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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 8 Aug 2017 11:58:13 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>, riel@...hat.com,
        linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, colm@...costs.net, akpm@...ux-foundation.org,
        keescook@...omium.org, luto@...capital.net, wad@...omium.org,
        mingo@...nel.org, kirill@...temov.name, dave.hansen@...el.com
Subject: Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK

On 08/07/2017 08:23 PM, Mike Kravetz wrote:
> If my thoughts above are correct, what about returning EINVAL if one
> attempts to set MADV_DONTFORK on mappings set up for sharing?

That's my preference as well.  If there is a use case for shared or
non-anonymous mappings, then we can implement MADV_DONTFORK with the
semantics for this use case.  If we pick some arbitrary semantics now,
without any use case, we might end up with something that's not actually
useful.

Thanks,
Florian