Re: [PATCH v4 0/10] split ET_DYN ASLR from mmap ASLR
From: Kees Cook <hidden>
Date: 2015-03-04 21:58:14
Also in:
linux-arm-kernel, linux-fsdevel, linux-mips, lkml
On Wed, Mar 4, 2015 at 1:54 PM, Ingo Molnar [off-list ref] wrote:
* Kees Cook [off-list ref] wrote:quoted
To address the "offset2lib" ASLR weakness[1], this separates ET_DYN ASLR from mmap ASLR, as already done on s390. The 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 I've been able to test x86 and arm, and the buildbot (so far) seems happy with building the rest.Ok, this looks really good - for all patches: Reviewed-by: Ingo Molnar [off-list ref]
Great! Thanks for the suggestions and reviews. :) -Kees -- Kees Cook Chrome OS Security