linux-kernel - [GIT PULL] x86/urgent for v5.13-rc6

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Date:   Sun, 20 Jun 2021 08:59:31 +0200
From:   Borislav Petkov <bp@...e.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     x86-ml <x86@...nel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] x86/urgent for v5.13-rc6

Hi Linus,

here are some x86/urgent fixes before 5.13 releases. This time, I'm not
even going to think of saying that they're the last batch. :)

Please pull,
thx.

---

The following changes since commit 614124bea77e452aa6df7a8714e8bc820b489922:

  Linux 5.13-rc5 (2021-06-06 15:47:27 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/x86_urgent_for_v5.13_rc6

for you to fetch changes up to 28e5e44aa3f4e0e0370864ed008fb5e2d85f4dc8:

  x86/mm: Avoid truncating memblocks for SGX memory (2021-06-18 19:37:01 +0200)

----------------------------------------------------------------
A first set of urgent fixes to the FPU/XSTATE handling mess^W code.
(There's a lot more in the pipe):

- Prevent corruption of the XSTATE buffer in signal handling by
  validating what is being copied from userspace first.

- Invalidate other task's preserved FPU registers on XRSTOR failure
  (#PF) because latter can still modify some of them.

- Restore the proper PKRU value in case userspace modified it

- Reset FPU state when signal restoring fails

Other:

- Map EFI boot services data memory as encrypted in a SEV guest so that
  the guest can access it and actually boot properly

- Two SGX correctness fixes: proper resources freeing and a NUMA fix

----------------------------------------------------------------
Andy Lutomirski (1):
      x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer

Fan Du (1):
      x86/mm: Avoid truncating memblocks for SGX memory

Kai Huang (1):
      x86/sgx: Add missing xa_destroy() when virtual EPC is destroyed

Thomas Gleixner (4):
      x86/fpu: Prevent state corruption in __fpu__restore_sig()
      x86/process: Check PF_KTHREAD and not current->mm for kernel threads
      x86/pkru: Write hardware init value to PKRU when xstate is init
      x86/fpu: Reset state for all signal restore failures

Tom Lendacky (1):
      x86/ioremap: Map EFI-reserved memory as encrypted for SEV

 arch/x86/include/asm/fpu/internal.h | 13 ++++++---
 arch/x86/kernel/cpu/sgx/virt.c      |  1 +
 arch/x86/kernel/fpu/signal.c        | 54 ++++++++++++++++++++++++-------------
 arch/x86/mm/ioremap.c               |  4 ++-
 arch/x86/mm/numa.c                  |  8 +++++-
 5 files changed, 56 insertions(+), 24 deletions(-)

-- 
Regards/Gruss,
    Boris.

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