From nobody Wed Apr 13 13:55:20 2022 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id B2E2C1AF0BD3 for ; Wed, 13 Apr 2022 13:55:28 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from CAN01-QB1-obe.outbound.protection.outlook.com (mail-eopbgr660046.outbound.protection.outlook.com [40.107.66.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "DigiCert Cloud Services CA-1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Kdkcv5Lc9z4W2d for ; Wed, 13 Apr 2022 13:55:27 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=m7WWjNb2E8XFtjd7XoaBWHja/fIwoEGSgR/8J4W1AFTxA39IRn1XLEAbA0altt7QbAAkQAimCWqRmNyGob+pkJsSowG5g/kp0Ro+Vp0UIQp76H7+3eleZte276pqNrTwVO/AwVehq/twBT4GQMludMaEzOSkIJDG225K9pXiahsUU0BLzxwVG5ojV8s1wB1NaV0+1mfJbnzx5e96IomwIYXc59kKkvKEDMfLyQiAl2e1xZiaWe25Vx7w4FGrcj679TKdl0eereVreHummUsGV5Ce5RrnqPYN7oiHuAE3rTD00IB3R0R0Wp33TxA07zMQ3n8DbosUhURUXo4766FtAg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=iogXiI1/IJYxDtpKD3Hl2aUus5h6+kpj0kI0AswNaEo=; b=RINHy0I5a5oISB2XY6VOgRHX5msGz/MNmAj80wuJHveMV8ZlLK/4kb540XZ/xwmZcX7cLU9LHcOaLDhMsMP8KfeUNU762uIfK9h9tebJ9ykNeZGUv949hJYQmuPeaKqBYqj32pLaHG4Bq1ELIEh6Rzcmdpvu0g9mfaQwJpMiwMcn4msJZHF/6i3Iv0RiiaCrL51VwA0G6ulbmzDvUzmm33E2hTONNBlbrF9QMo1VzBJRmhK+KDfrkuen2ityuPcFmSjzqwz0wc132DQG1BHGxqsR9kMGLBh1o3hv7+3ewfmsKcXnd6aZbjnqp/9LbY6C7M55p/DrzK01XLC2RHNqkg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=uoguelph.ca; dmarc=pass action=none header.from=uoguelph.ca; dkim=pass header.d=uoguelph.ca; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uoguelph.ca; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=iogXiI1/IJYxDtpKD3Hl2aUus5h6+kpj0kI0AswNaEo=; b=eXfwp4sFxUxhRQmGhbIlkZNanB5Dn0cWxbOeASaUs+xkSiNlUQ8u0kbY9hBVL6i9fnJU7/UTpVsgCQR27k6tHO+HaRt16q61rmqIz2YhmLM4kvARhI6wqETqD1HaFY7kIttANpfCa4omOhbrjRnG3/OMIpR/9qWzZIs824IWn9FwQcuJOSChijRE9PHVjLDcJNC3prAg5ZjA0LPCYHfIKU64TwjwlGY1OjD6Duz3sJTs0EfXl7ab2DwkEYOQHv9KAddDQ6pgcudaVcK28MiJoNUNCwUJ8I35hw4+fTqbLnTMReVLKhtDam37eqw+a7GhHGf4y3K0+rcGAmBYkDyRAw== Received: from YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:de::14) by YT3PR01MB5392.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:64::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5144.29; Wed, 13 Apr 2022 13:55:21 +0000 Received: from YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM ([fe80::fdb1:ada8:7af0:3003]) by YT2PR01MB9730.CANPRD01.PROD.OUTLOOK.COM ([fe80::fdb1:ada8:7af0:3003%7]) with mapi id 15.20.5144.030; Wed, 13 Apr 2022 13:55:21 +0000 From: Rick Macklem To: Ronald Klop , freebsd-current Subject: Re: Sanity limit for length of user/group names? Thread-Topic: Sanity limit for length of user/group names? 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MIME_TRACE(0.00)[0:+]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:8075, ipnet:40.104.0.0/14, country:US]; RCVD_TLS_LAST(0.00)[]; RWL_MAILSPIKE_POSSIBLE(0.00)[40.107.66.46:from] X-ThisMailContainsUnwantedMimeParts: N Ronald Klop wrote:=0A= > Hi,=0A= >=0A= > A google search gives me this page: https://forums.freebsd.org/threads/us= ername-length-16.28189/ .=0A= > It talks about MAXLOGNAME and limits in utmp.=0A= Yep, I had forgotten about that one.=0A= However, it is very small (and can be increased for a build) and I think it= only applies=0A= to user names and not group names.=0A= =0A= When I look in getgrent.c, the only limit I see is for the entire "struct g= roup", which is=0A= GRP_STORAGE_MAX, set to 1Mbyte. (1Mbyte seems larger than I would want to s= et=0A= the sanity limit to.)=0A= I'll experiment with a long group name and see what happens, at least for t= he local=0A= /etc/group file case.=0A= =0A= Thanks, rick=0A= =0A= Regards,=0A= Ronald=0A= =0A= =0A= Van: Rick Macklem =0A= Datum: 13 april 2022 03:08=0A= Aan: freebsd-current =0A= Onderwerp: Sanity limit for length of user/group names?=0A= =0A= Hi,=0A= =0A= The NFSv4 RFCs do not specify an upper limit for the length=0A= of a user or group (called Owner/Owner_group in NFSv4) string.=0A= =0A= However, PR#260546 notes that a sanity upper limit for their=0A= length is needed.=0A= =0A= Is there any constant in FreeBSD that defines the upper limit for=0A= the length of a user or group name?=0A= (I can find the maximum length of a hostname and I think that can=0A= be used as a safe upper limit for a domain name, as well. The Owner/=0A= Owner_group names include "@domain" on them.)=0A= =0A= Thanks for any help with this, rick=0A= =0A= ________________________________=0A= =0A= =0A= =0A=