linux-kernel - Re: [RFC][PATCH] x86: ptrace: Add function argument access API

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Date:   Tue, 16 Oct 2018 14:59:24 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Andy Lutomirski <luto@...capital.net>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [RFC][PATCH] x86: ptrace: Add function argument access API

On Mon, 15 Oct 2018 23:56:46 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> This patch looks good to me.
> But if the concern is real, all regs_get_kernel_stack_nth() user must move
> onto _safe() version, at least all tracers code.

Doing a git grep on regs_get_kernel_stack_nth(), I think you are right.
I'll resend and make the _nth() function just the _safe() function. No
need to do it without the probe_kernel_read() call.

> 
> Reviewed-by: Masami Hiramatsu <mhiramat@...nel.org>

Thanks,

-- Steve

> 
>