Merge tag 'io_uring-5.11-2020-12-23' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "All straight fixes, or a prep patch for a fix, either bound for stable
  or fixing issues from this merge window. In particular:

   - Fix new shutdown op not breaking links on failure

   - Hold mm->mmap_sem for mm->locked_vm manipulation

   - Various cancelation fixes (me, Pavel)

   - Fix error path potential double ctx free (Pavel)

   - IOPOLL fixes (Xiaoguang)"

* tag 'io_uring-5.11-2020-12-23' of git://git.kernel.dk/linux-block:
  io_uring: hold uring_lock while completing failed polled io in io_wq_submit_work()
  io_uring: fix double io_uring free
  io_uring: fix ignoring xa_store errors
  io_uring: end waiting before task cancel attempts
  io_uring: always progress task_work on task cancel
  io-wq: kill now unused io_wq_cancel_all()
  io_uring: make ctx cancel on exit targeted to actual ctx
  io_uring: fix 0-iov read buffer select
  io_uring: close a small race gap for files cancel
  io_uring: fix io_wqe->work_list corruption
  io_uring: limit {io|sq}poll submit locking scope
  io_uring: inline io_cqring_mark_overflow()
  io_uring: consolidate CQ nr events calculation
  io_uring: remove racy overflow list fast checks
  io_uring: cancel reqs shouldn't kill overflow list
  io_uring: hold mmap_sem for mm->locked_vm manipulation
  io_uring: break links on shutdown failure

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