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    SubjectRe: [PATCH -tip v8 08/13] arm: kprobes: Make a space for regs->ARM_pc at kretprobe_trampoline

    * Masami Hiramatsu <mhiramat@kernel.org> wrote:

    > Change kretprobe_trampoline to make a space for regs->ARM_pc so that
    > kretprobe_trampoline_handler can call instruction_pointer_set()
    > safely.

    The idiom is "make space", but in any case, what does this mean?

    Was the stack frame set up in kretprobe_trampoline() and calling
    trampoline_handler() buggy?

    If yes, then explain the bad effects of the bug, and make all of this clear
    in the title & changelog.

    Thanks,

    Ingo

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