Messages in this thread | | | Date | Wed, 4 Sep 2019 14:02:32 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH -tip 0/2] x86: Prohibit kprobes on XEN_EMULATE_PREFIX |
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On Wed, Sep 04, 2019 at 08:45:47PM +0900, Masami Hiramatsu wrote: > 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
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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