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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70D9BC83F0A for ; Mon, 7 Jul 2025 05:29:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0DFD38D0002; Mon, 7 Jul 2025 01:29:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0193F8D0013; Mon, 7 Jul 2025 01:29:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C4DC68D000E; Mon, 7 Jul 2025 01:29:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 9E3168D000C for ; Mon, 7 Jul 2025 01:29:05 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 40FF2128437 for ; Mon, 7 Jul 2025 05:29:05 +0000 (UTC) X-FDA: 83636339850.17.9B2D649 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf17.hostedemail.com (Postfix) with ESMTP id B6EAE40002 for ; Mon, 7 Jul 2025 05:29:01 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=YKFh6QPe; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=DwYjp3OH; arc=pass ("microsoft.com:s=arcselector10001:i=1"); spf=pass (imf17.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; dmarc=pass (policy=reject) header.from=oracle.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1751866142; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=3TewVDIJx9Odr+Qd/YNQrIeKGDph0Hf+8m0KaT/I41Q=; b=0MZQmkMYHf3XJPegQrKip0TvrddAGFJB/OCyViS6rbSUY1JQ1wpEwrJ+eyuchW8zBqrjp3 T8bprAZcg9c36QUijfn56+jwViK7+fltxp125PgeMvVMVWUOWL95wnT7hkxHXVC8K8Lujw 7yyVszhkgX065xbDy06ngCe1GLgz0JY= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1751866142; a=rsa-sha256; cv=pass; b=MDqpC6zEYXxXEEcAKCsHPB/C3pTNU0Q1ZEDgmV64P2hs7HKNBNg43JqEb0EPhUJOfF2CHr qmcCOTrs6+mkkym7uhJ1zIRGonAvudGjANWQ+igxvyKGKtIAs9Og7sV7xDqKQFdGtds+SF M5iM8zeo7Wsc4OXKGUo5EhfMn00ChQM= ARC-Authentication-Results: i=2; imf17.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2025-04-25 header.b=YKFh6QPe; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=DwYjp3OH; arc=pass ("microsoft.com:s=arcselector10001:i=1"); spf=pass (imf17.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; dmarc=pass (policy=reject) header.from=oracle.com Received: from pps.filterd (m0246617.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 566LeUdx004231; Mon, 7 Jul 2025 05:28:57 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s= corp-2025-04-25; bh=3TewVDIJx9Odr+Qd/YNQrIeKGDph0Hf+8m0KaT/I41Q=; b= YKFh6QPeRI/1fbTFmE5DQQsVigvwnHrB+hrr5XtYhBeYE6xZpyAmZkPer8rSKcrz u5rOH9/F3vJumwfogy/PeH9ul8cKldTw56A+IpntTND/G05JcF5fkkqkQlsmKfDd EGdds76DwheQiiEDejeijlaka4skjIVBq/jeyl+b4zAk5OuoQ4ARhpDOp92zDhiF V6bVKn/t0Jn21IC8Kht1OX1V7DjiEimaMlcHeK1xql3uJhK8hd5/YVSWvDOy7oTc Jj+9YcRDcg4T1XbCWAiqzNvOw2R+FWPnvloGgZLkwCyLbvNpdOoWpPdv6nTAH9IR BpmoWDeuyJzW4IyHE0q11g== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 47pvkxsxyb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 07 Jul 2025 05:28:57 +0000 (GMT) Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5672PVBl024285; Mon, 7 Jul 2025 05:28:56 GMT Received: from nam04-bn8-obe.outbound.protection.outlook.com (mail-bn8nam04on2065.outbound.protection.outlook.com [40.107.100.65]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 47ptg82hd8-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 07 Jul 2025 05:28:56 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=uvEnCBHWcNybjX4axc/xgmXpyFBtbTgm32MX4C+hg1JMY3lFhthIwmii6Y0u8GVdci3IN3XrErq+tBpg5FKWdVPY2ssC/MXXz1s1febTdeqHTwPMwKF1lfFvcVb3EPDpRvuWr1NZX2jDKCRSCGKKX8YYo6iZMSzKP+egMwzxIYwQ6HwnrJdaU2eJO9/oO1uXdtIfwl4QYKX3ykw32AGPhZ3aG7KtBZtlyTFZhA58f0dTUZtE08kx/NqpA0XVxMNTS9HFkzA9Nz3yEmUlJnRasDLu3p0ADtp2bFW5Mm2GiwvTOVzYs9i8L55SMKxaFZKBSZ01d3hz/7VxPygBxE+KZQ== 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=3TewVDIJx9Odr+Qd/YNQrIeKGDph0Hf+8m0KaT/I41Q=; b=bDGp/mgUb1dEk6FsLZRIG1Q2JTgfwwdsI37+jSSV2Kj60K2i8iuf6UKMRsrCzppW2cYaddKowFvaFZnn1YYLaZl2nIUlO1mLvDpmpp6MYovULr3qYNNtrGm2zSNznWJaZLGODJfAEcev8iDT9reTCY7gFAXnbAvMCyZzLLFPuT1jPhdpHL4GMWIiXsdty2I7eo0vnC5EIiI/XaiXGeeFESrevhXgAcfn/7W/ldPs3pteoBbDSzQB8Y7hf0xxzJmi1zmsutRCeZfuLK3X4j/A5yTfrtiHs+eBXLY6SptQ5SnCBivkNJUgZ0bXgAyOoktWU6XKskCugAQ5doFuJ6jy8A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3TewVDIJx9Odr+Qd/YNQrIeKGDph0Hf+8m0KaT/I41Q=; b=DwYjp3OHuzsHCLoBIPAzDgxKRcoQGAwoSZbb7/LBCjaL6/UuFVI77YTP2CrrzX/I+cucfyLDt9AKBYSN0a5JspmuwMU/A0z8eX6xP5NBOqFt6Pp3PBAy0wMgjMGwABiqeVKt3LeK2ZSbvTn3OrYV9xZNe81aaQjFRZ960r5BlWE= Received: from DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::16) by DM3PPF00080FB4B.namprd10.prod.outlook.com (2603:10b6:f:fc00::c04) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8901.23; Mon, 7 Jul 2025 05:28:37 +0000 Received: from DM4PR10MB8218.namprd10.prod.outlook.com ([fe80::2650:55cf:2816:5f2]) by DM4PR10MB8218.namprd10.prod.outlook.com ([fe80::2650:55cf:2816:5f2%6]) with mapi id 15.20.8901.024; Mon, 7 Jul 2025 05:28:37 +0000 From: Lorenzo Stoakes To: Andrew Morton Cc: Peter Xu , Alexander Viro , Christian Brauner , Jan Kara , "Liam R . Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Rik van Riel , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 02/10] mm/mremap: refactor initial parameter sanity checks Date: Mon, 7 Jul 2025 06:27:45 +0100 Message-ID: X-Mailer: git-send-email 2.50.0 In-Reply-To: References: Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: LO0P265CA0013.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:355::8) To DM4PR10MB8218.namprd10.prod.outlook.com (2603:10b6:8:1cc::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR10MB8218:EE_|DM3PPF00080FB4B:EE_ X-MS-Office365-Filtering-Correlation-Id: 481e3df7-7a59-45de-cfde-08ddbd171fe5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?AzHKhl7olSHtjK4WpH5oGyfMjGQq75bSilHLp3WWw2brDSKnXIiikz785oxb?= =?us-ascii?Q?Rx+cXtldbnJz7d0yaqh/AuXvDjv1So+lotAMYXqwyy5/qMoF7OFqbmSe48ai?= =?us-ascii?Q?MJEqrVnrfIhES3fDOYA9MvNlxkaHDjcp1E6rD8LK9QXRT3tQC5sYf5MyoL4h?= =?us-ascii?Q?Ghvyky8wbxjdFIkl/0TkHodA3nmVyedA475aV2hTXdDVQLQzfIBlo3fwdm5g?