Re: [PATCH -tip v2 2/3] [BUGFIX] kprobes/x86: Prohibit probing ondebug_stack_*

[Steven Rostedt]

On Fri, 01 Nov 2013 11:25:34 +0000
Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx> wrote:

> Prohibit probing on debug_stack_reset and debug_stack_set_zero.
> Since the both functions are called from TRACE_IRQS_ON/OFF_DEBUG
> macros which run in int3 ist entry, probing it may cause a soft
> lockup.
> 
> This happens when the kernel built with CONFIG_DYNAMIC_FTRACE=y
> and CONFIG_TRACE_IRQFLAGS=y.
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxx>
> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
> Cc: Seiji Aguchi <seiji.aguchi@xxxxxxx>
> ---

Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>

-- Steve
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