linux-kernel - Re: [PATCH] checkpatch: add warning on %pk instead of %pK usage

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Message-ID: <1486771260.2192.39.camel@perches.com>
Date:   Fri, 10 Feb 2017 16:01:00 -0800
From:   Joe Perches <joe@...ches.com>
To:     "Roberts, William C" <william.c.roberts@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "apw@...onical.com" <apw@...onical.com>,
        Andew Morton <akpm@...ux-foundation.org>
Cc:     "keescook@...omium.org" <keescook@...omium.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH] checkpatch: add warning on %pk instead of %pK usage

On Fri, 2017-02-10 at 23:54 +0000, Roberts, William C wrote:
> > The problem starts to get hairy when we think of how often folks roll their own
> > logging macros (see some small sampling at the end).

It's not just the "hairy" local macros.

In its current form, checkpatch could not find uses like:

	netif_<foo>(x, y, z,
		    "some string with %pk",
		    args);
and
	some_logging_function(arg, "string 1" CONSTANT "string 2", etc...)

if string 2 or CONSTANT had the "%pk" use.

and a bunch of other styles.

This really needs to be verified by the compiler.