtZeaC722q6p48MzzFYyosLYjlU3zoZS4tA1YMoTykwgALZeD7w1rJ1qfZsR+2Cpjmxlsd/m4PcSVO8bi4Fq82jMlATWWyHFOB4NkgsUyHmYVMGB9OprLOlB/6b57KZK2cnPSC7cTOCYgp+n4Srd7ObZNowtzHzk1UE7FoB2ChN2HwYA1di9NnsDPWin8nn5oPJbsaX8KtV9ji15nu9B7u59QBpVFKPk4l48WnrmUbUKMMcO3LiP5Brct0PJNqR1Eeopr+HnON0F1ZDmI08UwId/pAiCHpQyL+Cty3kWpO2ysIvQfg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=vivo.com; dmarc=pass action=none header.from=vivo.com; dkim=pass header.d=vivo.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vivo.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=boF4xt4TAk4PeYj28tHz9T3pExqliIiACzlUxuLO22k=; b=dvqrnUBooQb/bPVUpcECZ1VyzJUEkG/o1DCmvf17HxtNyKkBcRKskjDL7lwmIv9BjDE3NXHp0dGvw3tJz5Vf9DF9CN1wX5zW/Xg5bDHn1aQ/JRGyNg8CFYSFkdpFJywiYe2QXEXRjfyO74I3qVqB70JzRkigAPKID/MAfFi/wCnBIX5/x+3LNGb2+X5nP4g7wuWNCUE0qstuNhrXJcGfC/p9LJs9x71+XP7FfvFvGLjr6UF8Z/Z8ch8nlbxWMF5NkcuA6iSxkZaNH1GOHc3WfUvny1QLXFpzKLkse9HD/TR1Ppe9Y1GVhnuHt0JpAr0QmFWi22BAQPenMWnFYj5QfA== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=vivo.com; Received: from SI2PR06MB5140.apcprd06.prod.outlook.com (2603:1096:4:1af::9) by TYZPR06MB6215.apcprd06.prod.outlook.com (2603:1096:400:33d::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9052.14; Thu, 21 Aug 2025 13:41:40 +0000 Received: from SI2PR06MB5140.apcprd06.prod.outlook.com ([fe80::468a:88be:bec:666]) by SI2PR06MB5140.apcprd06.prod.outlook.com ([fe80::468a:88be:bec:666%5]) with mapi id 15.20.9052.013; Thu, 21 Aug 2025 13:41:40 +0000 From: Qianfeng Rong To: Davidlohr Bueso , "Paul E. McKenney" , Josh Triplett , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Boqun Feng , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , linux-kernel@vger.kernel.org (open list:TORTURE-TEST MODULES), rcu@vger.kernel.org (open list:READ-COPY UPDATE (RCU)) Cc: Qianfeng Rong Subject: [PATCH 2/2] refscale: Use kcalloc() instead of kzalloc() Date: Thu, 21 Aug 2025 21:41:17 +0800 Message-Id: <20250821134117.6347-3-rongqianfeng@vivo.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250821134117.6347-1-rongqianfeng@vivo.com> References: <20250821134117.6347-1-rongqianfeng@vivo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SI2PR01CA0011.apcprd01.prod.exchangelabs.com (2603:1096:4:191::6) To SI2PR06MB5140.apcprd06.prod.outlook.com (2603:1096:4:1af::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SI2PR06MB5140:EE_|TYZPR06MB6215:EE_ X-MS-Office365-Filtering-Correlation-Id: 7df98ef3-a18e-484a-374e-08dde0b87538 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|52116014|38350700014|921020; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?BkoA3uqLH9TbHhw0vFHxXqNRHwBfVuUJjU91S+jctI0z4+3m40re2F+4Pavr?