Linux 5.6 io_uring Cred Refcount Overflow Exploit

Linux versions 5.6 and above appear to suffer from a cred refcount overflow when handling approximately 39 gigabytes of memory usage via iouring. Linux =5.6: cred refcount overflow at 39 GiB memory usage via iouring see also my related prior bug reports about overflowing refcounts with lots of RA...