From: Emese Revfy <re.emese@gmail.com>
To: kernel-hardening@lists.openwall.com
Cc: pageexec@freemail.hu, spender@grsecurity.net, mmarek@suse.com,
keescook@chromium.org, linux-kernel@vger.kernel.org,
yamada.masahiro@socionext.com, linux-kbuild@vger.kernel.org,
tytso@mit.edu, akpm@linux-foundation.org, linux-mm@kvack.org,
axboe@kernel.dk, viro@zeniv.linux.org.uk,
paulmck@linux.vnet.ibm.com, mingo@redhat.com, tglx@linutronix.de,
bart.vanassche@sandisk.com, davem@davemloft.net
Subject: [PATCH v1 0/3] Introduce the latent_entropy gcc plugin
Date: Tue, 24 May 2016 00:14:05 +0200 [thread overview]
Message-ID: <20160524001405.3e6abd1d5a63a871cc366cff@gmail.com> (raw)
I would like to introduce the latent_entropy gcc plugin. This plugin mitigates
the problem of the kernel having too little entropy during and after boot
for generating crypto keys.
This plugin mixes random values into the latent_entropy global variable
in functions marked by the __latent_entropy attribute.
The value of this global variable is added to the kernel entropy pool
to increase the entropy.
It is a CII project supported by the Linux Foundation.
The latent_entropy plugin was ported from grsecurity/PaX originally written by
the PaX Team. You can find more about the plugin here:
https://grsecurity.net/pipermail/grsecurity/2012-July/001093.html
The plugin supports all gcc version from 4.5 to 6.0.
I do some changes above the PaX version. The important one is mixing
the stack pointer into the global variable too.
You can find more about the changes here:
https://github.com/ephox-gcc-plugins/latent_entropy
This patch set is based on the "Introduce GCC plugin infrastructure" patch set (v9).
Emese Revfy (3):
Add the latent_entropy gcc plugin
Mark functions with the latent_entropy attribute
Add the extra_latent_entropy kernel parameter
---
Documentation/kernel-parameters.txt | 5 +
arch/Kconfig | 22 ++
arch/powerpc/kernel/Makefile | 8 +-
block/blk-softirq.c | 2 +-
drivers/char/random.c | 6 +-
fs/namespace.c | 2 +-
include/linux/compiler-gcc.h | 5 +
include/linux/compiler.h | 4 +
include/linux/fdtable.h | 2 +-
include/linux/genhd.h | 2 +-
include/linux/init.h | 10 +-
include/linux/random.h | 12 +-
init/main.c | 1 +
kernel/fork.c | 5 +-
kernel/rcu/tiny.c | 2 +-
kernel/rcu/tree.c | 2 +-
kernel/sched/fair.c | 2 +-
kernel/softirq.c | 4 +-
kernel/time/timer.c | 2 +-
lib/irq_poll.c | 2 +-
lib/random32.c | 2 +-
mm/page_alloc.c | 28 ++
net/core/dev.c | 4 +-
scripts/Makefile.gcc-plugins | 10 +-
scripts/gcc-plugins/Makefile | 1 +
scripts/gcc-plugins/latent_entropy_plugin.c | 446 ++++++++++++++++++++++++++++
26 files changed, 562 insertions(+), 29 deletions(-)
next reply other threads:[~2016-05-23 22:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-23 22:14 Emese Revfy [this message]
2016-05-23 22:15 ` [PATCH v1 1/3] Add the latent_entropy gcc plugin Emese Revfy
2016-05-24 17:32 ` Kees Cook
2016-05-24 21:23 ` Emese Revfy
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
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