= =?us-ascii?Q?HG1U7TjjBpy9vWTF361lVB4CJKFihETrk5HaW7d3OswQ939Nd/eWU9U3Wf39?= =?us-ascii?Q?Fm6yqopTSLF+vguEfEofiWU4GCgQLvtd5uNoYwrFQRVRx7JFp/suTBzM87mm?= =?us-ascii?Q?+YChrl7f6usRH57OCx+OetdqEwbt3Vi+xdkmZTncWwDidPHD7woY/+1nzk/L?= =?us-ascii?Q?99mUc/waS9UCSbyNabQ98hQQonI0KrkEHjBwqFP0wMHTxfy0amHYuT+ba0j+?= =?us-ascii?Q?hUZBLrsfqB4d2GdBX8IyzuLlZWubclb7KSwKZ281WdMQEbJ0jUrr6H33ZlK3?= =?us-ascii?Q?R/uUtu/B3J+IvRoH8EOThQXpW0wIJD5OucjtQd3/1aufTuo+ZmgNio9YWHiL?= =?us-ascii?Q?G41uKqD5nX6QIB/pBrJnEkCxTeLs9ruTRZLXKmsRXLEpCwUiHG4Oekfn2scb?= =?us-ascii?Q?w8zWnPuQ3QtbVmoNBcv7dckTrkf0BANVPRqe6ElQ3u5uoVFoMrjk8KFCMUJS?= =?us-ascii?Q?iKKnRx7/ZvVv0C/7u5Bq465xlCZ8Kbi+RIJUD+iaPgrQkNhwd5bURIcLWnz+?= =?us-ascii?Q?q6mDvWvrDv+BsHHD/EyPnMttCJF2Td0rIkBSM6THcubnNsTNh4YDTD5xLwgu?= =?us-ascii?Q?s7g1jehsZEUI6TvmcF+/NQx2SKK5pMSHaSEYgTk8QP6Wol1muD5ec+tNruLD?= =?us-ascii?Q?kHHreprZ/vscIJvO93YKGFBZuJivY9AZJJunafXg9oNVYoANMrS2fpHEcv3G?= =?us-ascii?Q?uSMkzfvgVSPmkSHIdLhqDwefilvHnHV8r3tBjOh92ETF3EQMSHuc3ua5Ltjc?= =?us-ascii?Q?6CbkxlQX5D4eAvvlkHAZ+iUcNImoD0YwOYu/YZl0LQbsA37LIQI2grH2gpJZ?= =?us-ascii?Q?Gw2APWAJRW1G04PiQ/4PiHpETkL3gR0h6Zbr4Qe6xD8BulWL9CnkLtIIqylF?= =?us-ascii?Q?zqiuQahu/nBeQDNWqp1R2HSpjHtRsQOZHGkE1lJfCHpg2rz2NvXXfP7GPzh3?= =?us-ascii?Q?ha83tbb6czki1FFQPIKfCPT3Y58O/xN8Zx0hmmrbttyOf6+A087Z5516jxLY?= =?us-ascii?Q?s/qeHUTC/CUjNX9KYHHN+UtXheIoMppHN/kijgL5jIbVp2WU0s8piWcsuJ2N?= =?us-ascii?Q?ku5Ho4sy/A3DpR+SDKESCouNZ5WMJsvJe7JAFpA8KJVbT2npL2lWXaIKeFAj?= =?us-ascii?Q?AkGdPBf4XDjwzGqe6Ss7R1fhMLRNsbKjOv5OOzIEGM1/sAIT3QxxkicZSoK1?= =?us-ascii?Q?TeHSZXucyyA=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR10MB8218.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(366016)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?c/iCMtlUHQLydpkxVKC6+EzXtaK0M5BLOUAEjeuAwDWN62ktfn9irUBCAr0i?= =?us-ascii?Q?tITao/cIEIceKMyRPl1s8tKZzyQpadTM+8Bm/EA2alMUlch1s1WgSq/Z0tEj?= =?us-ascii?Q?mWBIdgsnXVXaNeUUUvREHjSiIT8sw8OvFRFz0CBIHqrMB2ZvavjxAsUE7E2/?= =?us-ascii?Q?rwgyerBSRUEmreCLqJTAfxKBajh8SnGnvKX0b8xo091VyXBXgd/sRtbjWnmu?= =?us-ascii?Q?H0NmZiUz+/U2gdOAmDtwZCczZBspVr8rKTuudcM6kJ8gNyp3YcDcR+gsWDdm?= =?us-ascii?Q?gVsTY1OfEeO5sOXGFZ6PScR2qmuKiaAvWGHR3mBgkzZ5w7yUWj1PRRrrNq2c?= =?us-ascii?Q?NDhv/tc41SWsb/TICNUSDS1MjHkZJQsefFSFHI+zvvipJClUCJ9o4FMEguD5?= =?us-ascii?Q?N3iXlZvAL4mg5SNDH+M6KsfTaIc1fZTc/YeWOiBL3xMX43pdvgN84+jeHw0h?= =?us-ascii?Q?730QjKrIORWZwB0xAaaUyCp7kyV4NKynd10Np7MEl4dc6cz3osiU1NNkyzlY?= =?us-ascii?Q?SQL6GoOPOeA2WdJnU7mA3dsq0SP/8leF0seI+YJjNw21WZ0BZTleAn73IdWp?= =?us-ascii?Q?2E0WAIt6RjZyzHoMa8SPA4ZYslJoHMTFLDiIoW4NojJoHR5q+xVrX12usUbp?= =?us-ascii?Q?Chrhm66Rmyj/3NxSmpIXyDZXVP0RROT0L7ljuVlhhmNFN6c0SULjtHnm3q50?= =?us-ascii?Q?h1AEnxUckGm5n4wKyhrMbyMzhW3TbeHzrE6lmrWq7dtKK6bAgpMrG4xPmlpx?= =?us-ascii?Q?p1j0s5/JM+RtJh/hLMhssOWcnUahs5SrNx2V5CWMij247feAAV5ihVoaQa1Z?= =?us-ascii?Q?nppgOHRXXpI/FvF058fTGHG11JkfkX2CwYzVRBuxKw473Rp/Yw71Bio7lGzb?= =?us-ascii?Q?kw12y3K9Jt1z2Zxl3VRgYlPqFgHwZ71HuD5V19hc4ETzcexpZunRyzIupaG3?= =?us-ascii?Q?Zta2d65+sUoE9jbhkU1aKPQvdVlkZMiWTqLZyZigneo5PBzD6fdfqf1t6qhx?