linux-kernel - Re: [tip:x86/kaslr] x86, relocs: Add more per-cpu gold special cases

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Message-ID: <20131016065630.GC22509@gmail.com>
Date:	Wed, 16 Oct 2013 08:56:30 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Michael Davidson <md@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/kaslr] x86, relocs: Add more per-cpu gold special cases


* Kees Cook <keescook@...omium.org> wrote:

> >> > The failure I saw triggered with fairly modern userspace:
> >> >
> >> >  GNU ld version 2.23.52.0.1-9.fc19 20130226
> >> >
> >> >  gcc version 4.8.1 20130603 (Red Hat 4.8.1-1) (GCC)
> >>
> >> Can you try with the gold linker?  When not using Gold, I can produce 
> >> a similar crash with GNU ld ver 2.23.2 but not 2.22.
> >
> > I'm not set up for Gold - but maybe others can try your experiment.
> >
> > If you can see/reproduce the 2.23 crash then maybe that fix will work 
> > for my testcase as well.
> 
> I haven't isolated the problem with 2.23 yet, but I'll start digging.

I've excluded tip:x86/kaslr from tip:master meanwhile.

Thanks,

	Ingo
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