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Peter Anvin" , "x86@kernel.org" , "linux-hyperv@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] hyperv: a potential NULL pointer dereference Thread-Topic: [PATCH] hyperv: a potential NULL pointer dereference Thread-Index: AQHU2ilZRp8CWZZ0pke1kYNV+eQu/KYLMX6wgAknVgCAAEhA4A== Date: Wed, 20 Mar 2019 14:40:28 +0000 Message-ID: References: <20190314054651.1315-1-kjlu@umn.edu> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [2601:600:a280:9:8d7e:908d:9a9b:f0dc] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: b4086ac7-839b-4fbd-b848-08d6ad41ff44 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0134; x-ms-traffictypediagnostic: CY4PR21MB0134: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1360; x-forefront-prvs: 098291215C x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(396003)(346002)(366004)(136003)(376002)(39860400002)(199004)(189003)(13464003)(22452003)(446003)(71190400001)(55016002)(86362001)(4326008)(86612001)(71200400001)(25786009)(76176011)(229853002)(99286004)(9686003)(256004)(7416002)(68736007)(10290500003)(6916009)(5660300002)(53936002)(11346002)(7696005)(6246003)(46003)(52536014)(8936002)(6116002)(316002)(476003)(486006)(97736004)(6436002)(7736002)(74316002)(186003)(305945005)(8990500004)(8676002)(33656002)(106356001)(54906003)(81156014)(53546011)(81166006)(2906002)(6506007)(478600001)(105586002)(6346003)(10090500001)(102836004)(14454004);DIR:OUT;SFP:1102;SCL:1;SRVR:CY4PR21MB0134;H:CY4PR21MB0773.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=kys@microsoft.com; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: Rs/PG8kipgae9d8cIloWQsf7UESpXH31GD7EsIYflY7gxYa6L8NfjXKlip3f8PNitZQBJYV77+qhqSEsJAmJy7+b54o31DTgPaFtkuvKWAeBCcvIef9Xjj7BSJ0vM+gvqaVCyxJlwVTOuVw1UP/l/cIJQKq3syfxmL8dEVFjgbl5MJRSdwj7iB/ea3RLEgz5IKamC3H+GN7hHVvMR3KVERbtTZ1q4ImRrh9IdBmr3aDfObB7h2+PxzOJnwWuwwOzGzqH8LoK5CpYwSHWRlx0kpdluAc6IfYNF3CCKRD3R5Trr7EBPeFPAtyTWV842RM6tsqOYXhCzja5ndaJrHtAz4nppUDDG4g6Vg4GFo2qFz6Ui/OmmXATZJyfHw5Oky/T3E0/a0dCHE2QDm7KyKi5SJv0Gu3UfItBaFsaoMFVMaQ= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: b4086ac7-839b-4fbd-b848-08d6ad41ff44 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Mar 2019 14:40:28.5365 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0134 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Thomas Gleixner > Sent: Wednesday, March 20, 2019 3:21 AM > To: KY Srinivasan > Cc: Kangjie Lu ; pakki001@umn.edu; Haiyang Zhang > ; Stephen Hemminger > ; Sasha Levin ; Ingo Molnar > ; Borislav Petkov ; H. Peter Anvin > ; x86@kernel.org; linux-hyperv@vger.kernel.org; linux- > kernel@vger.kernel.org > Subject: RE: [PATCH] hyperv: a potential NULL pointer dereference >=20 > On Thu, 14 Mar 2019, KY Srinivasan wrote: > > > -----Original Message----- > > > From: Kangjie Lu > > > Sent: Wednesday, March 13, 2019 10:47 PM > > > To: kjlu@umn.edu > > > Cc: pakki001@umn.edu; KY Srinivasan ; Haiyang > Zhang > > > ; Stephen Hemminger > > > ; Sasha Levin ; Thomas > > > Gleixner ; Ingo Molnar ; > Borislav > > > Petkov ; H. Peter Anvin ; > x86@kernel.org; > > > linux-hyperv@vger.kernel.org; linux-kernel@vger.kernel.org > > > Subject: [PATCH] hyperv: a potential NULL pointer dereference > > > > > > In case alloc_page, the fix returns -ENOMEM to avoid the potential > > > NULL pointer dereference. > > > > > Thanks. > > > > > Signed-off-by: Kangjie Lu > > Signed-off-by: K. Y. Srinivasan >=20 > Did you mean: Reviewed-by or Acked-by? Sorry, I meant Acked-by. K. Y >=20 > You cannot sign off on a patch from > someone else which you are not picking up and transporting it further. >=20 > Thanks, >=20 > tglx