= =?us-ascii?Q?mwDb3+LeRGRsEzKaqj5dIUyinvukhLnWEU4ucaS2LAk+ek/aooOcQ7Quzzec?= =?us-ascii?Q?lRhs54Z7B1+62M+j8DZdzMc9yR2szcJ0Fz8xjLNh8HDopCAY/oexQnZzhVOK?= =?us-ascii?Q?kYKwKYluOKCPVHze/UEUKbm4gBLM+Vi1nG4Ecpwf0iqkE2IiIm1dBKqfAT17?= =?us-ascii?Q?rjN0KShUZYXg39bzVu8m9wi5A78ULk/zmmTSHCtQZ2Ia82Q+Bg6KY1kyTccy?= =?us-ascii?Q?Gyiqibod3wx5+RFMacrYBvJXeJXgVY1uIATIOMtOEhykOKR6fBy8GqaNc/LI?= =?us-ascii?Q?G6JtQuY/DLey2ql/7CZdZHekS2Y/vYOWvLtX6pE7XEyinu5cJeO4g9DC+iKO?= =?us-ascii?Q?v7UP3LOxCRXsbHZUJD6A9rWdHedAEyuA1VEkqxN1nhLkSBMA47venLIGhYW7?= =?us-ascii?Q?oFFWGPgMfgjBW0Pj4JUg7SnIabz+o6A7J2j/leMGkGRaONb4iy3isuf2akfq?= =?us-ascii?Q?D3rWoa1lVD3yxSt3k2eivqZe+h8F1bZm0o55tUPRyBvvWjkXnzQ7uTUrl7Jb?= =?us-ascii?Q?PcNWzbiEUFmw0jJ00rdzwDL8bV0dcnHMs/osFnQKongyhjgD2jWke83DlMKm?= =?us-ascii?Q?dA=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 481e3df7-7a59-45de-cfde-08ddbd171fe5 X-MS-Exchange-CrossTenant-AuthSource: DM4PR10MB8218.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jul 2025 05:28:37.4020 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: CrlLNlkp4I6iT6djH3pJBCWq5jhiO91FbT3ZYnyy4uoOfpv7pnf6PzhkS8ZXyTFFeKxal2KsdMjfeCwfVc3gKHRpt0yJKuyvheFgGlJwPOg= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3PPF00080FB4B X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-04_07,2025-07-06_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 bulkscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2505160000 definitions=main-2507070030 X-Proofpoint-GUID: i3XewSEmKg3Z8ISez95ih8h8KdkMhjRr X-Authority-Analysis: v=2.4 cv=a5Uw9VSF c=1 sm=1 tr=0 ts=686b5b19 b=1 cx=c_pps a=WeWmnZmh0fydH62SvGsd2A==:117 a=WeWmnZmh0fydH62SvGsd2A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=Wb1JkmetP80A:10 a=GoEa3M9JfhUA:10 a=yPCof4ZbAAAA:8 a=44BLHjD3IfhdABlFFWYA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzA3MDAyOSBTYWx0ZWRfX0lv4KWjap5sY 7C3GCLdPvoC8n2XfA9cg+YKdIdBDT9t6aFEQM+da5umPye5hX9LJhhnb4pgx8fT4SKKwQuJxkfj CngOdYfi8QOHbt7o1CMp4JYVFWjFR9yALxehUfWl/Hh8v13MhYaNbZuHU7A2w7yFtSSkqbKkyiu eZAHwJdM8w/YK+HOuyYg0N75KEOKaqzProoPuRG1LBqnjkNgTRZ25LKHOLIQl3LNwNxxBWRGGN5 //1sJGGznjNAUwASmIpVJgyhFBybkUuThIhRp4fXFNA9CDfghCyXvec6CPD5gHx8rnO3SdWmDnp 3B284GDflADucMFJv9/0pJ6pSMFn3+Cs4jZPs2Yn/3wGMvPOXqDeaDcXLuaM+8D9WQbR2vwRfp9 esoAoJbfh2tYVQSv4LnUtQMuSL2/BoS7MO2UQxW4r8GpIwSMrsGLfXk86PgtREHm6fPADggv X-Proofpoint-ORIG-GUID: i3XewSEmKg3Z8ISez95ih8h8KdkMhjRr X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B6EAE40002 X-Stat-Signature: 3p3kfx5wtk7b1ecxx9qtuko9pwt44hss X-HE-Tag: 1751866141-163344 X-HE-Meta: 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 xvWPJvhH 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: We are currently checking some things later, and some things immediately. Aggregate the checks and avoid ones that need not be made. Simplify things by aligning lengths immediately. Defer setting the delta parameter until later, which removes some duplicate code in the