linux-kernel - Re: [PATCH] gcc-plugins: Disable GCC plugins for compile test builds

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Message-ID: <202504151342.7362AD8817@keescook>
Date: Tue, 15 Apr 2025 13:43:03 -0700
From: Kees Cook <kees@...nel.org>
To: Mark Brown <broonie@...nel.org>
Cc: Palmer Dabbelt <palmer@...belt.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>, mic@...ikod.net,
	gnoack@...gle.com, Arnd Bergmann <arnd@...db.de>,
	linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] gcc-plugins: Disable GCC plugins for compile test builds

On Tue, Apr 15, 2025 at 09:41:06PM +0100, Mark Brown wrote:
> On Tue, Apr 15, 2025 at 01:26:34PM -0700, Palmer Dabbelt wrote:
> > On Mon, 07 Apr 2025 13:57:32 PDT (-0700), broonie@...nel.org wrote:
> 
> > > In current mainline x86_64 allmodconfig builds done with tuxmake GCC 13
> > > and GCC 14 toolchains (which are Debian ones packaged up into containers)
> > > generate ICEs in landlock:
> 
> > This one's been biting me too.  It manifests for me on gcc-12 and gcc-13
> > (both locally built toolchains off the release branches, cross compiling for
> > RISC-V).
> 
> > Tested-by: Palmer Dabbelt <palmer@...osinc.com>
> 
> Kees has a narrower workaround for this:
> 
>     https://lore.kernel.org/all/20250409151154.work.872-kees@kernel.org/
> 
> It's in -next but not pending-fixes, I'm not sure what the plan is for
> getting this into mainline - Kees?  The commit log mentions getting it
> in for -rc2 so I think the plan is to merge it as a fix.

Yeah, I missed -rc2, and will send it to Linus for -rc3 (with other
stuff) probably tomorrow.

-- 
Kees Cook