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From:   Arvind Sankar <nivedita@alum.mit.edu>
Date:   Mon, 13 Jan 2020 23:17:25 -0500
To:     Borislav Petkov <bp@alien8.de>
Cc:     Arvind Sankar <nivedita@alum.mit.edu>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>,
        Thomas Lendacky <Thomas.Lendacky@amd.com>,
        Michael Matz <matz@suse.de>
Subject: Re: [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve
 to S_REL
Message-ID: <20200114041725.GC2536335@rani.riverdale.lan>
References: <20200110202349.1881840-1-nivedita@alum.mit.edu>
 <20200110203828.GK19453@zn.tnic>
 <20200110205028.GA2012059@rani.riverdale.lan>
 <20200111130243.GA23583@zn.tnic>
 <20200111172047.GA2688392@rani.riverdale.lan>
 <20200113134306.GF13310@zn.tnic>
 <20200113161310.GA191743@rani.riverdale.lan>
 <20200113163855.GK13310@zn.tnic>
 <20200113175937.GA428553@rani.riverdale.lan>
 <20200113180826.GN13310@zn.tnic>
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On Mon, Jan 13, 2020 at 07:08:26PM +0100, Borislav Petkov wrote:
> On Mon, Jan 13, 2020 at 12:59:38PM -0500, Arvind Sankar wrote:
> > How is "breaks with binutils before version 2.23" not clear enough? It
> 
> Nevermind, I'll write it myself if/when I end up applying some version
> of it. I've wasted enough time trying to get my point across.
> 

You're wasting time, because you're not _listening_ to the other guy.
There is nothing special about how to repro this bug. It can be repro'd
by building binutils-2.21.1 from source, it can be repro'd by building
with a distro that packaged 2.21 -- such as OpenSUSE 12.1 [1], it can be
repro'd by Mauro doing an Android build [2].

The common thread in all that, is that the kernel is being built with a
binutils prior to version 2.23, which is what is noted in the commit log
as it stands.

[1] https://lore.kernel.org/lkml/20200113233829.GB2000869@rani.riverdale.lan/
[2] https://lore.kernel.org/lkml/CAEQFVGbWKf2ksMrMmtymewArSF=ztNgeuieEQ3wvKrX1r759Aw@mail.gmail.com/