From: rabin@rab.in (Rabin Vincent)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 7/8] ARM: mm: allow non-text sections to be non-executable
Date: Sun, 31 Aug 2014 16:59:21 +0200 [thread overview]
Message-ID: <20140831145921.GA4931@dator> (raw)
In-Reply-To: <CAGXu5j+OnpaZAJRsSsR=iid8178p+4hR5xzrJ7N3F94DZ7DYMg@mail.gmail.com>
On Fri, Aug 29, 2014 at 09:04:41AM -0700, Kees Cook wrote:
> On Tue, Aug 26, 2014 at 7:43 AM, Will Deacon <will.deacon@arm.com> wrote:
> > Hmm, so do you mandate that preemption is disabled during sections of code
> > where the permissions must be changed after boot? (e.g. ftrace patching)
>
> I guess it's not enforced (how do I make sure preempt is off?), but
> it's only used during the ftrace patching. I'm open to suggestions! (I
> had avoided going the fixmap route since I would have expected that to
> be much slower.)
For ftrace patching this is called under stop_machine() so preemption is
already off there.
next prev parent reply other threads:[~2014-08-31 14:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-13 17:06 [PATCH v4 0/8] arm: support CONFIG_RODATA Kees Cook
2014-08-13 17:06 ` [PATCH v4 1/8] arm: use generic fixmap.h Kees Cook
2014-08-13 17:06 ` [PATCH v4 2/8] ARM: expand fixmap region to 3MB Kees Cook
2014-08-19 12:26 ` Will Deacon
2014-08-20 12:16 ` Kees Cook
2014-08-26 14:37 ` Will Deacon
2014-08-13 17:06 ` [PATCH v4 3/8] arm: fixmap: implement __set_fixmap() Kees Cook
2014-08-13 17:06 ` [PATCH v4 4/8] arm: use fixmap for text patching when text is RO Kees Cook
2014-08-19 12:29 ` Will Deacon
2014-08-20 12:28 ` Kees Cook
2014-09-03 21:43 ` Kees Cook
2014-09-04 9:27 ` Will Deacon
2014-09-04 14:00 ` Kees Cook
2014-09-04 14:06 ` Will Deacon
2014-08-13 17:06 ` [PATCH v4 5/8] ARM: kexec: Make .text R/W in machine_kexec Kees Cook
2014-08-13 17:06 ` [PATCH v4 6/8] arm: kgdb: Handle read-only text / modules Kees Cook
2014-08-13 17:06 ` [PATCH v4 7/8] ARM: mm: allow non-text sections to be non-executable Kees Cook
2014-08-19 12:33 ` Will Deacon
2014-08-20 12:37 ` Kees Cook
2014-08-26 14:43 ` Will Deacon
2014-08-29 16:04 ` Kees Cook
2014-08-31 14:59 ` Rabin Vincent [this message]
2014-08-13 17:06 ` [PATCH v4 8/8] ARM: mm: allow text and rodata sections to be read-only Kees Cook
2014-08-19 12:36 ` Will Deacon
2014-08-20 12:52 ` Kees Cook
2014-08-13 17:38 ` [PATCH v4 0/8] arm: support CONFIG_RODATA Nicolas Pitre
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