linux-kernel - Re: [PATCH] x86: Disable EXECMEM

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Message-ID: <20250113115151.GDZ4T-VwIq_6ZafRE4@fat_crate.local>
Date: Mon, 13 Jan 2025 12:51:51 +0100
From: Borislav Petkov <bp@...en8.de>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	Mike Rapoport <rppt@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Luis Chamberlain <mcgrof@...nel.org>,
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	Dinh Nguyen <dinguyen@...nel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
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Subject: Re: [PATCH] x86: Disable EXECMEM_ROX support

On Mon, Jan 13, 2025 at 12:29:34PM +0100, Peter Zijlstra wrote:
> On Mon, Jan 13, 2025 at 12:11:16PM +0100, Peter Zijlstra wrote:
> 
> > There's definiltely breakage with that module_writable_address()
> > nonsense in alternative.c that will not be fixed by that patch.
> > 
> > The very simplest thing at this point is to remove:
> > 
> >      select ARCH_HAS_EXECMEM_ROX             if X86_64
> > 
> > and try again next cycle.
> 
> Boris asked I send it as a proper patch, so here goes. Perhaps next time
> let x86 merge x86 code :/

I just love it how this went in without a single x86 maintainer Ack, it broke
a bunch of things and then it is still there instead of getting reverted.

Let's not do this again please.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette