linux-kernel - Re: [PATCH 00/11] KASan for arm

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Date:   Tue, 17 Oct 2017 12:41:49 +0000
From:   "Liuwenliang (Lamb)" <liuwenliang@...wei.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Laura Abbott <labbott@...hat.com>
CC:     Florian Fainelli <f.fainelli@...il.com>,
        "aryabinin@...tuozzo.com" <aryabinin@...tuozzo.com>,
        "afzal.mohd.ma@...il.com" <afzal.mohd.ma@...il.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "mhocko@...e.com" <mhocko@...e.com>,
        "cdall@...aro.org" <cdall@...aro.org>,
        "marc.zyngier@....com" <marc.zyngier@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "mawilcox@...rosoft.com" <mawilcox@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "thgarnie@...gle.com" <thgarnie@...gle.com>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "vladimir.murzin@....com" <vladimir.murzin@....com>,
        "tixy@...aro.org" <tixy@...aro.org>,
        "ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>,
        "robin.murphy@....com" <robin.murphy@....com>,
        "mingo@...nel.org" <mingo@...nel.org>,
        "grygorii.strashko@...aro.org" <grygorii.strashko@...aro.org>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        "opendmb@...il.com" <opendmb@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kasan-dev@...glegroups.com" <kasan-dev@...glegroups.com>,
        Zengweilin <zengweilin@...wei.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Dailei <dylix.dailei@...wei.com>,
        "glider@...gle.com" <glider@...gle.com>,
        "dvyukov@...gle.com" <dvyukov@...gle.com>,
        Jiazhenghua <jiazhenghua@...wei.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Heshaoliang <heshaoliang@...wei.com>
Subject: Re: [PATCH 00/11] KASan for arm

On 10/17/2017 7:40 PM, Abbott Liu wrote:
>On Wed, Oct 11, 2017 at 03:10:56PM -0700, Laura Abbott wrote:
>The decompressor does not link with the standard C library, so it
>needs to provide implementations of standard C library functionality
>where required.  That means, if we have any memset() users, we need
>to provide the memset() function.
>
>The undef is there to avoid the optimisation we have in asm/string.h
>for __memzero, because we don't want to use __memzero in the
>decompressor.
>
>Whether memset() is required depends on which compression method is
>being used - LZO and LZ4 appear to make direct references to it, but
>the inflate (gzip) decompressor code does not.
>
>What this means is that all supported kernel compression options need
>to be tested.

Thanks for your review. I am sorry that I am so late to reply your email.
I will test all arm kernel compression options.