On Thu, Sep 24, 2026 at 01:26:36PM +0200, Jiri Olsa wrote: > seems valid to me, could we just check for these two print helpers in > helper_uses_vmlinux_btf ?
Yes, that is what the series does since v2 (now v3, patch 3/9): https://lore.kernel.org/bpf/[email protected]/ helper_uses_vmlinux_btf() also matches BPF_FUNC_snprintf_btf and BPF_FUNC_seq_printf_btf, so the verifier loads the vmlinux BTF when a program calls either of them, and the runtime peek in bpf_btf_printf_prepare() then always finds it. Tested with a raw_tp program calling bpf_snprintf_btf() as the first BTF user after boot. Thanks, Jay
