linux-kernel - Re: [PATCH 04/29] x86/livepatch: Validate __fentry_

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Date:   Wed, 23 Feb 2022 09:33:52 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org,
        joao@...rdrivepizza.com, hjl.tools@...il.com,
        andrew.cooper3@...rix.com, linux-kernel@...r.kernel.org,
        ndesaulniers@...gle.com, keescook@...omium.org,
        samitolvanen@...gle.com, mark.rutland@....com,
        alyssa.milburn@...el.com, Miroslav Benes <mbenes@...e.cz>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Subject: Re: [PATCH 04/29] x86/livepatch: Validate __fentry__ location

On Wed, 23 Feb 2022 09:23:27 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> 	return ip <= (rec->ip + MCOUNT_INSN_SIZE) ? rec->ip : 0;

That should be < and not <=, as I added the + MCOUNT_INSN_SIZE as an after
thought, and that addition changes the compare.

-- Steve