linux-kernel - [BUGFIX PATCH -tip 0/2] x86/kprobes: Fix bugs in resume execution code

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Message-Id: <161425451732.93763.18329509061375062554.stgit@devnote2>
Date:   Thu, 25 Feb 2021 21:01:57 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Ananth N Mavinakayanahalli <ananth@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, mhiramat@...nel.org, x86@...nel.org
Subject: [BUGFIX PATCH -tip 0/2] x86/kprobes: Fix bugs in resume execution code

Hi,

Here are 2 bugfixes I have found in set_resume_flags().

The [1/2] fixes a bug which I have introduced by commit
abd82e533d88 ("x86/kprobes: Do not decode opcode in
resume_execution()"), and [2/2] has been there in the origin
of the x86 kprobes (before 2.6.12). Anyway, [2/2] is something
like a cosmetic patch, because the original code was mis-
understanding the opcode encoding, but the result is same.

Thank you,

---

Masami Hiramatsu (2):
      x86/kprobes: Retrieve correct opcode for group instruction
      x86/kprobes: Identify far indirect JMP correctly

 arch/x86/kernel/kprobes/core.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

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