From: Emese Revfy <re.emese@gmail.com>
To: Kees Cook <keescook@chromium.org>
Cc: "kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
PaX Team <pageexec@freemail.hu>,
Brad Spengler <spender@grsecurity.net>,
Michal Marek <mmarek@suse.com>,
LKML <linux-kernel@vger.kernel.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
linux-kbuild <linux-kbuild@vger.kernel.org>,
"Theodore Ts'o" <tytso@mit.edu>,
Andrew Morton <akpm@linux-foundation.org>,
Linux-MM <linux-mm@kvack.org>, Jens Axboe <axboe@kernel.dk>,
Al Viro <viro@zeniv.linux.org.uk>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
bart.vanassche@sandisk.com,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH v1 1/3] Add the latent_entropy gcc plugin
Date: Tue, 24 May 2016 23:23:24 +0200 [thread overview]
Message-ID: <20160524232324.45fbcf77916866f30b0d6cec@gmail.com> (raw)
In-Reply-To: <CAGXu5jJHenHARDZt=51m1XbSStTxpG90Dv=Fpkn79A6pZYtGOw@mail.gmail.com>
On Tue, 24 May 2016 10:32:15 -0700
Kees Cook <keescook@chromium.org> wrote:
> Also, does this matter that it's non-atomic? It seems like the u64
> below is being written to by multiple threads and even read by
> multiple threads. Am I misunderstanding something?
The non-atomic accesses are intentional because
they can extract more latent entropy from these data races.
> > [...]
> > new file mode 100644
> > index 0000000..7295c39
> > --- /dev/null
> > +++ b/scripts/gcc-plugins/latent_entropy_plugin.c
>
> I feel like most of the functions in this plugin could use some more
> comments about what each one does.
I think the important parts are commented (most parts just use the gcc API).
Where would you like more comments?
--
Emese
next prev parent reply other threads:[~2016-05-24 21:16 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-23 22:14 [PATCH v1 0/3] Introduce the latent_entropy gcc plugin Emese Revfy
2016-05-23 22:15 ` [PATCH v1 1/3] Add " Emese Revfy
2016-05-24 17:32 ` Kees Cook
2016-05-24 21:23 ` Emese Revfy [this message]
2016-05-24 23:40 ` PaX Team
2016-05-25 2:55 ` Kees Cook
2016-05-30 22:39 ` Emese Revfy
2016-05-23 22:16 ` [PATCH v1 2/3] Mark functions with the latent_entropy attribute Emese Revfy
2016-05-24 17:16 ` Kees Cook
2016-05-24 20:45 ` Emese Revfy
2016-05-24 20:55 ` Kees Cook
2016-05-23 22:17 ` [PATCH v1 3/3] Add the extra_latent_entropy kernel parameter Emese Revfy
2016-05-24 17:09 ` Kees Cook
2016-05-24 20:29 ` Emese Revfy
2016-05-29 17:59 [PATCH v1 1/3] Add the latent_entropy gcc plugin Hector Martin
2016-05-30 2:16 ` Kees Cook
2016-05-30 3:46 ` Hector Martin "marcan"
2016-05-30 15:40 ` Kees Cook
2016-05-30 20:24 ` Hector Martin "marcan"
2016-05-31 17:25 ` Kees Cook
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