From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752091AbeA0Iax (ORCPT ); Sat, 27 Jan 2018 03:30:53 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:38681 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751446AbeA0Iaw (ORCPT ); Sat, 27 Jan 2018 03:30:52 -0500 Date: Sat, 27 Jan 2018 09:30:37 +0100 (CET) From: Thomas Gleixner To: kernel test robot cc: Andrey Ryabinin , Dmitry Vyukov , Alexander Potapenko , LKML , Ingo Molnar , "H. Peter Anvin" , tipbuild@zytor.com, lkp@01.org Subject: Re: [lkp-robot] [x86/kasan] def0e7b54d: Kernel_panic-not_syncing:memblock_virt_alloc_try_nid:Failed_to_allocate#by tes_align=#nid=#from=#max_addr= In-Reply-To: <20180127080359.GA10097@yexl-desktop> Message-ID: References: <20180127080359.GA10097@yexl-desktop> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 27 Jan 2018, kernel test robot wrote: > Hi, Andrey > > Is this panic log expected with your commit? Yes it is. It says that there is not enough memroy to run with KASAN. If you revert it the machine will die with a NULL pointer dereference at some other place w/o telling you what the reason is. > [ 0.000000] Kernel panic - not syncing: memblock_virt_alloc_try_nid: Failed to allocate 4096 bytes align=0x1000 nid=0 from=0x1000000 max_addr=0x0 Thanks, tglx