Date: Thu, 18 Feb 2016 11:46:42 +0100 From: "PaX Team" <pageexec@...email.hu> To: David Brown <david.brown@...aro.org>, Kees Cook <keescook@...omium.org> CC: Russell King <linux@....linux.org.uk>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, Ingo Molnar <mingo@...hat.com>, Andy Lutomirski <luto@...capital.net>, "H. Peter Anvin" <hpa@...or.com>, Michael Ellerman <mpe@...erman.id.au>, Mathias Krause <minipli@...glemail.com>, Thomas Gleixner <tglx@...utronix.de>, "x86@...nel.org" <x86@...nel.org>, Arnd Bergmann <arnd@...db.de>, Emese Revfy <re.emese@...il.com>, LKML <linux-kernel@...r.kernel.org>, linux-arch <linux-arch@...r.kernel.org> 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 <david.brown@...aro.org> 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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