bug: frozen map leaks

Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> · Fri, 2 Oct 2020 15:32:01 -0700

Hi,

after successful test_progs run I see a bunch of leaked maps:
# bpftool m s
3: array  name iterator.rodata  flags 0x480
    key 4B  value 98B  max_entries 1  memlock 8192B
    btf_id 4  frozen
9: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 145B  max_entries 1  memlock 8192B
    btf_id 13  frozen
12: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 144B  max_entries 1  memlock 8192B
    btf_id 14  frozen
13: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 85B  max_entries 1  memlock 8192B
    btf_id 15  frozen
14: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 45B  max_entries 1  memlock 8192B
    btf_id 16  frozen
15: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 40B  max_entries 1  memlock 8192B
    btf_id 17  frozen
17: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 55B  max_entries 1  memlock 8192B
    btf_id 18  frozen
19: array  name bpf_iter.rodata  flags 0x480
    key 4B  value 14B  max_entries 1  memlock 8192B
    btf_id 19  frozen

Andrii,
I suspect it's due to libbpf doing BPF_PROG_BIND_MAP now.

Stanislav,
could you take a look ?

Thanks!