linux-kernel - [GIT PULL] x86/asm changes for v5.3

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Date:   Mon, 8 Jul 2019 14:22:47 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/asm changes for v5.3

Linus,

Please pull the latest x86-asm-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-asm-for-linus

   # HEAD: 7457c0da024b181a9143988d740001f9bc98698d x86/alternatives: Add int3_emulate_call() selftest

Most of the changes relate to Peter Zijlstra's cleanup of ptregs 
handling, in particular the i386 part is now much simplified and 
standardized - no more partial ptregs stack frames via the esp/ss oddity. 
This simplifies ftrace, kprobes, the unwinder, ptrace, kdump and kgdb.

There's also a CR4 hardening enhancements by Kees Cook, to make the 
generic platform functions such as native_write_cr4() less useful as ROP 
gadgets that disable SMEP/SMAP. Also protect the WP bit of CR0 against 
similar attacks.

The rest is smaller cleanups/fixes.

 Thanks,

	Ingo

------------------>
Ira Weiny (1):
      Documentation/x86: Fix path to entry_32.S

Kees Cook (2):
      x86/asm: Pin sensitive CR4 bits
      x86/asm: Pin sensitive CR0 bits

Peter Zijlstra (7):
      x86/entry/32: Clean up return from interrupt preemption path
      x86/stackframe: Move ENCODE_FRAME_POINTER to asm/frame.h
      x86/stackframe, x86/kprobes: Fix frame pointer annotations
      x86/stackframe, x86/ftrace: Add pt_regs frame annotations
      x86/stackframe/32: Provide consistent pt_regs
      x86/stackframe/32: Allow int3_emulate_push()
      x86/alternatives: Add int3_emulate_call() selftest

Steven Rostedt (VMware) (1):
      x86/asm: Remove unused TASK_TI_flags from asm-offsets.c


 Documentation/x86/exception-tables.rst |   2 +-
 arch/x86/entry/calling.h               |  15 ----
 arch/x86/entry/entry_32.S              | 145 ++++++++++++++++++++++++---------
 arch/x86/include/asm/frame.h           |  49 +++++++++++
 arch/x86/include/asm/kexec.h           |  17 ----
 arch/x86/include/asm/ptrace.h          |  17 +---
 arch/x86/include/asm/special_insns.h   |  37 ++++++++-
 arch/x86/include/asm/stacktrace.h      |   2 +-
 arch/x86/include/asm/text-patching.h   |   2 -
 arch/x86/kernel/alternative.c          |  81 +++++++++++++++++-
 arch/x86/kernel/asm-offsets.c          |   1 -
 arch/x86/kernel/cpu/common.c           |  20 +++++
 arch/x86/kernel/crash.c                |   8 --
 arch/x86/kernel/ftrace.c               |   7 --
 arch/x86/kernel/ftrace_32.S            |  78 ++++++++++--------
 arch/x86/kernel/ftrace_64.S            |   3 +
 arch/x86/kernel/kgdb.c                 |   8 --
 arch/x86/kernel/kprobes/common.h       |  28 +++----
 arch/x86/kernel/kprobes/core.c         |  29 +++----
 arch/x86/kernel/kprobes/opt.c          |  20 +++--
 arch/x86/kernel/process_32.c           |  16 ++--
 arch/x86/kernel/ptrace.c               |  29 -------
 arch/x86/kernel/smpboot.c              |   8 +-
 arch/x86/kernel/time.c                 |   3 +-
 arch/x86/kernel/unwind_frame.c         |  32 +-------
 arch/x86/kernel/unwind_orc.c           |   2 +-
 26 files changed, 394 insertions(+), 265 deletions(-)