Return -ENOTSUPP if tracing BPF program is attempted to be attached with
specified attach_btf_obj_fd pointing to non-kernel (neither vmlinux nor
module) BTF object. This scenario might be supported in the future and isn't
outright invalid, so -EINVAL isn't the most appropriate error code.
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20201208064326.667389-1-andrii@kernel.org
if (IS_ERR(attach_btf))
return -EINVAL;
if (!btf_is_kernel(attach_btf)) {
+ /* attaching through specifying bpf_prog's BTF
+ * objects directly might be supported eventually
+ */
btf_put(attach_btf);
- return -EINVAL;
+ return -ENOTSUPP;
}
}
} else if (attr->attach_btf_id) {