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 (diff)
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> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
next 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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