linux-kernel - Re: [PATCH v2 0/2] mm,fork,security: introduce MADV

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Message-ID: <8fe8040c-7595-ec09-6ce7-0da4fadc82c4@redhat.com>
Date:   Wed, 9 Aug 2017 14:42:51 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>,
        Rik van Riel <riel@...hat.com>
Cc:     Michal Hocko <mhocko@...nel.org>, linux-kernel@...r.kernel.org,
        mike.kravetz@...cle.com, linux-mm@...ck.org, colm@...costs.net,
        akpm@...ux-foundation.org, keescook@...omium.org,
        luto@...capital.net, wad@...omium.org, mingo@...nel.org,
        dave.hansen@...el.com, linux-api@...r.kernel.org
Subject: Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK

On 08/09/2017 11:59 AM, Kirill A. Shutemov wrote:
> It's not obvious to me what would break if kernel would ignore
> MADV_DONTFORK or MADV_DONTDUMP.

Ignoring MADV_DONTDUMP could cause secrets to be written to disk,
contrary to the expected security policy of the system.

Thanks,
Florian