Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic... | linux-arm-kernel

[PATCH v4 00/14] Provide generic top-down mmap layout functions · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 01/14] mm, fs: Move randomize_stack_top from fs to mm · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 02/14] arm64: Make use of is_compat_task instead of hardcoding this test · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 02/14] arm64: Make use of is_compat_task instead of hardcoding this test · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
[PATCH v4 03/14] arm64: Consider stack randomization for mmap base only when necessary · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 03/14] arm64: Consider stack randomization for mmap base only when necessary · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
[PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Christoph Hellwig <hch@lst.de> · 2019-06-01
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Alexandre Ghiti <alex@ghiti.fr> · 2019-06-03
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Alex Ghiti <alex@ghiti.fr> · 2019-06-04
[PATCH v4 06/14] arm: Properly account for stack randomization and stack guard gap · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 07/14] arm: Use STACK_TOP when computing mmap base address · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 08/14] arm: Use generic mmap top-down layout and brk randomization · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 08/14] arm: Use generic mmap top-down layout and brk randomization · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 08/14] arm: Use generic mmap top-down layout and brk randomization · Alex Ghiti <alex@ghiti.fr> · 2019-05-31
[PATCH v4 09/14] mips: Properly account for stack randomization and stack guard gap · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 10/14] mips: Use STACK_TOP when computing mmap base address · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 11/14] mips: Adjust brk randomization offset to fit generic version · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 11/14] mips: Adjust brk randomization offset to fit generic version · Kees Cook <hidden> · 2019-05-29
[PATCH v4 12/14] mips: Replace arch specific way to determine 32bit task with generic version · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 12/14] mips: Replace arch specific way to determine 32bit task with generic version · Kees Cook <hidden> · 2019-05-29
[PATCH v4 13/14] mips: Use generic mmap top-down layout and brk randomization · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 13/14] mips: Use generic mmap top-down layout and brk randomization · Kees Cook <hidden> · 2019-05-29
[PATCH v4 14/14] riscv: Make mmap allocation top-down by default · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Alex Ghiti <alex@ghiti.fr> · 2019-05-31
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Alex Ghiti <alex@ghiti.fr> · 2019-06-13
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Alex Ghiti <alex@ghiti.fr> · 2019-06-30

Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout

From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2019-06-03 17:40:12
Also in: linux-fsdevel, linux-mips, linux-mm, linux-riscv, lkml

On Sun, May 26, 2019 at 09:47:37AM -0400, Alexandre Ghiti wrote:

This commits selects ARCH_HAS_ELF_RANDOMIZE when an arch uses the generic
topdown mmap layout functions so that this security feature is on by
default.
Note that this commit also removes the possibility for arm64 to have elf
randomization and no MMU: without MMU, the security added by randomization
is worth nothing.

Not planning on this anytime soon ;).

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

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