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Mon, 15 Jun 2026 08:48:22 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Mon, 15 Jun 2026 08:48:21 -0700 Message-Id: Subject: Re: [PATCH bpf 0/2] bpf: Gate dynptr probe-read kfuncs like helpers From: "Alexei Starovoitov" To: "Nuoqi Gui" , "Alexei Starovoitov" , "Daniel Borkmann" , "Andrii Nakryiko" , "Eduard Zingerman" , "Kumar Kartikeya Dwivedi" Cc: "Martin KaFai Lau" , "Mykyta Yatsenko" , "Shuah Khan" , , , X-Mailer: aerc References: <20260615-f01-07-dynptr-probe-read-cap-v1-0-e626cd61a381@mails.tsinghua.edu.cn> In-Reply-To: <20260615-f01-07-dynptr-probe-read-cap-v1-0-e626cd61a381@mails.tsinghua.edu.cn> On Mon Jun 15, 2026 at 1:31 AM PDT, Nuoqi Gui wrote: > The dynptr probe-read kfuncs are registered as common kfuncs. That lets a > program with the generic kfunc privilege gate call > bpf_probe_read_kernel_dynptr(), while the legacy bpf_probe_read_kernel() > helper is exposed only with CAP_PERFMON and is blocked by kernel-read > lockdown. It's fine as-is. Won't fix. pw-bot: cr