[Memory leak] How to free memory when reading ringbuf/perfbuf data using ctypes.cast function?

Hello!

I am using ring buffers to communicate between TC kernel-space programs and Python user-space program. In the user-space program, I'm using `ctypes.cast` to read and handle the data sent by the kernel-space program.

I I noticed that when using this method, memory is not freed even after the callback function's return. Over time, the python program accumulates a lot of memory. Anyone have an idea on how to avoid this?

Thanks in advance,
Raouf

Start with the ringbuf/perfbuf callback and the ctypes.cast usage described in the issue, then reproduce the reported memory growth in a Python user-space program. Done means identifying whether the accumulation comes from the callback or binding behavior and documenting or fixing how memory is released.

Written by the indexing model from the issue text.