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 v2 0/3] Introduce the latent_entropy gcc plugin
Date: Tue, 31 May 2016 01:30:29 +0200 [thread overview]
Message-ID: <20160531013029.4c5db8b570d86527b0b53fe4@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 next-20160520).
Emese Revfy (3):
Add the latent_entropy gcc plugin
Mark functions with the latent_entropy attribute
Add the extra_latent_entropy kernel parameter
Changes from v1:
* Remove unnecessary ifdefs
(Suggested-by: Kees Cook <keescook@chromium.org>)
* Separate the two definitions of add_latent_entropy()
(Suggested-by: Kees Cook <keescook@chromium.org>)
* Removed unnecessary global variable (latent_entropy_plugin.c)
* About the latent_entropy gcc attribute (latent_entropy_plugin.c)
* Measure the boot time performance impact of the latent_entropy plugin (arch/Kconfig)
---
Documentation/kernel-parameters.txt | 5 +
arch/Kconfig | 23 ++
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 | 4 +-
include/linux/random.h | 14 +-
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 | 30 ++
net/core/dev.c | 4 +-
scripts/Makefile.gcc-plugins | 10 +-
scripts/gcc-plugins/Makefile | 1 +
scripts/gcc-plugins/latent_entropy_plugin.c | 454 ++++++++++++++++++++++++++++
26 files changed, 569 insertions(+), 29 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
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 v2 0/3] Introduce the latent_entropy gcc plugin
Date: Tue, 31 May 2016 01:30:29 +0200 [thread overview]
Message-ID: <20160531013029.4c5db8b570d86527b0b53fe4@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 next-20160520).
Emese Revfy (3):
Add the latent_entropy gcc plugin
Mark functions with the latent_entropy attribute
Add the extra_latent_entropy kernel parameter
Changes from v1:
* Remove unnecessary ifdefs
(Suggested-by: Kees Cook <keescook@chromium.org>)
* Separate the two definitions of add_latent_entropy()
(Suggested-by: Kees Cook <keescook@chromium.org>)
* Removed unnecessary global variable (latent_entropy_plugin.c)
* About the latent_entropy gcc attribute (latent_entropy_plugin.c)
* Measure the boot time performance impact of the latent_entropy plugin (arch/Kconfig)
---
Documentation/kernel-parameters.txt | 5 +
arch/Kconfig | 23 ++
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 | 4 +-
include/linux/random.h | 14 +-
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 | 30 ++
net/core/dev.c | 4 +-
scripts/Makefile.gcc-plugins | 10 +-
scripts/gcc-plugins/Makefile | 1 +
scripts/gcc-plugins/latent_entropy_plugin.c | 454 ++++++++++++++++++++++++++++
26 files changed, 569 insertions(+), 29 deletions(-)
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WARNING: multiple messages have this Message-ID (diff)
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: [kernel-hardening] [PATCH v2 0/3] Introduce the latent_entropy gcc plugin
Date: Tue, 31 May 2016 01:30:29 +0200 [thread overview]
Message-ID: <20160531013029.4c5db8b570d86527b0b53fe4@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 next-20160520).
