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Bruce Fields" , Sasha Levin Subject: [PATCH AUTOSEL for 4.4 22/35] nfsd: check for use of the closed special stateid Thread-Topic: [PATCH AUTOSEL for 4.4 22/35] nfsd: check for use of the closed special stateid Thread-Index: AQHTlMowhGWOkWssJk+opUPkYTtMEg== Date: Wed, 24 Jan 2018 04:17:03 +0000 Message-ID: <20180124041645.32420-22-alexander.levin@microsoft.com> References: <20180124041645.32420-1-alexander.levin@microsoft.com> In-Reply-To: <20180124041645.32420-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0998;7:muWKGhv9eXvI/yNSAH3JMUtta/UfYlZDkp/fGfxDAniH1PMbXj1cEkoaS9E0WFt8IxgjZIyWBQcfE3ZhezPexR8ZW5TJXXnxt9q/blj0tGCY/DqQpEydUkunlItHhe5U7S1VFJKjFNID4gquSBz9thUJhAy/4r6SKjj7TnO0zwD5DSL3xV1rOxlngriQb4xpWuiAv6i8yw44BsxF59BlHDmuSisADD3FLQawq8ZyBZFg+EUivCwtv/Ev0N4BjV77 x-ms-office365-filtering-correlation-id: cb890201-8089-4fa9-b5af-08d562e1a64e x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(2017052603307)(7193020);SRVR:DM5PR2101MB0998; x-ms-traffictypediagnostic: DM5PR2101MB0998: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(61425038)(6040501)(2401047)(5005006)(8121501046)(3002001)(10201501046)(3231046)(2400081)(944501161)(93006095)(93001095)(6055026)(61426038)(61427038)(6041288)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(20161123560045)(20161123558120)(20161123562045)(6072148)(201708071742011);SRVR:DM5PR2101MB0998;BCL:0;PCL:0;RULEID:;SRVR:DM5PR2101MB0998; x-forefront-prvs: 056297E276 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(366004)(39380400002)(346002)(39860400002)(396003)(376002)(199004)(189003)(14454004)(3660700001)(6346003)(10290500003)(105586002)(66066001)(6506007)(8676002)(22452003)(86612001)(54906003)(10090500001)(81166006)(81156014)(76176011)(110136005)(86362001)(68736007)(106356001)(59450400001)(8936002)(3280700002)(36756003)(25786009)(107886003)(2501003)(6666003)(99286004)(2906002)(26005)(2950100002)(72206003)(102836004)(305945005)(6116002)(3846002)(5660300001)(4326008)(478600001)(316002)(53936002)(97736004)(575784001)(2900100001)(5250100002)(6512007)(6436002)(6486002)(1076002)(7736002)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR2101MB0998;H:DM5PR2101MB1032.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;LANG:en; authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: VLuqm/fjXYHMzKpu3QxhHNzjO0rgQkXT6tJXRJ6cKwUMIDoruFqdPPDjXUt2PbBPiFLZANmWjZGNVpX2xDDUAA== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: cb890201-8089-4fa9-b5af-08d562e1a64e X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Jan 2018 04:17:03.7593 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0998 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Andrew Elble [ Upstream commit ae254dac721d44c0bfebe2795df87459e2e88219 ] Prevent the use of the closed (invalid) special stateid by clients. Signed-off-by: Andrew Elble Signed-off-by: J. Bruce Fields Signed-off-by: Sasha Levin --- fs/nfsd/nfs4state.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 1b05769f18cf..dddf8fd3d058 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -72,6 +72,7 @@ static u64 current_sessionid =3D 1; #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(st= ateid_t))) #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(sta= teid_t))) #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, size= of(stateid_t))) +#define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof= (stateid_t))) =20 /* forward declarations */ static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *l= owner); @@ -4704,7 +4705,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_clie= nt *cl, stateid_t *stateid) struct nfs4_stid *s; __be32 status =3D nfserr_bad_stateid; =20 - if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) + if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || + CLOSE_STATEID(stateid)) return status; /* Client debugging aid. */ if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { @@ -4762,7 +4764,8 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cst= ate, else if (typemask & NFS4_DELEG_STID) typemask |=3D NFS4_REVOKED_DELEG_STID; =20 - if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) + if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || + CLOSE_STATEID(stateid)) return nfserr_bad_stateid; status =3D lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); if (status =3D=3D nfserr_stale_clientid) { --=20 2.11.0