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Fri, 18 Sep 2026 05:59:02 -0700 (PDT) Received: from localhost.localdomain ([2001:af0:8000:1409:193:86:92:181]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49fbd1d0d0bsm153252385e9.1.2026.09.18.05.59.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Sep 2026 05:59:02 -0700 (PDT) Date: Fri, 18 Sep 2026 14:59:00 +0200 From: Michal =?utf-8?Q?Koutn=C3=BD?= To: Sebastian Andrzej Siewior Cc: cgroups@vger.kernel.org, Tejun Heo , Johannes Weiner Subject: Re: [PATCH] cgroup: Use %p for pointer formatting Message-ID: References: <20260918104852.1p2fz_-_@linutronix.de> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="hol7rf6ipdlfvwqx" Content-Disposition: inline In-Reply-To: <20260918104852.1p2fz_-_@linutronix.de> --hol7rf6ipdlfvwqx Content-Type: text/plain; protected-headers=v1; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH] cgroup: Use %p for pointer formatting MIME-Version: 1.0 On Fri, Sep 18, 2026 at 12:48:52PM +0200, Sebastian Andrzej Siewior wrote: > Since commit ad67b74d2469d ("printk: hash addresses printed with > %p") pointers are hashed by default and the behaviour can be controller > by `hash_pointers' boot argument. > The policy on %p is to not introduce new ones. %pK should be here? I assume it based on: | This is because %pK checks are done at read() time rather than open() | ... | The correct long-term solution is to do the permission checks at | open() time. of Documentation/admin-guide/sysctl/kernel.rst-time > Removing %pK makes it possible to remove its handling from the library. This is also a good sell. But I see there are a few of them still here and there. >=20 > Signed-off-by: Sebastian Andrzej Siewior > --- > kernel/cgroup/debug.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > Nevertheless, Acked-by: Michal Koutn=FD --hol7rf6ipdlfvwqx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJEEABYKADkWIQRCE24Fn/AcRjnLivR+PQLnlNv4CAUCaq01hxsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQfj0C55Tb+AilwgD/Sk7Ba54CIc6wia7ML1h2 cW1PQW/MUJiO01WGOOqPxyIA/jZ7e3RV3k12q5svEhRo/llH6pXXBZdQBmlUqViv s1sI =zDX/ -----END PGP SIGNATURE----- --hol7rf6ipdlfvwqx--