linux-kernel - Re: [GIT PULL] hwmon updates for v5.20

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Date:   Sun, 7 Aug 2022 22:34:41 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Ingo Molnar <mingo@...nel.org>, Kees Cook <keescook@...omium.org>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] hwmon updates for v5.20

On Sun, Aug 07, 2022 at 09:45:08AM -0700, Linus Torvalds wrote:
> Added Kees - this *looks* like it's a compiler bug.
> 
> On Sun, Aug 7, 2022 at 3:07 AM Ingo Molnar <mingo@...nel.org> wrote:
> >
> > Just a quick build regression report, i386 allmodconfig fails to build due
> > to a 'string overread' compiler warning in drivers/hwmon/lm90.o:
> 
> I tried to see it here with gcc-12.1, but it's not triggering, so it's
> presumably compiler-dependent.
> 

I don't see it with gcc 11.3. either, but I do indeed see the problem
with gcc 11.2.

The problem is in lm90_detect_nuvoton() which returns ERR_PTR(-ENODEV)
instead of NULL on error. I'll send a patch.

Thanks, and sorry for the problem.

Guenter