From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ot0-f198.google.com (mail-ot0-f198.google.com [74.125.82.198]) by kanga.kvack.org (Postfix) with ESMTP id 978636B0038 for ; Mon, 13 Mar 2017 10:24:02 -0400 (EDT) Received: by mail-ot0-f198.google.com with SMTP id p41so226981272otb.4 for ; Mon, 13 Mar 2017 07:24:02 -0700 (PDT) Received: from EUR01-HE1-obe.outbound.protection.outlook.com (mail-he1eur01on0116.outbound.protection.outlook.com. [104.47.0.116]) by mx.google.com with ESMTPS id q9si4628859ota.293.2017.03.13.07.24.01 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 13 Mar 2017 07:24:01 -0700 (PDT) Subject: Re: [mm/kasan] 80a9201a59 BUG: kernel reboot-without-warning in early-boot stage, last printk: Booting the kernel. References: <20170228031227.tm7flsxl7t7klspf@wfg-t540p.sh.intel.com> From: Andrey Ryabinin Message-ID: <5211ff97-29ab-c3b5-670b-db98662ce009@virtuozzo.com> Date: Mon, 13 Mar 2017 17:25:04 +0300 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 Sender: owner-linux-mm@kvack.org List-ID: To: Fengguang Wu , Alexander Potapenko Cc: Andrew Morton , Linux Memory Management List , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, LKP , Dmitry Vyukov On 02/28/2017 06:12 AM, Fengguang Wu wrote: > Hi Alexander, > > FYI, we find an old bug that's still alive in linux-next. 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org