linux-kernel - Re: [PATCH] ARM: mm: Don't use %pK through printk

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Message-ID: <Z7RgpaLeIPMQ7kgp@shell.armlinux.org.uk>
Date: Tue, 18 Feb 2025 10:27:49 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: mm: Don't use %pK through printk

On Mon, Feb 17, 2025 at 08:38:37AM +0100, Thomas Weißschuh wrote:
> Restricted pointers ("%pK") are not meant to be used through printk().
> It can unintentionally expose security sensitive, raw pointer values.
> 
> Use regular pointer formatting instead.

... which means that the warning is pointless because no one can debug
it when someone reports that this has fired.

While I get the security issue, changing this is severely harmful to
fixing problems should this warning fire.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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