Date: Mon, 26 Dec 2016 19:21:44 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
cc: Markus Trippelsdorf <markus@trippelsdorf.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Borislav Petkov <bp@alien8.de>
Subject: Re: [GIT pull] smp/hotplug: Removal of notifiers
In-Reply-To: <53e3b52b-f353-63c8-f96f-649d754596bc@oracle.com>
Message-ID: <alpine.DEB.2.20.1612261918360.3605@nanos>
References: <alpine.DEB.2.20.1612251431340.3605@nanos> <20161226074530.GA297@x4> <20161226110600.GB297@x4> <20161226154502.GA287@x4> <53e3b52b-f353-63c8-f96f-649d754596bc@oracle.com>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 822
Lines: 23

On Mon, 26 Dec 2016, Boris Ostrovsky wrote:
> On 12/26/2016 10:45 AM, Markus Trippelsdorf wrote:
> > The comment in arch/x86/kernel/cpu/mcheck/mce_amd.c says:
> >
> > 1384  * mcheck_init_device should be inited before threshold_init_device to
> > 1385  * initialize mce_device, otherwise a NULL ptr dereference will cause panic.

That's not changed by this commit.

> My nightly test hit this as well. AMD only, Intel passed. I haven't
> verified whether commit that Markus implicated is the one that caused
> this but it's the same BUG signature (but possibly slightly different stack)
> 
> [    1.554351] smpboot: CPU0: AMD Engineering Sample (family: 0x10,
> model: 0x4, stepping: 0x1)
> ...

Is there anything interesting error message before the BUG hits? I'll try
to reproduce on a AMD box tomorrow.

Thanks,

	tglx