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;
Date:   Wed, 9 Aug 2023 16:10:59 +0200
From:   Stephan Wurm <stephan.wurm@a-eberle.de>
To:     hch <hch@lst.de>
Cc:     Richard Weinberger <richard@nod.at>,
        linux-block <linux-block@vger.kernel.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-mtd <linux-mtd@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Johannes Eigner <johannes.eigner@a-eberle.de>
Subject: Re: ubiblock: null pointer dereference using scatterlist in
 work_queue
Message-ID: <ZNOec8JmndA63Mnh@PC-LX-Wurm>
References: <ZLT2qEYjaWgSpRD6@PC-LX-Wurm>
 <1293911429.1782934.1691445776353.JavaMail.zimbra@nod.at>
 <20230809135308.GA32214@lst.de>
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <20230809135308.GA32214@lst.de>
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?Sm5DRHluQ2pBb3RUeGwvMEJrV3JnYWhTSnRrc2E0MjBnaHo3KzVUUGV0ME9l?=
 =?utf-8?B?N2hRbXhLeVRKT29JT2NlKzM0UmFDeDZ0L2J4U0c2T0lNV0NWdEZsMXFydm5H?=
 =?utf-8?B?ZG55TlFPZTVjbVFUVGwzanFEYktCQ3hNaElVLzVLajdrdXlFdVplNkdlNE5S?=
 =?utf-8?B?bXhrT1Fic2RuVk5oeFBieVVXRzJqMHRPc09idGtsQlExVTRTd1ZOb0lWWFR4?=
 =?utf-8?B?MGJud3pxUGhVV2RJK1piTHRQNmF3RVlmYWU0QjByUGJ4amhYY0p3R2tTcHM5?=
 =?utf-8?B?ak4wNXR3QllBZ1cySTdyZFF3amlvUjBlZGthTzdVRmxFT055OTMvMEJUQUhW?=
 =?utf-8?B?L080eDhCRms4dElVdDZQQWthYVJyM1ZoZENrMDh6WGNGL2RFU3ArWWd6Vkwv?=
 =?utf-8?B?VVF6US9wN1FOdFFwcmpFVUhiZTQwRi94TTZtb2o0dytnK3BnTlNuZEt0WERW?=
 =?utf-8?B?WFd2ckZsWUM3RGkweWpTMkxoRHFVWXRZQUZpSHhsMEozYWpiN1RCZ05xZEtT?=
 =?utf-8?B?eU90Z1cxWWljVmtvdXlQVklHYWdjYlkrVEFnSWNGMlh3TUV0ZVhkMDljQU9J?=
 =?utf-8?B?a2R5NHRjVEVYN2V3eWdjWXVXQkxwYVBPNE1UUFA2bGVBMU0zMmFmZmFFQ1Jp?=
 =?utf-8?B?dVFxYTFWb1p5RjdlNEJXOEpKcm80NXdCM21mcGtqQzdON1JucFV1K0FrU0VN?=
 =?utf-8?B?Q2dQZi9NMmhKcThoTVdTRnlmUGhMTklNRkg5VUFOM29TUDk0NkZqeEFabW5U?=
 =?utf-8?B?V3V3M1d4ZXBpSlNXOWUvWGVNSkhRNm5mVHhlMmV3bXdYdWxJZmJCWkNxUmlJ?=
 =?utf-8?B?S3k4aGVYWGV4ZEdNTUNta3RLWG40Sm9UVm5WeEVyZ0xJekNSMDFlWFJPQWpz?=
 =?utf-8?B?UEtVdHNmVmZSaXdBMXZxcjk3UnJlWlNRUEd6QWdXNkVRNUhDQ1pJZ0U3czJK?=
 =?utf-8?B?SEt2alNBVWMvR3dXSHN6SUIyVFFGRUlWdDBLakdrNUxDSVVjWDdod3BBYUlS?=
 =?utf-8?B?dDYwelAvajVSajFFUmtoQWRhMS9rcVFFZXFQNVp0MWcyZTgvTkRGOTJDZTg5?=
 =?utf-8?B?bmVIRXpTRzRGRXVvUDZmeTV5ajUvY201cWNWcWhFMjlMUm1LeGNwMEVKWVBF?=
 =?utf-8?B?azc0eDZGWTA5K3ZyN0J4ckxZNHc4SDNqWSszUUF4WXhpRjlLN0tqeU9OQVZV?=
 =?utf-8?B?bVl2RWpHZ0hyUDczZFdkaUR5UFpRWHNRTDl2QkgvQ2JDaG5sRDliQ1RVRFU5?=
 =?utf-8?B?UkRaWGVOQmVtMEpKbFhRUHFCMHVnTTdGdUdoOElsc0FCd1dITnNoQ3BieEJ6?=
 =?utf-8?B?dys3QTV0SFp0VllyVVlMLzl5UW1UT2E2cXcvOTUyVHNBY1JlUEk1cWl4THVH?=
 =?utf-8?B?cmxISkd0QXUzVlZvb1hLSkNYeWU4TUM2WEhwdEtUZ2Fsc2F6UFVMam5LOFhP?=
 =?utf-8?B?L3VpZXNtVk00ZllheitNNnMwaFlvMlorNTIrcHJKTXZuem5LbUtkUW5MY2s0?=
