With the latest iproute2 (built from master, 'ip -V' reports
iproute2-ss200330) when I try to run tc_l2_redirect.sh
I get errors like the following. What am I missing?

(full transcript of output from run is in the run.out attachment)

  :
+ tc filter add dev ve2 ingress bpf da obj ./tc_l2_redirect_kern.o sec l2_to_iptun_ingress_forward

BTF debug data section '.BTF' rejected: Invalid argument (22)!
 - Length:       3554
Verifier analysis:

magic: 0xeb9f
version: 1
flags: 0x0
hdr_len: 24
type_off: 0
type_len: 984
str_off: 984
str_len: 2546
btf_total_size: 3554
[1] PTR (anon) type_id=2
[2] STRUCT __sk_buff size=184 vlen=32
        len type_id=3 bits_offset=0
        pkt_type type_id=3 bits_offset=32
        mark type_id=3 bits_offset=64
        queue_mapping type_id=3 bits_offset=96
        protocol type_id=3 bits_offset=128
        vlan_present type_id=3 bits_offset=160
        vlan_tci type_id=3 bits_offset=192
        vlan_proto type_id=3 bits_offset=224
         :
         :