linux-kernel - Re: [PATCH v8 10/11] arm64/kasan: explicitly zero kasan shadow memory

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Message-ID: <c76f72fc-21ed-62d0-014e-8509c0374f96@oracle.com>
Date:   Thu, 14 Sep 2017 21:30:28 -0400
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        x86@...nel.org, kasan-dev@...glegroups.com, borntraeger@...ibm.com,
        heiko.carstens@...ibm.com, davem@...emloft.net,
        willy@...radead.org, mhocko@...nel.org, ard.biesheuvel@...aro.org,
        will.deacon@....com, catalin.marinas@....com, sam@...nborg.org,
        mgorman@...hsingularity.net, Steven.Sistare@...cle.com,
        daniel.m.jordan@...cle.com, bob.picco@...cle.com
Subject: Re: [PATCH v8 10/11] arm64/kasan: explicitly zero kasan shadow memory

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