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    SubjectRe: [PATCH -tip v2 2/3] [BUGFIX] kprobes/x86: Prohibit probing on debug_stack_*
    On Fri, 01 Nov 2013 11:25:34 +0000
    Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> 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@hitachi.com>
    > Cc: Thomas Gleixner <tglx@linutronix.de>
    > Cc: Ingo Molnar <mingo@redhat.com>
    > Cc: "H. Peter Anvin" <hpa@zytor.com>
    > Cc: Borislav Petkov <bp@suse.de>
    > Cc: Fenghua Yu <fenghua.yu@intel.com>
    > Cc: Seiji Aguchi <seiji.aguchi@hds.com>
    > ---

    Acked-by: Steven Rostedt <rostedt@goodmis.org>

    -- Steve


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