From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752188AbdCMOYL (ORCPT ); Mon, 13 Mar 2017 10:24:11 -0400 Received: from mail-he1eur01on0135.outbound.protection.outlook.com ([104.47.0.135]:24480 "EHLO EUR01-HE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752860AbdCMOYD (ORCPT ); Mon, 13 Mar 2017 10:24:03 -0400 Authentication-Results: google.com; dkim=none (message not signed) header.d=none;google.com; dmarc=none action=none header.from=virtuozzo.com; Subject: Re: [mm/kasan] 80a9201a59 BUG: kernel reboot-without-warning in early-boot stage, last printk: Booting the kernel. To: Fengguang Wu , Alexander Potapenko References: <20170228031227.tm7flsxl7t7klspf@wfg-t540p.sh.intel.com> CC: Andrew Morton , Linux Memory Management List , , , LKP , Dmitry Vyukov From: Andrey Ryabinin Message-ID: <5211ff97-29ab-c3b5-670b-db98662ce009@virtuozzo.com> Date: Mon, 13 Mar 2017 17:25:04 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 MIME-Version: 1.0 In-Reply-To: <20170228031227.tm7flsxl7t7klspf@wfg-t540p.sh.intel.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [195.214.232.6] X-ClientProxiedBy: DB6PR02CA0030.eurprd02.prod.outlook.com (10.170.218.171) To VI1PR0801MB2064.eurprd08.prod.outlook.com (10.173.74.149) X-MS-Office365-Filtering-Correlation-Id: a28ad547-86e0-4294-d73f-08d46a1c96ca X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001);SRVR:VI1PR0801MB2064; X-Microsoft-Exchange-Diagnostics: 1;VI1PR0801MB2064;3:+Yva71lzDDe4pYQtik9yctEZ1beucbpUkFgWwpqqjDxqxbhCZ7tyvpEXyJkmmEAIIDzI+TYwEM5bmtEhIgJPPC3K/pmUp0c3Ez62dYNspKKVje9DIqdJc2SXMMYFsgbNrRl247vVDfDnNCNvxJ2W/QcE/+MAOcmwBfMaZ98VHoHCEnOVcGXgusl7ptklc0/GXr30sIumWBmvia+uLeRA5FlhOuG35OqWGWDne1ZPntIw0FxhkMcET0nwFDW9rqXbo26u3QAIZ6EkjL7B+ck66Q==;25:64bQcc9R/iQabMSSoZ+GBZbRSxe87/foctKXf35GwjykCP/dXUXAL/ZMtYwj8ZT5O6BejUtXHI1d1vYImbFB1YvZxIUR/X/sbbkAywpxkPHklQE9MZqLQtQb8da5pQPPxlBZU/db+1Nf4E4spS9Pu/EO9wMwe2R7T14JUvpO3SeK180R8E6Fx8DJ8lyw+BSMMUhflMtFPOZlMhqlImLM7oMBOlGBHSwIlovt/m6GCZslxsWjWDTGiSjbJbxs5bpJQcZVy+UzEpXbBDnb7uUrh1oxqFnjOQMIqHqayqupAsB50qiRa+Vy9es+xx6mS4Uu4TFcTdMydskUY9QFlrhxdwqxenA20vvhad70Hl1Jrji4sPERGmghXkJRkkar9VuqiQKh5StI/fn7wfeMb2UcZuYf2ZOBWqi2AK+RExREz3Gs6H7r+uD0tmjyp2wwSgWOdB5mMP6+sjjaMiYyl3a/tg== X-Microsoft-Exchange-Diagnostics: 1;VI1PR0801MB2064;31:lda1idBLnbRuV2NNKYC7qKF5sFkXygfitTAjAJ7oS3PNvgz+Y/otgelkqzXbCID2oqd6Tvo/hMhe8tFLyDn9ZRBJYI263vv4HoeA/VUUaMLXlUacFq9xUsoqHEiCqBoiOr+m0h7FA++9SxqJfst/e3VKat54zgY+3SEdToCfxuXl7H6ZCe1DZpEE5XGsw7F9tkGd9PVn6vFfx6jAZkYqsiZsyqA/zdU/2M9zoBPVzn38xOm2DoZ1xEoAsFdf5kCmKem/KPsLtE2YUgJobmiG/g==;20:gHBtiyJI1iGhRQITohCzsZWepe990h3By0/GrKqHaVZ2wVT3mZkVin72rTlyesRnKfBzSn+RGh1BMryEQeUE01+xyEEGD3e8PVoxvC+LUnQ7D1CKAcHhiMf7P0fORwUydbCvmQFcxA8OM5bLiArNZtBJB8Qr82fLDcLqnlHICbezUOneopPj5ZW2zENIe+VH5svD+MgMg1aF1NxCcrXUMjlSn/Ly8DVPY9fEoynfNSauo+c2FwdLcMyIcKU7W7VjdvNQ9B4FlhvWCwFn5PuzG66SRh45AkpssNplbzK8er4h20YE8s76uMN+mWl0or92UC12D9ITAor7Cwy3gwnQftv6Y2vACgvOMVkrCsV5ky/XNOE1fCc7aETv9u2v16PEHf2nufFA7QwBd4CxOxzXN3tD0s6mCxQtaZW7SV54YI4= X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; 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The attached > reproduce-* script may help debug the problem. > ... > +--------------------------------------------------------------------------------------+------------+------------+ > | | c146a2b98e | 80a9201a59 | > +--------------------------------------------------------------------------------------+------------+------------+ > | boot_successes | 740 | 48 | > | boot_failures | 0 | 142 | > | BUG:kernel_reboot-without-warning_in_early-boot_stage,last_printk:Booting_the_kernel | 0 | 131 | > | BUG:kernel_in_stage | 0 | 11 | > +--------------------------------------------------------------------------------------+------------+------------+ > Indeed it is an old bug, I'll send a fix shortly. But the bisection result is not correct. This bug is actually much older. Note that commit 80a9201a596 changes Kconfig dependency - it removes depends on SLUB_DEBUG from config KASAN section. And yours config has: # CONFIG_SLUB_DEBUG is not set So you simply test c146a2b98e with CONFIG_KASAN=n and 80a9201a59 with CONFIG_KASAN=y