Re: [PATCH bpf-next v2 2/2] selftests/bpf: add tests for attaching invalid fd

Kohei Enju [off-list ref] writes:

Add test cases for situations where adding the following types of file
descriptors to a cpumap entry should fail:
- Non-BPF file descriptor (expect -EINVAL)
- Nonexistent file descriptor (expect -EBADF)

Also tighten the assertion for the expected error when adding a
non-BPF_XDP_CPUMAP program to a cpumap entry.

Signed-off-by: Kohei Enju <redacted>

Reviewed-by: Toke Høiland-Jørgensen <redacted>