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Date: Thu, 18 Feb 2016 11:46:42 +0100
From: "PaX Team" <>
To: David Brown <>, Kees Cook <>
CC: Russell King <>,
        "" <>,
        "" <>,
        Ingo Molnar <>, Andy Lutomirski <>,
        "H. Peter Anvin" <>,
        Michael Ellerman <>,
        Mathias Krause <>,
        Thomas Gleixner <>,
        "" <>, Arnd Bergmann <>,
        Emese Revfy <>, LKML <>,
        linux-arch <>
Subject: Re: [PATCH] ARM: vdso: Mark vDSO code as read-only

On 17 Feb 2016 at 15:48, Kees Cook wrote:

> On Wed, Feb 17, 2016 at 3:43 PM, David Brown <> wrote:

> > Is there a possible future consideration to perhaps make .rodata read
> > only much earlier?
> Yeah, this will likely be a future improvement. Some architectures
> already mark .rodata before the mark_rodata_ro() call. Once we start
> to have more use of postinit-readonly, I suspect we'll see more
> clarification of when those things happen.

FYI, PaX had enforced early rodata on i386 during the 2.4 series (i.e.,
decade+ ago) but i abandoned it for 2.6 due to the maintenance burden
coupled with its low benefit...

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