[GIT PULL] core/core updates for v5.8

[Borislav Petkov]

Hi Linus,

please pull the set disabling automatic READ_IMPLIES_EXEC on x86-64 and
arm64.

Thx.

---
The following changes since commit ae83d0b416db002fe95601e7f97f64b59514d936:

  Linux 5.7-rc2 (2020-04-19 14:35:30 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/core_core_updates_for_5.8

for you to fetch changes up to 6e0d6ac5f3d9d90271899f6d340872360fe1caee:

  arm64/elf: Disable automatic READ_IMPLIES_EXEC for 64-bit address spaces (2020-04-20 19:44:27 +0200)

----------------------------------------------------------------
Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK
now that toolchains long support PT_GNU_STACK marking and there's no
need anymore to force modern programs into having all its user mappings
executable instead of only the stack and the PROT_EXEC ones. Disable
that automatic READ_IMPLIES_EXEC forcing on x86-64 and arm64. Add tables
documenting how READ_IMPLIES_EXEC is handled on x86-64, arm and arm64.
By Kees Cook.

----------------------------------------------------------------
Kees Cook (6):
      x86/elf: Add table to document READ_IMPLIES_EXEC
      x86/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK
      x86/elf: Disable automatic READ_IMPLIES_EXEC on 64-bit
      arm32/64/elf: Add tables to document READ_IMPLIES_EXEC
      arm32/64/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK
      arm64/elf: Disable automatic READ_IMPLIES_EXEC for 64-bit address spaces

 arch/arm/kernel/elf.c        | 27 +++++++++++++++++++++++----
 arch/arm64/include/asm/elf.h | 23 ++++++++++++++++++++++-
 arch/x86/include/asm/elf.h   | 22 +++++++++++++++++++++-
 fs/compat_binfmt_elf.c       |  5 +++++
 4 files changed, 71 insertions(+), 6 deletions(-)

-- 
Regards/Gruss,
    Boris.

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