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* [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX
@ 2019-09-04 11:45 Masami Hiramatsu
  2019-09-04 11:45 ` [PATCH -tip 1/2] x86: xen: insn: Decode XEN_EMULATE_PREFIX correctly Masami Hiramatsu
                   ` (3 more replies)
  0 siblings, 4 replies; 16+ messages in thread
From: Masami Hiramatsu @ 2019-09-04 11:45 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: Josh Poimboeuf, Peter Zijlstra, Randy Dunlap, Borislav Petkov,
	Juergen Gross, Boris Ostrovsky, Stefano Stabellini, x86,
	linux-kernel, xen-devel

Hi,

These patches allow x86 instruction decoder to decode
xen-cpuid which has XEN_EMULATE_PREFIX, and prohibit
kprobes to probe on it.

Josh reported that the objtool can not decode such special
prefixed instructions, and I found that we also have to
prohibit kprobes to probe on such instruction.

This series can be applied on -tip master branch which
has merged Josh's objtool/perf sharing common x86 insn
decoder series.


Thank you,

---

Masami Hiramatsu (2):
      x86: xen: insn: Decode XEN_EMULATE_PREFIX correctly
      x86: kprobes: Prohibit probing on instruction which has Xen prefix


 arch/x86/include/asm/insn.h             |    2 +
 arch/x86/include/asm/xen/interface.h    |    7 ++++-
 arch/x86/include/asm/xen/prefix.h       |   10 +++++++
 arch/x86/kernel/kprobes/core.c          |    4 +++
 arch/x86/lib/insn.c                     |   43 +++++++++++++++++++++++++++++++
 tools/arch/x86/include/asm/insn.h       |    2 +
 tools/arch/x86/include/asm/xen/prefix.h |   10 +++++++
 tools/arch/x86/lib/insn.c               |   43 +++++++++++++++++++++++++++++++
 tools/objtool/sync-check.sh             |    3 +-
 9 files changed, 121 insertions(+), 3 deletions(-)
 create mode 100644 arch/x86/include/asm/xen/prefix.h
 create mode 100644 tools/arch/x86/include/asm/xen/prefix.h

--
Masami Hiramatsu (Linaro) <mhiramat@kernel.org>

^ permalink raw reply	[flat|nested] 16+ messages in thread

end of thread, other threads:[~2019-09-05 16:12 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-04 11:45 [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX Masami Hiramatsu
2019-09-04 11:45 ` [PATCH -tip 1/2] x86: xen: insn: Decode XEN_EMULATE_PREFIX correctly Masami Hiramatsu
2019-09-04 11:46 ` [PATCH -tip 2/2] x86: kprobes: Prohibit probing on instruction which has Xen prefix Masami Hiramatsu
2019-09-04 11:54 ` [Xen-devel] [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX Andrew Cooper
2019-09-05  1:49   ` Masami Hiramatsu
2019-09-05  7:54     ` Andrew Cooper
2019-09-05  8:26       ` Peter Zijlstra
2019-09-05  8:53         ` Andrew Cooper
2019-09-05  9:26           ` Peter Zijlstra
2019-09-05  9:38             ` Andrew Cooper
2019-09-05 12:49           ` [OT] " Masami Hiramatsu
2019-09-05 11:32       ` Masami Hiramatsu
2019-09-05 13:09         ` Masami Hiramatsu
2019-09-05 13:31           ` Andrew Cooper
2019-09-05 16:12             ` Masami Hiramatsu
2019-09-04 12:02 ` Peter Zijlstra

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