From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751768AbdIOBcR (ORCPT ); Thu, 14 Sep 2017 21:32:17 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:50422 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751599AbdIOBcQ (ORCPT ); Thu, 14 Sep 2017 21:32:16 -0400 Subject: Re: [PATCH v8 10/11] arm64/kasan: explicitly zero kasan shadow memory To: Mark Rutland Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, kasan-dev@googlegroups.com, borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, davem@davemloft.net, willy@infradead.org, mhocko@kernel.org, ard.biesheuvel@linaro.org, will.deacon@arm.com, catalin.marinas@arm.com, sam@ravnborg.org, mgorman@techsingularity.net, Steven.Sistare@oracle.com, daniel.m.jordan@oracle.com, bob.picco@oracle.com References: <20170914223517.8242-1-pasha.tatashin@oracle.com> <20170914223517.8242-11-pasha.tatashin@oracle.com> <20170915011035.GA6936@remoulade> From: Pavel Tatashin Message-ID: Date: Thu, 14 Sep 2017 21:30:28 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <20170915011035.GA6936@remoulade> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Mark, Thank you for looking at this. We can't do this because page table is not set until cpu_replace_ttbr1() is called. So, we can't do memset() on this memory until then. Pasha