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

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Message-Id: <20190111232101.572db64cd592c43f20efdf95@kernel.org>
Date:   Fri, 11 Jan 2019 23:21:01 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.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 12:12:31 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> 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>

Thank you for your Ack!

> 
> -- Steve


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