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From: Borislav Petkov <>
To: Linus Torvalds <>
Cc: x86-ml <>, lkml <>
Subject: [GIT PULL] x86/urgent for v5.13-rc6
Date: Sun, 20 Jun 2021 08:59:31 +0200	[thread overview]
Message-ID: <YM7nUwsJ+1v66B9m@zn.tnic> (raw)

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,


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:// 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


- 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(-)


SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg

             reply	other threads:[~2021-06-20  7:00 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-20  6:59 Borislav Petkov [this message]
2021-06-20 16:49 ` [GIT PULL] x86/urgent for v5.13-rc6 pr-tracker-bot

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