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Sat, 08 Aug 2026 02:57:54 -0700 (PDT) Message-ID: <184112d9aae234d626c8610f5d46bc9a4a81bd46.camel@gmail.com> Subject: Re: [PATCH bpf-next v5 13/14] bpf: Reject tracing/freplace progs for struct_ops with arena args From: Eduard Zingerman To: Kumar Kartikeya Dwivedi , bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Emil Tsalapatis , Tejun Heo , kkd@meta.com, kernel-team@meta.com Date: Sat, 08 Aug 2026 02:57:51 -0700 In-Reply-To: <20260808003938.3486067-14-memxor@gmail.com> References: <20260808003938.3486067-1-memxor@gmail.com> <20260808003938.3486067-14-memxor@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-10 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Sat, 2026-08-08 at 02:39 +0200, Kumar Kartikeya Dwivedi wrote: > Reject tracing and freplace attachments to a target program with arena > context arguments. The struct_ops indirect trampoline converts those > arguments before entering the target, so a generic tracing trampoline > would otherwise expose arena offsets using the target BTF pointer type. >=20 > Signed-off-by: Kumar Kartikeya Dwivedi > --- It appears a similar check is needed for kfuncs with __arena args, let's add as a follow-up. (But we need figure out how to properly handle these args eventually). Acked-by: Eduard Zingerman ...