Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Nageswara R Sastry <nasastry@in.ibm.com>
To:     Stefan Berger <stefanb@linux.ibm.com>,
        "kexec@lists.infradead.org" <kexec@lists.infradead.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        "linux-integrity@vger.kernel.org" <linux-integrity@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
CC:     "nayna@linux.ibm.com" <nayna@linux.ibm.com>,
        "mpe@ellerman.id.au" <mpe@ellerman.id.au>,
        Vaibhav Jain <vaibhav@linux.ibm.com>,
        Frank Rowand <frowand.list@gmail.com>,
        Prakhar Srivastava <prsriva@linux.microsoft.com>,
        Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
        Thiago Jung Bauermann <bauerman@linux.ibm.com>,
        Rob Herring <robh@kernel.org>,
        Ritesh Harjani <ritesh.list@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v6 1/6] of: check previous kernel's ima-kexec-buffer
 against memory bounds
Thread-Topic: [PATCH v6 1/6] of: check previous kernel's ima-kexec-buffer
 against memory bounds
Thread-Index: AQHYkiXjWJEZuDUJsU+IRCFzgEiaGq2HWCz2
Date:   Wed, 20 Jul 2022 13:41:47 +0000
Message-ID: <MWHPR15MB11506BA4D2AE5E3F5B4D608CEB8E9@MWHPR15MB1150.namprd15.prod.outlook.com>
References: <20220707172026.831614-1-stefanb@linux.ibm.com>
 <20220707172026.831614-2-stefanb@linux.ibm.com>
In-Reply-To: <20220707172026.831614-2-stefanb@linux.ibm.com>
Accept-Language: en-GB, en-US
Content-Language: en-GB
msip_labels: 
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 577a60fb-84ae-4274-1e13-08da6a5597a8
x-ms-traffictypediagnostic: BYAPR15MB3175:EE_
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:MWHPR15MB1150.namprd15.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(396003)(366004)(346002)(376002)(136003)(39860400002)(41300700001)(71200400001)(2906002)(4744005)(86362001)(52536014)(38070700005)(478600001)(7416002)(8936002)(5660300002)(122000001)(38100700002)(966005)(186003)(33656002)(110136005)(91956017)(316002)(54906003)(26005)(53546011)(55236004)(66946007)(6506007)(8676002)(66446008)(64756008)(4326008)(66556008)(66476007)(76116006)(83380400001)(9686003)(55016003)(7696005);DIR:OUT;SFP:1101;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?BKBfC6HDGP6mstRdWJVNA0Bvz6ml2WIY/craY4Od6k2x1dPg4cyTLi+uXT?=
 =?iso-8859-1?Q?iK/F7e6t8GsA3chyOP6CRjWuIv5gBkP8moSrby82ODa4bjL5hhAWX39Mv4?=
 =?iso-8859-1?Q?UBqGltrohR9hwqkWCtU8V7rnWhhR0yFrwkJUVC2jhYIWmNDATea+Q9DcYK?=
 =?iso-8859-1?Q?jL8PNL1fwWS0T+udfwyxXl2PC1kc/VT32HG3LN1IHFE91S4CN+e6tec954?=
 =?iso-8859-1?Q?SbF5MawSA65417wPvjYpMiZZyWHATHAR/bsdGkMApowZ3fZWhg8Eg5aKiV?=
 =?iso-8859-1?Q?Pu2zRi5mwfBwq2cJa0wiSy1iFOeTO8O+HJbcCSnf9F/09vPWuecHpddpZO?=
 =?iso-8859-1?Q?KUayiOZPqWDvW7jg8HfxRllGIGbQuN8Z0XQ2YQksYJCNNhsQ1iXOhspVYs?=
 =?iso-8859-1?Q?qtOozvdoqxyPdIe9/Lq7hwmlDu0sb00j4HSGlKv+UAWObcF1CziEvfoZ65?=
 =?iso-8859-1?Q?QqAhR1gv2G2v4lvT3RHIUyLIEaoBJHnYEN4EddttYoXBrl3vBvzzmHIVsU?=
 =?iso-8859-1?Q?CefETNnN+NHGFBOp1KCnXnWIn+WlcU+qgQrplKfzx8+7oFy7E0eqoB9lzv?=
 =?iso-8859-1?Q?C6iK/QZjTbeUfO1UkrctYCU+tQzohpWBerq1N2o7UlOyMipcIiMXGhDqG0?=
 =?iso-8859-1?Q?FtVbsk1km6wDZooFqTCETSgLfudHYCOH4mvuq67+oEuOz7luJ337y28OBZ?=
 =?iso-8859-1?Q?PRdxsQS49JeR2D4QTULxiwmB/2cyk2dadc578+GxPK+O/v6fWd2K0bdhmS?=
 =?iso-8859-1?Q?cWg4GjMwl7gAb5v/OEc6QtDriscenCkvgGf3WYUP+o8F6RwTnSEAFwNG1H?=
 =?iso-8859-1?Q?/+Cw/v2bQScvdvEsF7gdiEJt56fss14ZhayQnk2GHG6b+a2q89aoPqkvdy?=
 =?iso-8859-1?Q?J4kVONkwYzzvkDuwEbidjcIFK501PxpEJcw1/gSBlybkz1rtc7Dn8OIB4x?=
 =?iso-8859-1?Q?O3QUb3rwqt1wMoB8gcQOfPROGNtJzdkGxUTyXDNLPcKCNlwOwnydMCEb++?=
 =?iso-8859-1?Q?AbKUkB8KtJe//PhiOZGmYGe/+ehYm2o3tx4nxILG8iGuIRFloocEYYUlDW?=
 =?iso-8859-1?Q?GktcISjizdKoS5kpqP+MpftIBSowqQxfPsUOaH1ZAk8XdC7fS5w7JRbmpH?=
 =?iso-8859-1?Q?so8q2v+uI1a6covtMptujki9hRZlLQJraLYLQ4zRV1xN7lUEcB/letUuHz?=
 =?iso-8859-1?Q?iHCI/SE8NvruMTvJ6VxehTatDAuYDU5Q3lQRK0VA6HD30HsyDpZKFukBJg?=
 =?iso-8859-1?Q?YL0FnLBAIH3imB1ZyW6Omi9xkKUCxbJ4lUSjTwghjuAjGiGmkxyfH/30cv?=
 =?iso-8859-1?Q?N5Ka7tKD1pCKgwqcx3pCHz1Zaoue1LnpKgAfdeLD1QOHZfn3AsJNhL+gjB?=
 =?iso-8859-1?Q?f0LoMesFV2NED2w+6Ukh8l4bweIscjD+I8IPdhH1Ze6YAm3ehCCIo6iUNu?=
 =?iso-8859-1?Q?SNmDg+2AAXv3Wurm9qs3yH/EF932EXVkKUUA1VD5pDDu8fzFDmcoLJaWuP?=
 =?iso-8859-1?Q?lgcjCkjLoB7PQK4ezNTRUicG7QG6xoGa3R3pJftJZI536FV1LLuJwTRXTy?=
 =?iso-8859-1?Q?BxnQfWlJpNMTEodGxS0/A7IhXWbHDvkL8sfyZlBdmS5c4e2OKzcZmIIyI2?=
 =?iso-8859-1?Q?JcPaOJy2AHLNTMTJOXnS3ELGDdBQPxXSlr?=
Content-Type: text/plain; charset="iso-8859-1"
X-OriginatorOrg: in.ibm.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: MWHPR15MB1150.namprd15.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 577a60fb-84ae-4274-1e13-08da6a5597a8
X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Jul 2022 13:41:47.5332
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: fcf67057-50c9-4ad4-98f3-ffca64add9e9
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: dUf+FJ0km9khTXK6BmuVe1GijAC1ACQjQw6bZxIjaAp+UFb2PQ5S3QFsEJyty0Qk8M+PqC+UzgGst2niAKzo6A==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR15MB3175
X-Proofpoint-GUID: H5xuyK7f5NT5RTWAoT7E-BZUMi5-Nt44
X-Proofpoint-ORIG-GUID: xkkELs9ZHme4F-PHSqiZfyZJboTOXc7B
Content-Transfer-Encoding: quoted-printable
X-Proofpoint-UnRewURL: 0 URL was un-rewritten
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=baseguard
 engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1
 definitions=2022-07-20_07,2022-07-20_01,2022-06-22_01
X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=932 spamscore=0
 malwarescore=0 priorityscore=1501 impostorscore=0 suspectscore=0
 adultscore=0 clxscore=1011 phishscore=0 bulkscore=0 mlxscore=0
 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1
 engine=8.12.0-2206140000 definitions=main-2207200056
X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


