linux-kernel - Re: [PATCH 6/9] kprobes: Prohibit probing on hardirq tracers

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Date:   Thu, 10 Jan 2019 12:12:31 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Ingo Molnar <mingo@...hat.com>, peterz@...radead.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andrea Righi <righi.andrea@...il.com>, stable@...r.kernel.org
Subject: Re: [PATCH 6/9] kprobes: Prohibit probing on hardirq tracers

On Thu, 10 Jan 2019 11:56:53 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> Since kprobes breakpoint handling involves hardirq tracer,
> probing these functions cause breakpoint recursion problem.
> 
> Prohibit probing on those functions.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> ---
>  kernel/trace/trace_irqsoff.c    |    9 +++++++--
>  kernel/trace/trace_preemptirq.c |    5 +++++
>  2 files changed, 12 insertions(+), 2 deletions(-)
> 


Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

-- Steve