= =?us-ascii?Q?W9sbcnlVi48LsKyFjmaKKVbn/ESWj4z6RE5FEbEtJSqJO1Nfb0y5f7wVoQc+?= =?us-ascii?Q?WTbMYSyPV81O182bFi2TdlmX+rDGJrFAYw89fosnH6OfVzIW/6A8dgmHtncz?= =?us-ascii?Q?ISZqRZZjE4KQt9HF83Vc0oM5YUwhoAoz/UDqW+m19IIVUgzrndX6EPwaRmku?= =?us-ascii?Q?n0bbgipy+9SbyzzjX1UzHv8I056WfG1tnpTuIbHtvWgyAI1fKe2jLM6YXMlR?= =?us-ascii?Q?cwNSopGxszNA9WhpDFQanqcZg293BMd0LFjDh5I808DGRNSRzMjGFAlY6Yc/?= =?us-ascii?Q?TCw6QgyIEi2IPvBKvgHklvxrjr1iEOOzXaLUBQy1CF6OYvSfxmArOBNcg54V?= =?us-ascii?Q?MlLkHWxSiTtN9Ghtn0zsrlUhekfeO7Rgtry7cLbsUff7kV5VrTRBtIolqc1Z?= =?us-ascii?Q?jpz5pbhKEj73MVWjvaXBbliZfaMYik393OhwMR0/ffC8q/Y10PUSDO3r02Ic?= =?us-ascii?Q?nU6LIxwEz3h6B8YSzYK16IWpBhI2GL1BHi+hLdsNJ8Ag39vDCOZctwxsCI8a?= =?us-ascii?Q?rclC5UlGDLqvLa+Yar4COK/VoFNsx3DyJ+5dYJKnDNlZVGG3Sf32iyFYZjEu?= =?us-ascii?Q?/1yPJpnXO6hX4WEtsWUGrMhuCmO3yF/CPAtMpGUSOVKrw4SasK+QcS1cY98s?= =?us-ascii?Q?G11pDkABwES/AEVknVsSd/n0Sn1Y5So37fSLX0R9vNeXx2yapce2iF7PIpyu?= =?us-ascii?Q?WZhgrClag3in/4kleprlRQXJrP2FAYonpWdmyo0LNZTbnocxaIaFs0neNiqH?= =?us-ascii?Q?D3NKu+30CXZLVBTMnSAC9DeW6ISIXHFWYubm+AXrqFkp4rJ2ZmroZuWVThIo?= =?us-ascii?Q?qRIv+ity9r6OHst0VGteh3u06FdJo13HAABIgJct3935F0IETIB+fs4EqiD1?= =?us-ascii?Q?yVKSKITWy9zipVltIOi5WR72FukRjTVmpB/cGiRZ9FOf54Dr8jPJd4hClgqE?= =?us-ascii?Q?7doIjm1TMZNbtACxzDVBuAFngFV+iSEJIPUjhqanF2KIpX9CFB70yKzAhZnG?= =?us-ascii?Q?bHqGEJzwtKdMvYtIg8k7fqfO0vX/pDw8o2PWdO5jkL00GldSejuaEbrFkWrj?= =?us-ascii?Q?FRvYWpUFdFk46b5WI1JZ0UAxCjk0NhHkHQczXGJKJGRf6bBADpEc/aEBDLov?= =?us-ascii?Q?klZjm/5iApBvd81zOfPzOGBJ6pYF1CYRMUGzf5YMrZnQGFlLkaPFOKpVS4kE?= =?us-ascii?Q?RRuNVWolx6R9ADF2gOXto9jXElnSbUKigsndx2rnI9YSife0nlK+01WTV9TP?= =?us-ascii?Q?KdCO/Evp/HKRzfrBTuOPKqTxWuhx7/X6aCNUgiBvBtECwqEcl04EEGoXP27I?= =?us-ascii?Q?txA/XdHxnDQfiOvlpmNGyATI/5pijk3s05xwN5QL3BqjXs7VVpzHVSZRE/kA?= =?us-ascii?Q?Ni0sk6V83zADlnVrNs09EvifMm898x1BUIgMpvncQW21BBtun+K02eGXJF8p?= =?us-ascii?Q?E5NYyiCFjtXp9Ro=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SI2PR06MB5140.apcprd06.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(376014)(7416014)(52116014)(38350700014)(921020);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?eVivhCDP7lDwNneoCT70Uy/jbLMq3ig/LXH5MyHiMAxMFUwOZiGmIlMECML0?= =?us-ascii?Q?jABe7OdXTWiZyf/B4TqTOguPnVg5FBaCnnSqyg7BhS2PjBQgswqlSCxenFAz?= =?us-ascii?Q?wvwfHksQZK1ELAeS3sCddore6Se54qftiNbFIgR0/yXVm/dzH+y99z94b510?= =?us-ascii?Q?iLuF/n0b8QEwA3PbI0UrOwDwA7vECzoVpfxk6RK+EYd/TuYo70CDmNPMia0Y?= =?us-ascii?Q?IvzlzzWX8adh0d6ZwEVZe6fqVL9NF0rZCX+ba7Zb+v9bKGzGwp9JPkfEI9ZA?= =?us-ascii?Q?tHt6tgVwNTiAsgSJPTvbL1Z15+m5euihH8FtjsikQtq97FwLTkRBgE25qcVb?= =?us-ascii?Q?wLtsdeVOjpuvIND4yLn/9JVMNV5pqVqjFH7kw7z8bkg18VLlI40FNMPuRaEw?= =?us-ascii?Q?6uSh5EL6qaRDL55NbD40pD5FYy4o3kBYC3hfi1OImrJbzux+4d7flNMzQYuy?