linux-kernel - Re: [PATCH 3/3] module: Add compile-time check for embedded NUL characters

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Message-ID: <aV9vo7_turBr84bs@black.igk.intel.com>
Date: Thu, 8 Jan 2026 09:49:39 +0100
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: Dan Carpenter <dan.carpenter@...aro.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Daniel Gomez <da.gomez@...nel.org>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Chris Li <sparse@...isli.org>, Eric Biggers <ebiggers@...nel.org>,
	Kees Cook <kees@...nel.org>, Luis Chamberlain <mcgrof@...nel.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Petr Pavlu <petr.pavlu@...e.com>,
	"linux-modules@...r.kernel.org" <linux-modules@...r.kernel.org>,
	Malcolm Priestley <tvboxspy@...il.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil@...nel.org>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>
Subject: Re: [PATCH 3/3] module: Add compile-time check for embedded NUL
 characters

On Fri, Dec 19, 2025 at 08:21:39AM -0800, Luck, Tony wrote:
> On Fri, Dec 19, 2025 at 03:45:42PM +0300, Dan Carpenter wrote:
> > On Fri, Dec 12, 2025 at 02:30:48AM +0900, Daniel Gomez wrote:
> > > Maybe the flag fix just needs to be applied to the evaluation? Other op
> > > structs do the same. But Dan's patch did not implement evaluate. E.g.:
> > > 
> > > static struct symbol_op constant_p_op = {
> > > 	.evaluate = evaluate_to_int_const_expr,
> > > 	.expand = expand_constant_p
> > > };
> > 
> > I was waiting for you to send this as a patch.  I can do it if you
> > need me to.
> 
> Al Viro thought this was wrong. His alternative patch is here:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/viro/sparse.git/commit/?id=2634e39bf02697a18fece057208150362c985992

Sparse still is PITA as of today, can we get some fix (Al's or alternative)
ASAP to be applied and sparse tagged as 0.6.5 so the distros will pack the
new version, please?

-- 
With Best Regards,
Andy Shevchenko