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[34.125.53.210]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c4cc96ca7a9sm8744729a12.25.2026.01.08.13.45.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jan 2026 13:45:52 -0800 (PST) Date: Thu, 8 Jan 2026 21:45:47 +0000 From: Carlos Llamas To: Thomas =?iso-8859-1?Q?Wei=DFschuh?= Cc: Greg Kroah-Hartman , Arve =?iso-8859-1?B?SGr4bm5lduVn?= , Todd Kjos , Christian Brauner , Alice Ryhl , linux-kernel@vger.kernel.org Subject: Re: [PATCH] binder: don't use %pK through printk Message-ID: References: <20260107-restricted-pointers-binder-v1-1-181018bf3812@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260107-restricted-pointers-binder-v1-1-181018bf3812@linutronix.de> On Wed, Jan 07, 2026 at 03:29:50PM +0100, Thomas Weißschuh wrote: > In the past %pK was preferable to %p as it would not leak raw pointer > values into the kernel log. Since commit ad67b74d2469 ("printk: hash > addresses printed with %p") the regular %p has been improved to avoid > this issue. Furthermore, restricted pointers ("%pK") were never meant > to be used through printk(). They can still unintentionally leak raw > pointers or acquire sleeping locks in atomic contexts. > > Switch to the regular pointer formatting which is safer and > easier to reason about. > > There are still a few users of %pK left, but these use it through > seq_file, for which its usage is safe. > > Signed-off-by: Thomas Weißschuh > --- Thanks Thomas, Acked-by: Carlos Llamas