= =?us-ascii?Q?1fNNQ61/6R5rhlAN+dswSoZoLX/Nl4XEmLh0j6d8B+I3c4zf3+WBgz6ZDJDR?= =?us-ascii?Q?yDyg+cIWvv2LZsR/d2XKqvpBMhIw9udOnJuC1IOH4YbYXuqOiFy8bzknWgZS?= =?us-ascii?Q?uGkV2hTsj4EUM6VG4fEy5qH4qiyLQWS3Go5GoB+ISLzLomNvQSUvanP6UwAg?= =?us-ascii?Q?se0JpgNVInW03lQ0EtPQe+UtioQEXwb3rfgd7I2LlKeMalimsrM5F2EjHlgN?= =?us-ascii?Q?qXXBOay210p63ExdSvKsac/fXzVR2xmm+0JHL3PM6JC5EgPXw4pgC4kLqVS6?= =?us-ascii?Q?rHDi8ciFkpb971RsezWQjLrj6bMcXbJ8YZ9/MayKp2ruMFccvPw3hI4PUrFO?= =?us-ascii?Q?DKwQLq+Lgf93GYcteIywumZhs2GPqth+ob09l4vJIMCz4g7vOlUgSgQ3RW6u?= =?us-ascii?Q?ZFxZxhoh0Ts/ZK7xkhXxeg9Q1ftlrY3QTy7CejPwgvV5IIiy5h4+RSUwnqHf?= =?us-ascii?Q?Vu3bpXFVN18dxzvQ2abLvnLMjahQxo8gg/rZ/x5CIOtzkszfdHJ58O0K/92z?= =?us-ascii?Q?i1M1o6ZkEgQe07wZPoKA13xDTPKJTkr/+XPiPnMZjpTM1Bw+8gNJolSO7wF2?= =?us-ascii?Q?G0/dbsskXtOECrWn/BB3mxc0aFXV0i35QzRCZqbdTrEyN0nukAEn08DjIABT?= =?us-ascii?Q?pAZByiNY+9DZhyfMhsfvnboDfWcEID+KSo0Q/xie+f6gLzdZJ5aUpeMEyqH6?= =?us-ascii?Q?0k9/BXNGUkTUuXwNzHHBCJtqvCEod6pvfIidspA123H4NY1r4wjuIadltRyn?= =?us-ascii?Q?hBZBFGHLOrN0NL88e8k5kTqVT1mKfQtCbsK0ROb3nnQ9N4sdakqTwj10ZXrn?= =?us-ascii?Q?He5ln/7bL9gCu39yM98/N4sLn5xJc45iQh6PHHD2MUhNv2oU2vzo94CuYBAt?= =?us-ascii?Q?rgWLklm2kEV2mkPvzoM+APnCTeURtRuoUnSRp5dWxj10SpTcbARGUM/46WR1?= =?us-ascii?Q?f9Ly8vFGTNmqnTqn7JqbgyMe4OOpXfviEOBKtfWR9CYzjxIftONBqN48+7/u?= =?us-ascii?Q?c+ervzm1OESKarmBrIQektDNPYCxCbyidhTfVV3Z0wVXNCSRgHS0pqpF1QXS?= =?us-ascii?Q?2w0GRSfRJXcr4mLH8moOXOxRmo5xVOy6s8jNF1UB?= X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7df98ef3-a18e-484a-374e-08dde0b87538 X-MS-Exchange-CrossTenant-AuthSource: SI2PR06MB5140.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Aug 2025 13:41:40.4504 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: dCBnNuOt+ZQS/FUCoxVuWAyfp61Lz9PnLCBsQajNMnAvYoQrTkg8y663Pgj2nHDy6/qF3k3jUhw7XXXGWkyUTA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYZPR06MB6215 Content-Type: text/plain; charset="utf-8" Use kcalloc() in main_func() to gain built-in overflow protection, making memory allocation safer when calculating allocation size compared to explicit multiplication. Signed-off-by: Qianfeng Rong --- kernel/rcu/refscale.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c index df646e0694a8..5840fac06feb 100644 --- a/kernel/rcu/refscale.c +++ b/kernel/rcu/refscale.c @@ -1021,7 +1021,7 @@ static int main_func(void *arg) set_user_nice(current, MAX_NICE); =20 VERBOSE_SCALEOUT("main_func task started"); - result_avg =3D kzalloc(nruns * sizeof(*result_avg), GFP_KERNEL); + result_avg =3D kcalloc(nruns, sizeof(*result_avg), GFP_KERNEL); buf =3D kzalloc(800 + 64, GFP_KERNEL); if (!result_avg || !buf) { SCALEOUT_ERRSTRING("out of memory"); --=20 2.34.1