Emese Revfy (3):
Add the latent_entropy gcc plugin
Mark functions with the latent_entropy attribute
Add the extra_latent_entropy kernel parameter
Changes from v1:
* Remove unnecessary ifdefs
(Suggested-by: Kees Cook <keescook@chromium.org>)
* Separate the two definitions of add_latent_entropy()
(Suggested-by: Kees Cook <keescook@chromium.org>)
* Removed unnecessary global variable (latent_entropy_plugin.c)
* About the latent_entropy gcc attribute (latent_entropy_plugin.c)
* Measure the boot time performance impact of the latent_entropy plugin (arch/Kconfig)
---
Documentation/kernel-parameters.txt | 5 +
arch/Kconfig | 23 ++
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 | 4 +-
include/linux/random.h | 14 +-
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 | 30 ++
net/core/dev.c | 4 +-
scripts/Makefile.gcc-plugins | 10 +-
scripts/gcc-plugins/Makefile | 1 +
scripts/gcc-plugins/latent_entropy_plugin.c | 454 ++++++++++++++++++++++++++++
26 files changed, 569 insertions(+), 29 deletions(-)
next reply other threads:[~2016-05-30 23:23 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-30 23:30 Emese Revfy [this message]
2016-05-30 23:30 ` [kernel-hardening] [PATCH v2 0/3] Introduce the latent_entropy gcc plugin Emese Revfy
2016-05-30 23:30 ` Emese Revfy
2016-05-30 23:31 ` [PATCH v2 1/3] Add " Emese Revfy
2016-05-30 23:31 ` [kernel-hardening] " Emese Revfy
2016-05-30 23:31 ` Emese Revfy
2016-06-01 19:42 ` Andrew Morton
2016-06-01 19:42 ` [kernel-hardening] " Andrew Morton
2016-06-01 19:42 ` Andrew Morton
2016-06-03 17:42 ` Emese Revfy
2016-06-03 17:42 ` [kernel-hardening] " Emese Revfy
2016-06-03 17:42 ` Emese Revfy
2016-06-06 13:38 ` [kernel-hardening] " David Brown
2016-06-06 13:38 ` David Brown
2016-06-06 15:50 ` Kees Cook
2016-06-06 15:50 ` Kees Cook
2016-06-06 15:50 ` Kees Cook
2016-06-06 19:30 ` PaX Team
2016-06-06 19:30 ` PaX Team
2016-06-06 23:13 ` Theodore Ts'o
2016-06-06 23:13 ` Theodore Ts'o
2016-06-07 12:19 ` PaX Team
2016-06-07 12:19 ` PaX Team
2016-06-07 13:58 ` Theodore Ts'o
2016-06-07 13:58 ` Theodore Ts'o
2016-06-09 17:22 ` PaX Team
2016-06-09 17:22 ` PaX Team
2016-06-09 19:55 ` Theodore Ts'o
2016-06-09 19:55 ` Theodore Ts'o
2016-06-09 20:08 ` Kees Cook
2016-06-09 20:08 ` Kees Cook
2016-06-09 20:08 ` Kees Cook
2016-06-09 21:51 ` Kees Cook
2016-06-09 21:51 ` [kernel-hardening] " Kees Cook
2016-06-09 21:51 ` Kees Cook
2016-06-09 21:51 ` Kees Cook
2016-06-13 21:49 ` Emese Revfy
2016-06-13 21:49 ` [kernel-hardening] " Emese Revfy
2016-06-13 21:49 ` Emese Revfy
2016-06-13 21:49 ` Emese Revfy
2016-06-14 18:27 ` Kees Cook
2016-06-14 18:27 ` [kernel-hardening] " Kees Cook
2016-06-14 18:27 ` Kees Cook
2016-06-14 18:27 ` Kees Cook
2016-06-14 22:31 ` Emese Revfy
2016-06-14 22:31 ` [kernel-hardening] " Emese Revfy
2016-06-14 22:31 ` Emese Revfy
2016-06-14 22:31 ` Emese Revfy
2016-05-30 23:32 ` [PATCH v2 2/3] Mark functions with the latent_entropy attribute Emese Revfy
2016-05-30 23:32 ` [kernel-hardening] " Emese Revfy
2016-05-30 23:32 ` Emese Revfy
2016-05-30 23:34 ` [PATCH v2 3/3] Add the extra_latent_entropy kernel parameter Emese Revfy
2016-05-30 23:34 ` [kernel-hardening] " Emese Revfy
2016-05-30 23:34 ` Emese Revfy
2016-06-09 21:18 ` [PATCH v2 0/3] Introduce the latent_entropy gcc plugin Kees Cook
2016-06-09 21:18 ` [kernel-hardening] " Kees Cook
2016-06-09 21:18 ` Kees Cook
2016-06-09 21:18 ` Kees Cook
2016-06-09 23:33 ` Emese Revfy
2016-06-09 23:33 ` [kernel-hardening] " Emese Revfy
2016-06-09 23:33 ` Emese Revfy
2016-06-09 23:33 ` Emese Revfy
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