linux-kernel - Re: WARNING: kernel stack regs at ffffc9000024fea8 in udevadm:92 has bad 'bp' value 00007fffc4614d30

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Message-ID: <20170420133021.cxf6mb4tzhjwu5el@treble>
Date:   Thu, 20 Apr 2017 08:30:21 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     x86-ml <x86@...nel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: WARNING: kernel stack regs at ffffc9000024fea8 in udevadm:92 has
 bad 'bp' value 00007fffc4614d30

On Thu, Apr 20, 2017 at 01:06:10PM +0200, Borislav Petkov wrote:
> Hi,
> 
> the splat below started appearing on one of the boxes here with
> rc7+tip/master from yesterday.
> 
> Ideas?

Thanks for reporting it.  This is another false positive.  It unwinded
from an interrupt which came in right after calling into C code, but
before it could set up the frame pointer.  This needs another unwinder
check.

-- 
Josh