BPF: Failed to attach BPF to device eth0: Cannot allocate memory

Hi,
i am getting below error when running a bpf program(socket filtering) in GKE 1.20 cluster.

Host Info:
OS: Container-Optimized OS(COS)
BUILD_ID=16108.470.1
Kernel: 5.4.120+
BCC Version: 0.16.0-3.el8

Error:
`Traceback (most recent call last):
File "bpf-parser-l7flowmap.py", line 354, in
attach_interfaces_to_sock(iface)
File "bpf-parser-l7flowmap.py", line 251, in attach_interfaces_to_sock
BPF.attach_raw_socket(function_flow_bpf_filter, iface)
File "/usr/lib/python3.6/site-packages/bcc/__init__.py", line 552, in attach_raw_socket
% (dev, errstr))
Exception: Failed to attach BPF to device b'eth0': Cannot allocate memory`

Can someone help me why throwing "Cannot Allocate memory". There is lots of memory available in the host.
Facing this issue only in GKE cluster

Start with bpf-parser-l7flowmap.py at attach_interfaces_to_sock and the BPF.attach_raw_socket call shown in the traceback. Reproduce the failure in the stated GKE 1.20, COS, and kernel 5.4.120+ environment, then investigate why attaching to eth0 reports memory exhaustion despite available host memory; done means documenting the cause and a verified resolution or limitation.

Written by the indexing model from the issue text.