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Mon, 13 Jul 2026 05:51:03 -0700 (PDT) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Mon, 13 Jul 2026 14:51:01 +0200 To: Ihor Solodrai Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Eduard Zingerman , Kumar Kartikeya Dwivedi , Tejun Heo , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH bpf v2 1/2] bpf: Fix tracing of kfuncs with implicit args Message-ID: References: <20260710192940.3020280-1-ihor.solodrai@linux.dev> <20260710192940.3020280-2-ihor.solodrai@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260710192940.3020280-2-ihor.solodrai@linux.dev> On Fri, Jul 10, 2026 at 12:29:39PM -0700, Ihor Solodrai wrote: SNIP > + > int bpf_check_attach_target(struct bpf_verifier_log *log, > const struct bpf_prog *prog, > const struct bpf_prog *tgt_prog, > @@ -19121,8 +19159,8 @@ int bpf_check_attach_target(struct bpf_verifier_log *log, > if (prog_extension && > btf_check_type_match(log, prog, btf, t)) > return -EINVAL; > - t = btf_type_by_id(btf, t->type); > - if (!btf_type_is_func_proto(t)) > + t = btf_attach_func_proto(log, btf, btf_id); > + if (!t || !btf_type_is_func_proto(t)) > return -EINVAL; > > if ((prog->aux->saved_dst_prog_type || prog->aux->saved_dst_attach_type) && > @@ -19407,8 +19445,8 @@ int bpf_check_attach_btf_id_multi(struct btf *btf, struct bpf_prog *prog, u32 bt > return -EINVAL; > if (!btf_type_is_func(t)) > return -EINVAL; the btf_type_is_func check is now part of btf_attach_func_proto, so I think we can remove this one jirka > - t = btf_type_by_id(btf, t->type); > - if (!btf_type_is_func_proto(t)) > + t = btf_attach_func_proto(NULL, btf, btf_id); > + if (!t || !btf_type_is_func_proto(t)) > return -EINVAL; > err = btf_distill_func_proto(NULL, btf, t, tname, &tgt_info->fmodel); > if (err < 0) > -- > 2.55.0 > >