linux-kernel - Re: [PATCH v12 2/6] kasan: allow architectures to provide an outline readiness check

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Message-ID: <87fsxiv2t8.fsf@dja-thinkpad.axtens.net>
Date:   Wed, 16 Jun 2021 14:41:39 +1000
From:   Daniel Axtens <dja@...ens.net>
To:     Marco Elver <elver@...gle.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        linuxppc-dev@...ts.ozlabs.org,
        kasan-dev <kasan-dev@...glegroups.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        aneesh.kumar@...ux.ibm.com, Balbir Singh <bsingharora@...il.com>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: Re: [PATCH v12 2/6] kasan: allow architectures to provide an
 outline readiness check

Hi Marco,
>> +       /* Don't touch the shadow memory if arch isn't ready */
>> +       if (!kasan_arch_is_ready())
>> +               return;
>> +
>
> What about kasan_poison_last_granule()? kasan_unpoison() currently
> seems to potentially trip on that.

Ah the perils of rebasing an old series! I'll re-audit the generic code
for functions that touch memory and make sure I have covered them all.

Thanks for the review.

Kind regards,
Daniel

>
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