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Date:   Sat, 9 Sep 2017 20:29:52 +0200
From:   Borislav Petkov <>
To:     Linus Torvalds <>
Cc:     Markus Trippelsdorf <>,
        Andy Lutomirski <>,
        Ingo Molnar <>,
        Thomas Gleixner <>,
        Peter Zijlstra <>,
        LKML <>,
        Ingo Molnar <>,
        Tom Lendacky <>
Subject: Re: Current mainline git (24e700e291d52bd2) hangs when building e.g.

On Sat, Sep 09, 2017 at 11:26:27AM -0700, Linus Torvalds wrote:
> But the fact that that fixes it for you does indicate that it's not
> just a stale TLB entry or something, it really is some CPU using page
> tables after they have been free'd and been re-allocated to something
> else (and *then* they may point to garbage).

Cool, I was trying to think of a good use case how we'd hit that. I
guess you just gave one. :)



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