linux-kernel - Re: [PATCH] pstore/blk: Use "%lu" to format unsigned long

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Message-ID: <202111151648.0498D0AE@keescook>
Date:   Mon, 15 Nov 2021 16:49:18 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Tony Luck <tony.luck@...el.com>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pstore/blk: Use "%lu" to format unsigned long

On Mon, Nov 15, 2021 at 08:58:51AM +0100, Geert Uytterhoeven wrote:
> Hi Kees,
> 
> On Tue, Jun 29, 2021 at 11:12 PM Kees Cook <keescook@...omium.org> wrote:
> > On Tue, 29 Jun 2021 12:37:00 +0200, Geert Uytterhoeven wrote:
> > > On 32-bit:
> > >
> > >     fs/pstore/blk.c: In function ‘__best_effort_init’:
> > >     include/linux/kern_levels.h:5:18: warning: format ‘%zu’ expects argument of type ‘size_t’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
> > >       5 | #define KERN_SOH "\001"  /* ASCII Start Of Header */
> > >         |                  ^~~~~~
> > >     include/linux/kern_levels.h:14:19: note: in expansion of macro ‘KERN_SOH’
> > >        14 | #define KERN_INFO KERN_SOH "6" /* informational */
> > >         |                   ^~~~~~~~
> > >     include/linux/printk.h:373:9: note: in expansion of macro ‘KERN_INFO’
> > >       373 |  printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
> > >         |         ^~~~~~~~~
> > >     fs/pstore/blk.c:314:3: note: in expansion of macro ‘pr_info’
> > >       314 |   pr_info("attached %s (%zu) (no dedicated panic_write!)\n",
> > >         |   ^~~~~~~
> >
> > Applied to for-next/pstore, thanks!
> 
> Thanks!
> 
> > [1/1] pstore/blk: Use "%lu" to format unsigned long
> >       https://git.kernel.org/kees/c/c5d4fb2539ca
> 
> Looks like this still hasn't made upstream, although it has been in
> linux-next since the end of June?  The issue is still present (and
> now an error with -Werror), but hidden due to commit d07f3b081ee63226
> ("mark pstore-blk as broken").

Argh, I didn't notice that d07f3b081ee63226 actually landed upstream. It
was not supposed to land since pstore-blk got fixed before the merge
window. Bleh. I will try to get this all sorted out.

-Kees

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

-- 
Kees Cook