linux-kernel - Re: Yet another KPTI regression with 4.14.x series in a VM

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Date:   Fri, 12 Jan 2018 19:51:44 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Laura Abbott <labbott@...hat.com>
cc:     X86 ML <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org
Subject: Re: Yet another KPTI regression with 4.14.x series in a VM

On Fri, 12 Jan 2018, Laura Abbott wrote:
> Fedora got a bug report on 4.14.11 of a panic when booting a
> Fedora guest in a CentOS 6 VM, not reproducible with nopti.
> The issue is still present as of 4.14.13 as well. The only
> report is a panic screenshot
> https://bugzilla.redhat.com/show_bug.cgi?id=1532458
> 
> I've lost track of all the fixes that have been flying around,
> is this a new issue or has a fix not yet made it to stable?

Hmm. Looks kinda familiar, but that has been fixed I think even before
4.4.11. Could you please ask the reported to provide a full console log via
the VM "serial console" ?

Thanks,

	tglx