CVE-2021-47504

In the Linux kernel, the following vulnerability has been resolved:
io_uring: ensure task_work gets run as part of cancelations If we
successfully cancel a work item but that work item needs to be processed
through task_work, then we can be sleeping uninterruptibly in
io_uring_cancel_generic() and never process it. Hence we don’t make forward
progress and we end up with an uninterruptible sleep warning. While in
there, correct a comment that should be IFF, not IIF.