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Date: Fri, 17 Nov 2017 17:54:03 -0800
From: Patrick McLean <chutzpah@...too.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Kees Cook <keescook@...omium.org>, Emese Revfy <re.emese@...il.com>,
Al Viro <viro@...iv.linux.org.uk>, Bruce Fields <bfields@...hat.com>,
"Darrick J. Wong" <darrick.wong@...cle.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
stable <stable@...r.kernel.org>,
Thorsten Leemhuis <regressions@...mhuis.info>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Subject: Re: [nfsd4] potentially hardware breaking regression in 4.14-rc and
4.13.11
On 2017-11-17 04:55 PM, Linus Torvalds wrote:
> On Fri, Nov 17, 2017 at 4:27 PM, Patrick McLean <chutzpah@...too.org> wrote:
>>
>> I am still getting the crash at d9e12200852d, I figured I would
>> double-check the "good" and "bad" kernels before starting a full bisect.
>
> .. but without GCC_PLUGIN_RANDSTRUCT it's solid?
Yes, without GCC_PLUGIN_RANDSTRUCT it's solid.
> Kees removed even the baseline "randomize pure function pointer
> structures", so at that commit, nothing should be randomized.
>
> But maybe the plugin code itself ends up confusing gcc somehow?
>
> Even when it doesn't actually do that "relayout_struct()" on the
> structure, it always does those TYPE_ATTRIBUTES() games.
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