I've updated my fedora linux with dnf update to kernel version Linux 5.16.7-200.fc35.x86_64 x86_64 and am now getting a EPERM/permission denied error for a call to io_uring_queue_init, even when calling my program as root.
I am at a total loss, is this a bug in the kernel build or do I need to add some init code?
It was selinux, I solved it by disabling selinux.
The upgrade came with kernel 5.16:
https://www.phoronix.com/scan.php?page=news_item&px=SELinux-IO_uring-Linux-5.16