 =?utf-8?B?V0tmakxxNHJHd1R3M3AvN2hjWmw4VmpyL1hWQS9qUmtreFNUeno2VTlKcGtI?=
 =?utf-8?B?eWk2b1hEbGo3UTNUdWtWaUJqNTRTTW1uNVA4NTFwelhpZGc2QmxqSGJlUWJT?=
 =?utf-8?B?cHc3ZnhqckRSSHhWMFdBb2owWDZIbU5tVTdNN1BhZVcyb04wS0tWRHV5dUFD?=
 =?utf-8?B?VXNsTmNNUUhVTkc1TFpraUU2dVdqa0NzdndMS1hhOG0wZ1l6d0d6anRDWGxV?=
 =?utf-8?B?bkZmdjZLYWNUY1BhTjZrZkRpNzNJU1lKRGxwdHY2TlJwQ1EwM3ZobVFaQWMz?=
 =?utf-8?B?Mkx4d1dtRUJNQ2p1a2lJWG94dlI4YjdHRGRPcDB1R2NEejNxcTJ5MkFybGha?=
 =?utf-8?B?S0NBa2xLZGR6b0Q3czR6d2NGMk82emhwMGIvaU94WHVqVzltK3hEcFdQaHRC?=
 =?utf-8?B?SzBRZ1lSRU1oUWJBejhnTGxnZDdGNVBpVlphNEZTcnpEUXZVWlJSa01yWHF2?=
 =?utf-8?B?NnZYcWhnMGZranc4VjVLbHg3QVRaRSsvem0rVEtsRVlGSDRLM3Vobk8rTXRW?=
 =?utf-8?B?UE9hVTlKS09PVGVQR3JaTzkrajNVd2VKWVdrc3Vwam01eEtWM3RVQlMxNk9D?=
 =?utf-8?B?eGkzaUNSdDd6OUxQbnVUZHJFTG0xakp4SHc2Z0lHcHdlbkxKRmdpdHBvZU5K?=
 =?utf-8?B?UVJBdmlCOHFQNU1yNXp5bmJ5TW5MN1p0L1lKOVVOUFhoYko4ek1KekVadGl4?=
 =?utf-8?B?OThES0tMTFZvME1Eay9FejVkY1lRPT0=?=
X-OriginatorOrg: a-eberle.de
X-MS-Exchange-CrossTenant-Network-Message-Id: 87ef0352-c5a0-4a3e-fad5-08db98e2768b
X-MS-Exchange-CrossTenant-AuthSource: DU0PR10MB7436.EURPRD10.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Aug 2023 14:11:02.3418
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: c2996bb3-18ea-41df-986b-e80d19297774
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: 64f0PIGQZlexaHDbk5j1jNOej5VUpYTdvxYl7K7Bc6WDnf3iP8JGm84beFgpl7d4/sylgLfkAMf+uGpTOGrf/2s5CVJyLXXnJpb9SW9BS3k=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR10MB7098
X-cloud-security-sender: stephan.wurm@a-eberle.de
X-cloud-security-recipient: linux-kernel@vger.kernel.org
X-cloud-security-crypt: load encryption module
X-cloud-security-Mailarchiv: E-Mail archived for: stephan.wurm@a-eberle.de
X-cloud-security-Mailarchivtype: outbound
X-cloud-security-Virusscan: CLEAN
X-cloud-security-disclaimer: This E-Mail was scanned by E-Mailservice on mx-relay91-hz2.antispameurope.com with 4DCE810C45AF
X-cloud-security-connect: mail-am7eur03lp2237.outbound.protection.outlook.com[104.47.51.237], TLS=1, IP=104.47.51.237
X-cloud-security-Digest: 15c4249789ccf6e0cbf0d8cc4586b352
X-cloud-security: scantime:2.667
X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,DKIM_INVALID,
        DKIM_SIGNED,RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,
        SPF_HELO_NONE,SPF_PASS autolearn=no 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

Am 09. Aug 15:53 hat hch geschrieben:
> Well, a scatterlist culd contain a highmem page, in which case sg_virt
> isn't going to cut it and you need to kmap.  Is this a 32-bit system
> with highmem enabled?
I can confirm it is a 32-bit system with highmem enabled.