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Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin

From Arnd Bergmann <arnd@arndb.de>
Newsgroups linux.kernel
Subject Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin
Date 2017-03-28 10:00 +0200
Message-ID <tpUcN-4ow-3@gated-at.bofh.it> (permalink)
References <t5NnA-5bA-27@gated-at.bofh.it> <t5NnA-5bA-41@gated-at.bofh.it> <tpzi1-5Ua-7@gated-at.bofh.it> <tpFx8-2mb-21@gated-at.bofh.it>
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On Mon, Mar 27, 2017 at 6:14 PM, Kees Cook <keescook@chromium.org> wrote:
> On Mon, Mar 27, 2017 at 12:38 AM, Andrew Donnellan
> <andrew.donnellan@au1.ibm.com> wrote:
>> On 01/02/17 07:24, Kees Cook wrote:
>>>
>>> From: Emese Revfy <re.emese@gmail.com>
>>>
>>> The kernel already has a mechanism to free up code and data memory that
>>> is only used during kernel or module initialization.  This plugin will
>>> teach the compiler to find more such code and data that can be freed
>>> after initialization.
>>
>>
>> Currently checking whether we can wire this up for powerpc without too many
>> problems...
>
> Cool, thanks. FWIW, note that this plugin is a bit back-burnered at
> the moment. I've got this in my -next tree still, but it needs some
> rather large changes to how it does its annotations before Linus will
> accept it.

I've tried turning it on again a few days ago and still got too many build
problems with my randconfig tree, so I've turned it off again. I think I've
already reported most of what I found now, so I did not send out new
reports.

      Arnd

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Thread

Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Andrew Donnellan <andrew.donnellan@au1.ibm.com> - 2017-03-27 11:40 +0200
  Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Kees Cook <keescook@chromium.org> - 2017-03-27 18:20 +0200
    Re: [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin Kees Cook <keescook@chromium.org> - 2017-03-27 21:40 +0200
    Re: [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2017-03-27 21:40 +0200
    Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Arnd Bergmann <arnd@arndb.de> - 2017-03-28 10:00 +0200
      Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Kees Cook <keescook@chromium.org> - 2017-03-28 21:10 +0200
        Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Arnd Bergmann <arnd@arndb.de> - 2017-03-28 22:40 +0200
  Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Andrew Donnellan <andrew.donnellan@au1.ibm.com> - 2017-03-28 05:10 +0200
    Re: [kernel-hardening] [PATCH v5 1/4] gcc-plugins: Add the initify  gcc plugin Kees Cook <keescook@chromium.org> - 2017-03-28 21:10 +0200

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