From: Daniel Micay <danielmicay@gmail.com>
To: kernel-hardening@lists.openwall.com, Emese Revfy <re.emese@gmail.com>
Cc: 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>,
minipli@ld-linux.so, Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
David Brown <david.brown@linaro.org>,
"benh@kernel.crashing.org" <benh@kernel.crashing.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Jeff Layton <jlayton@poochiereds.net>,
Arnd Bergmann <arnd@arndb.de>, Sam Ravnborg <sam@ravnborg.org>,
Karsten Keil <isdn@linux-pingi.de>
Subject: Re: [kernel-hardening] Re: [PATCH v2 2/3] Mark functions with the __nocapture attribute
Date: Tue, 12 Jul 2016 15:23:59 -0400 [thread overview]
Message-ID: <1468351439.32683.1.camel@gmail.com> (raw)
In-Reply-To: <CAGXu5jKKd-VcuLooiRV-ktbnYuB_EaOtUbQOOy7e5VGNgWBU-A@mail.gmail.com>
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On Tue, 2016-07-12 at 15:08 -0400, Kees Cook wrote:
> On Mon, Jul 4, 2016 at 7:42 PM, Emese Revfy <re.emese@gmail.com>
> wrote:
> >
> > The nocapture gcc attribute can be on functions only.
> > The attribute takes one or more unsigned integer constants as
> > parameters
> > that specify the function argument(s) of const char* type to
> > initify.
> > If the marked argument is a vararg then the plugin initifies
> > all vararg arguments.
>
> Why is this called "nocapture"? Not captured by what? It seems like
> it
> means "initify this if possible". Am I misunderstanding its purpose?
It means they don't escape via that function, i.e. they aren't stored
anywhere to be used in any way after the call.
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next prev parent reply other threads:[~2016-07-12 19:24 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-04 23:39 [PATCH v2 0/3] Introduce the initify gcc plugin Emese Revfy
2016-07-04 23:39 ` [kernel-hardening] " Emese Revfy
2016-07-04 23:40 ` [PATCH v2 1/3] Add " Emese Revfy
2016-07-04 23:40 ` [kernel-hardening] " Emese Revfy
2016-07-12 19:45 ` Kees Cook
2016-07-12 19:45 ` [kernel-hardening] " Kees Cook
2016-07-12 19:45 ` Kees Cook
2016-07-12 20:07 ` Emese Revfy
2016-07-12 20:07 ` [kernel-hardening] " Emese Revfy
2016-07-12 20:07 ` Emese Revfy
2016-07-12 20:05 ` Kees Cook
2016-07-12 20:05 ` [kernel-hardening] " Kees Cook
2016-07-12 20:05 ` Kees Cook
2016-07-13 20:34 ` Emese Revfy
2016-07-13 20:34 ` [kernel-hardening] " Emese Revfy
2016-07-13 20:34 ` Emese Revfy
2016-07-12 22:08 ` Russell King - ARM Linux
2016-07-12 22:08 ` [kernel-hardening] " Russell King - ARM Linux
2016-07-12 22:08 ` Russell King - ARM Linux
2016-07-12 22:38 ` Kees Cook
2016-07-12 22:38 ` [kernel-hardening] " Kees Cook
2016-07-12 22:38 ` Kees Cook
2016-07-13 21:26 ` Emese Revfy
2016-07-13 21:26 ` [kernel-hardening] " Emese Revfy
2016-07-13 21:26 ` Emese Revfy
2016-07-13 20:48 ` Emese Revfy
2016-07-13 20:48 ` [kernel-hardening] " Emese Revfy
2016-07-13 20:48 ` Emese Revfy
2016-07-13 21:04 ` Kees Cook
2016-07-13 21:04 ` [kernel-hardening] " Kees Cook
2016-07-13 21:04 ` Kees Cook
2016-07-04 23:42 ` [PATCH v2 2/3] Mark functions with the __nocapture attribute Emese Revfy
2016-07-04 23:42 ` [kernel-hardening] " Emese Revfy
2016-07-12 19:08 ` Kees Cook
2016-07-12 19:08 ` [kernel-hardening] " Kees Cook
2016-07-12 19:08 ` Kees Cook
2016-07-12 19:23 ` Daniel Micay [this message]
2016-07-12 19:47 ` [kernel-hardening] " Kees Cook
2016-07-12 19:47 ` Kees Cook
2016-07-04 23:43 ` [PATCH v2 3/3] Constify some function parameters Emese Revfy
2016-07-04 23:43 ` [kernel-hardening] " Emese Revfy
2016-07-04 23:58 ` kbuild test robot
2016-07-04 23:58 ` [kernel-hardening] " kbuild test robot
2016-07-06 16:45 ` Emese Revfy
2016-07-06 16:45 ` [kernel-hardening] " Emese Revfy
2016-07-06 16:44 ` Emese Revfy
2016-07-06 16:44 ` [kernel-hardening] " Emese Revfy
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