Re: [PATCH v4 3.0-rc2-tip 7/22] 7: uprobes: mmap and fork hooks.

[Peter Zijlstra]

On Tue, 2011-06-07 at 18:29 +0530, Srikar Dronamraju wrote:
> +       up_write(&mm->mmap_sem);
> +       mutex_lock(&uprobes_mutex);
> +       down_read(&mm->mmap_sem); 

egads, and all that without a comment explaining why you think that is
even remotely sane.

I'm not at all convinced, it would expose the mmap() even though you
could still decide to tear it down if this function were to fail, I bet
there's some funnies there.

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