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[PATCH 0/5] split ET_DYN ASLR from mmap ASLR

To: akpm@linux-foundation.org
Subject: [PATCH 0/5] split ET_DYN ASLR from mmap ASLR
From: Kees Cook <keescook@chromium.org>
Date: Thu, 26 Feb 2015 19:07:09 -0800
Cc: Kees Cook <keescook@chromium.org>, Russell King <linux@arm.linux.org.uk>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Ralf Baechle <ralf@linux-mips.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, Martin Schwidefsky <schwidefsky@de.ibm.com>, Heiko Carstens <heiko.carstens@de.ibm.com>, linux390@de.ibm.com, x86@kernel.org, Alexander Viro <viro@zeniv.linux.org.uk>, Oleg Nesterov <oleg@redhat.com>, Andy Lutomirski <luto@amacapital.net>, "David A. Long" <dave.long@linaro.org>, Andrey Ryabinin <a.ryabinin@samsung.com>, Arun Chandran <achandran@mvista.com>, Yann Droneaud <ydroneaud@opteya.com>, Min-Hua Chen <orca.chen@gmail.com>, Paul Burton <paul.burton@imgtec.com>, Alex Smith <alex@alex-smith.me.uk>, Markos Chandras <markos.chandras@imgtec.com>, Vineeth Vijayan <vvijayan@mvista.com>, Jeff Bailey <jeffbailey@google.com>, Michael Holzheu <holzheu@linux.vnet.ibm.com>, Ben Hutchings <ben@decadent.org.uk>, Behan Webster <behanw@converseincode.com>, Ismael Ripoll <iripoll@upv.es>, Hector Marco-Gisbert <hecmargi@upv.es>, Jan-Simon Möller <dl9pf@gmx.de>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org
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This separates ET_DYN ASLR from mmap ASLR, as already done on s390. The
various architectures that are already randomizing mmap (arm, arm64, mips,
powerpc, s390, and x86), have their various forms of arch_mmap_rnd()
made available via the new CONFIG_ARCH_HAS_ELF_RANDOMIZE. For these
architectures, arch_randomize_brk() is collapsed as well.

This is an alternative to the solutions in:
https://lkml.org/lkml/2015/2/23/442

Thanks!

-Kees


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