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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	Borislav Petkov <bp@alien8.de>, Juergen Gross <jgross@suse.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	xen-devel@lists.xenproject.org
Subject: [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX
Date: Wed,  4 Sep 2019 20:45:47 +0900	[thread overview]
Message-ID: <156759754770.24473.11832897710080799131.stgit@devnote2> (raw)

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>

WARNING: multiple messages have this Message-ID
From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Juergen Gross <jgross@suse.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	Borislav Petkov <bp@alien8.de>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	xen-devel@lists.xenproject.org,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: [Xen-devel] [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX
Date: Wed,  4 Sep 2019 20:45:47 +0900	[thread overview]
Message-ID: <156759754770.24473.11832897710080799131.stgit@devnote2> (raw)

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>

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             reply	other threads:[~2019-09-04 11:45 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-04 11:45 Masami Hiramatsu [this message]
2019-09-04 11:45 ` [Xen-devel] [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 11:45   ` [Xen-devel] " 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 11:46   ` [Xen-devel] " Masami Hiramatsu
2019-09-04 11:54 ` [Xen-devel] [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX Andrew Cooper
2019-09-04 11:54   ` Andrew Cooper
2019-09-05  1:49   ` Masami Hiramatsu
2019-09-05  1:49     ` Masami Hiramatsu
2019-09-05  7:54     ` Andrew Cooper
2019-09-05  7:54       ` Andrew Cooper
2019-09-05  8:26       ` Peter Zijlstra
2019-09-05  8:26         ` Peter Zijlstra
2019-09-05  8:53         ` Andrew Cooper
2019-09-05  8:53           ` Andrew Cooper
2019-09-05  9:26           ` Peter Zijlstra
2019-09-05  9:26             ` Peter Zijlstra
2019-09-05  9:38             ` Andrew Cooper
2019-09-05  9:38               ` Andrew Cooper
2019-09-05 12:49           ` [OT] " Masami Hiramatsu
2019-09-05 12:49             ` [Xen-devel] [OT] " Masami Hiramatsu
2019-09-05 11:32       ` [Xen-devel] " Masami Hiramatsu
2019-09-05 11:32         ` Masami Hiramatsu
2019-09-05 13:09         ` Masami Hiramatsu
2019-09-05 13:09           ` Masami Hiramatsu
2019-09-05 13:31           ` Andrew Cooper
2019-09-05 13:31             ` Andrew Cooper
2019-09-05 16:12             ` Masami Hiramatsu
2019-09-05 16:12               ` Masami Hiramatsu
2019-09-04 12:02 ` Peter Zijlstra
2019-09-04 12:02   ` [Xen-devel] " Peter Zijlstra

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