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Open Source and information security mailing list archives
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Date: Sat, 9 Sep 2017 20:29:52 +0200 From: Borislav Petkov <bp@...en8.de> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Markus Trippelsdorf <markus@...ppelsdorf.de>, Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Peter Zijlstra <peterz@...radead.org>, LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...hat.com>, Tom Lendacky <thomas.lendacky@....com> Subject: Re: Current mainline git (24e700e291d52bd2) hangs when building e.g. perf 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. :) Thx. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.
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