On Wed, Jan 11, 2012 at 11:36:11AM +1100, Herbert Xu wrote:
> On Wed, Jan 11, 2012 at 03:00:40AM +0300, Alexey Dobriyan wrote:
> > commit f9e2bca6c22d75a289a349f869701214d63b5060
> > aka "crypto: sha512 - Move message schedule W[80] to static percpu area"
> > created global message schedule area.
> > 
> > If sha512_update will ever be entered twice, hilarity ensures.
> 
> Hmm, do you know why this happens? On the face of it this shouldn't
> be possible as preemption is disabled.

Herbert, I couldn't come up with a single scenario. :-(
But the bug is easy to reproduce.
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