linux-kernel - Re: [PATCH 0/3] tracing/kprobes: Fix event generation API etc.

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Date:   Wed, 20 May 2020 23:22:20 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Tom Zanussi <zanussi@...nel.org>, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 0/3] tracing/kprobes: Fix event generation API etc.

Hi Steve,

It seems this fixes are not picked up yet.
Would you have any consideration?

Thank you,

On Sat, 25 Apr 2020 14:48:59 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> Hello,
> 
> Here are bugfix/cleanup patches for the kprobe tracer, [1/3]
> is a typo fix, [2/3] is fixing boot-time tracer and [3/3] is
> error checking for the new in-kernel kprobe event API.
> 
> Tom, I found that your commit 29a154810546 ("tracing: Change
> trace_boot to use kprobe_event interface") broke the boot-time
> tracer's kprobe event because of wrong API usage. Could you
> review it?
> 
> I marked [3/3] as a bugfix, because if the loc == NULL, 
> __kprobe_event_gen_cmd_start() obviously does not work.
> But it reports actual error at kprobe_event_gen_cmd_end().
> That is not good for developers to debug it.
> 
> Thank you,
> 
> ---
> 
> Masami Hiramatsu (3):
>       tracing/kprobes: Fix a double initialization typo
>       tracing/boottime: Fix kprobe event API usage
>       tracing/kprobes: Reject new event if loc is NULL
> 
> 
>  kernel/trace/trace_boot.c   |   20 ++++++++------------
>  kernel/trace/trace_kprobe.c |    8 +++++++-
>  2 files changed, 15 insertions(+), 13 deletions(-)
> 
> --
> Masami Hiramatsu (Linaro) <mhiramat@...nel.org>


-- 
Masami Hiramatsu <mhiramat@...nel.org>