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From: Kees Cook <keescook@chromium.org>
To: akpm@linux-foundation.org
Subject: [PATCH 0/5] split ET_DYN ASLR from mmap ASLR
Date: Thu, 26 Feb 2015 19:07:09 -0800
Message-Id: <1425006434-3106-1-git-send-email-keescook@chromium.org>
Cc: linux-mips@linux-mips.org, Arun Chandran <achandran@mvista.com>,
 Catalin Marinas <catalin.marinas@arm.com>,
 Heiko Carstens <heiko.carstens@de.ibm.com>, linux-kernel@vger.kernel.org,
 Min-Hua Chen <orca.chen@gmail.com>, Paul Mackerras <paulus@samba.org>,
 Ismael Ripoll <iripoll@upv.es>, Yann Droneaud <ydroneaud@opteya.com>,
 linux-s390@vger.kernel.org, Russell King <linux@arm.linux.org.uk>,
 Andrey Ryabinin <a.ryabinin@samsung.com>,
 Behan Webster <behanw@converseincode.com>, x86@kernel.org,
 Hector Marco-Gisbert <hecmargi@upv.es>, "David A. Long" <dave.long@linaro.org>,
 Ben Hutchings <ben@decadent.org.uk>, Kees Cook <keescook@chromium.org>,
 Will Deacon <will.deacon@arm.com>, linux-fsdevel@vger.kernel.org,
 Alex Smith <alex@alex-smith.me.uk>,
 Michael Holzheu <holzheu@linux.vnet.ibm.com>,
 linux-arm-kernel@lists.infradead.org, Jeff Bailey <jeffbailey@google.com>,
 Paul Burton <paul.burton@imgtec.com>, Oleg Nesterov <oleg@redhat.com>,
 Ralf Baechle <ralf@linux-mips.org>, Andy Lutomirski <luto@amacapital.net>,
 Vineeth Vijayan <vvijayan@mvista.com>,
 Markos Chandras <markos.chandras@imgtec.com>,
 =?UTF-8?q?Jan-Simon=20M=C3=B6ller?= <dl9pf@gmx.de>,
 Martin Schwidefsky <schwidefsky@de.ibm.com>, linux390@de.ibm.com,
 linuxppc-dev@lists.ozlabs.org, Alexander Viro <viro@zeniv.linux.org.uk>
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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