linux-kernel - [PATCH -tip 0/2] x86/kprobes: Fix and cleanup can

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Date:   Thu, 25 Mar 2021 19:08:20 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        "H . Peter Anvin" <hpa@...or.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Colin Ian King <colin.king@...onical.com>,
        dan.carpenter@...cle.com,
        Muhammad Usama Anjum <musamaanjum@...il.com>
Subject: [PATCH -tip 0/2] x86/kprobes: Fix and cleanup can_boost()

Hi,

Here are 2 bugfixes for the x86/kprobes, [1/2] fixes an old bug which tries to find
instruction prefixes in insn->opcode (which should be never found) and misusing
insn->attr. [2/2] fixes a new bug found by Coverity in the recent commit 6256e668b7
("x86/kprobes: Use int3 instead of debug trap for single-step").
To fix the 2nd one, [2/2] also cleanup the switch-case with range cases, because
that is much more clear what is not boostable.

Thank you,

---

Masami Hiramatsu (2):
      x86/kprobes: Fix to check non boostable prefixes correctly
      x86/kprobes: Fix to identify indirect jmp and others using range case


 arch/x86/kernel/kprobes/core.c |   57 +++++++++++++++++++++-------------------
 1 file changed, 30 insertions(+), 27 deletions(-)

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