Date: Wed, 6 Apr 2016 23:49:36 +0200 From: "Rafael J. Wysocki" <rafael@...nel.org> To: Kees Cook <keescook@...omium.org> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, Matt Redfearn <matt.redfearn@...tec.com>, Yves-Alexis Perez <corsac@...ian.org>, Emrah Demir <ed@...sec.com>, Jonathan Corbet <corbet@....net>, x86@...nel.org, "Rafael J. Wysocki" <rjw@...ysocki.net>, Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>, Borislav Petkov <bp@...e.de>, Andy Lutomirski <luto@...nel.org>, "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>, "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, kernel-hardening@...ts.openwall.com Subject: Re: [PATCH] Prefer kASLR over Hibernation On Wed, Apr 6, 2016 at 9:44 PM, Kees Cook <keescook@...omium.org> wrote: > When building with both CONFIG_HIBERNATION and CONFIG_RANDOMIZE_BASE, > one or the other must be chosen at boot-time. Until now, hibernation > was selected when no choice was made on the command line. > > To make the security benefits of kASLR more widely available to end > users (since the use of hibernation is becoming more rare and kASLR, > already available on x86, will be available on arm64 and MIPS soon), > this changes the default to preferring kASLR over hibernation. Users > wanting hibernation can turn off kASLR by adding "nokaslr" to the kernel > command line. > > Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org> > Signed-off-by: Kees Cook <keescook@...omium.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com> Or do you want me to apply it?
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