From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Michael Neuling <mikey@neuling.org>
Cc: mikey@neuling.org, sam@mendozajonas.com, linuxppc-dev@lists.ozlabs.org
Subject: Re: powepc: Clear PCR on boot
Date: Mon, 21 May 2018 19:55:56 +1000 (AEST) [thread overview]
Message-ID: <40qDgJ229mz9s31@ozlabs.org> (raw)
In-Reply-To: <20180518013742.24095-1-mikey@neuling.org>
On Fri, 2018-05-18 at 01:37:42 UTC, Michael Neuling wrote:
> Clear the PCR on boot to ensure we are not running in a compat mode.
>
> We've seen this cause problems when a crash (and kdump) occurs while
> running compat mode guests. The kdump kernel then runs with the PCR
> set and causes problems. The symptom in the kdump kernel (also seen in
> petitboot after fast-reboot) is early userspace programs taking
> sigills on newer instructions (seen in libc).
>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> Cc: <stable@vger.kernel.org>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/faf37c44a105f3608115785f17cbbf
cheers
prev parent reply other threads:[~2018-05-21 9:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-18 1:37 [PATCH] powepc: Clear PCR on boot Michael Neuling
2018-05-21 9:55 ` Michael Ellerman [this message]
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