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

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Date:   Fri, 25 Jun 2021 10:54:06 +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

Hi Linus,

here are two more x86/urgent fixes for 5.13.

Please pull,
thx.

---

The following changes since commit 13311e74253fe64329390df80bed3f07314ddd61:

  Linux 5.13-rc7 (2021-06-20 15:03:15 -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

for you to fetch changes up to f9dfb5e390fab2df9f7944bb91e7705aba14cd26:

  x86/fpu: Make init_fpstate correct with optimized XSAVE (2021-06-22 11:06:21 +0200)

----------------------------------------------------------------
Two more urgent FPU fixes:

 - prevent unprivileged userspace from reinitializing supervisor states

 - Prepare init_fpstate, which is the buffer used when initializing
 FPU state, properly in case the skip-writing-state-components XSAVE*
 variants are used.

----------------------------------------------------------------
Thomas Gleixner (2):
      x86/fpu: Preserve supervisor states in sanitize_restored_user_xstate()
      x86/fpu: Make init_fpstate correct with optimized XSAVE

 arch/x86/include/asm/fpu/internal.h | 30 ++++++++-------------------
 arch/x86/kernel/fpu/signal.c        | 26 ++++++++---------------
 arch/x86/kernel/fpu/xstate.c        | 41 ++++++++++++++++++++++++++++++++++---
 3 files changed, 54 insertions(+), 43 deletions(-)

-- 
Regards/Gruss,
    Boris.

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