________________________________________
> From: Stefan Berger <stefanb@linux.ibm.com>
> Sent: 07 July 2022 10:50 PM
> To: kexec@lists.infradead.org; devicetree@vger.kernel.org; linux-integrit=
y@vger.kernel.org; linux-kernel@vger.kernel.org; linuxppc-dev@lists.ozlabs.=
org
> Cc: nayna@linux.ibm.com; Nageswara R Sastry; mpe@ellerman.id.au; Vaibhav =
Jain; Frank Rowand; Prakhar Srivastava; Lakshmi Ramasubramanian; Thiago Jun=
g Bauermann; Rob Herring; Ritesh Harjani; Robin Murphy
> Subject: [PATCH v6 1/6] of: check previous kernel's ima-kexec-buffer agai=
nst memory bounds

> From: Vaibhav Jain <vaibhav@linux.ibm.com>

...

> Fixes: 467d27824920 ("powerpc: ima: get the kexec buffer passed by the pr=
evious kernel")
> Cc: Frank Rowand <frowand.list@gmail.com>
> Cc: Prakhar Srivastava <prsriva@linux.microsoft.com>
> Cc: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
> Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Ritesh Harjani <ritesh.list@gmail.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
> Signed-off-by: Rob Herring <robh@kernel.org>
> Link: https://lore.kernel.org/r/20220531041446.3334259-1-vaibhav@linux.ib=
m.com
> ---

Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>=