Re: [PATCH 4.4-cip 0/6] Extend user-space ASLR range

Ben Hutchings <ben.hutchings@...>

On Tue, 2017-01-03 at 15:56 -0800, Kees Cook wrote:
On Mon, Dec 19, 2016 at 2:52 AM, Jan Kiszka <jan.kiszka@...> wrote:
On 2016-12-09 13:20, Jan Kiszka wrote:
Did you try to discuss the back-port topic with the KSPP folks or other
key persons involved in these patches? In the ideal case, the authors
can be CC'ed, do not get annoyed by "these crazy people doing legacy
stuff", and may even do some reviews.
I've chatted with Elena over this last week, and she talked to Kees who
pointed out that the Android people are also doing KSPP backports to 4.4
(thanks, folks!). I didn't check any details, just a heads-up to avoid
duplicate work.

The Android common kernel tree is visible here:

In the android-4.4 branch, the backport are these:

b471fcd FROMLIST: mm: ASLR: use get_random_long()
9a3fe39 FROMLIST: drivers: char: random: add get_random_long()
d51891f FROMLIST: x86: mm: support ARCH_MMAP_RND_BITS.
e2240a1 FROMLIST: arm64: mm: support ARCH_MMAP_RND_BITS.
25106ff FROMLIST: arm: mm: support ARCH_MMAP_RND_BITS.
d49d887 FROMLIST: mm: mmap: Add new /proc tunable for mmap_base ASLR.

Hopefully that helps!
Thanks. My backports are identical aside from the placement of some
changes in Kconfig files, which shouldn't make a functional difference.


Ben Hutchings
Software Developer, Codethink Ltd.

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