hugetlb case. We can safely perform the checks moved from mremap_to() to check_mremap_params() because: * If we set a new address via vrm_set_new_addr(), then this is guaranteed to not overlap nor to position the new VMA past TASK_SIZE, so there's no need to check these later. * We can simply page align lengths immediately. We do not need to check for overlap nor TASK_SIZE sanity after hugetlb alignment as this asserts addresses are huge-aligned, then huge-aligns lengths, rounding down. This means any existing overlap would have already been caught. Moving things around like this lays the groundwork for subsequent changes to permit operations on batches of VMAs. No functional change intended. Signed-off-by: Lorenzo Stoakes --- mm/mremap.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/mm/mremap.c b/mm/mremap.c index 65c7f29b6116..9ce20c238ffd 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -1413,14 +1413,6 @@ static unsigned long mremap_to(struct vma_remap_struct *vrm) struct mm_struct *mm = current->mm; unsigned long err; - /* Is the new length or address silly? */ - if (vrm->new_len > TASK_SIZE || - vrm->new_addr > TASK_SIZE - vrm->new_len) - return -EINVAL; - - if (vrm_overlaps(vrm)) - return -EINVAL; - if (vrm->flags & MREMAP_FIXED) { /* * In mremap_to(). @@ -1525,7 +1517,12 @@ static unsigned long check_mremap_params(struct vma_remap_struct *vrm) * for DOS-emu "duplicate shm area" thing. But * a zero new-len is nonsensical. */ - if (!PAGE_ALIGN(vrm->new_len)) + if (!vrm->new_len) + return -EINVAL; + + /* Is the new length or address silly? */ + if (vrm->new_len > TASK_SIZE || + vrm->new_addr > TASK_SIZE - vrm->new_len) return -EINVAL; /* Remainder of checks are for cases with specific new_addr. */ @@ -1544,6 +1541,10 @@ static unsigned long check_mremap_params(struct vma_remap_struct *vrm) if (flags & MREMAP_DONTUNMAP && vrm->old_len != vrm->new_len) return -EINVAL; + /* Target VMA must not overlap source VMA. */ + if (vrm_overlaps(vrm)) + return -EINVAL; + /* * move_vma() need us to stay 4 maps below the threshold, otherwise * it will bail out at the very beginning. @@ -1620,8 +1621,6 @@ static bool align_hugetlb(struct vma_remap_struct *vrm) if (vrm->new_len > vrm->old_len) return false; - vrm_set_delta(vrm); - return true; } @@ -1721,14 +1720,13 @@ static unsigned long do_mremap(struct vma_remap_struct *vrm) struct vm_area_struct *vma; unsigned long res; + vrm->old_len = PAGE_ALIGN(vrm->old_len); + vrm->new_len = PAGE_ALIGN(vrm->new_len); + res = check_mremap_params(vrm); if (res) return res; - vrm->old_len = PAGE_ALIGN(vrm->old_len); - vrm->new_len = PAGE_ALIGN(vrm->new_len); - vrm_set_delta(vrm); - if (mmap_write_lock_killable(mm)) return -EINTR; vrm->mmap_locked = true; @@ -1751,6 +1749,7 @@ static unsigned long do_mremap(struct vma_remap_struct *vrm) goto out; } + vrm_set_delta(vrm); vrm->remap_type = vrm_remap_type(vrm); /* Actually execute mremap. */ -- 2.50.0