[GIT PULL] io_uring fixes for 5.12-rc4

[Jens Axboe <axboe@kernel.dk>]

Hi Linus,

Quieter week this time, which was both expected and desired. About half
of the below is fixes for this release, the other half are just fixes in
general. In detail:

- Fix the freezing of IO threads, by making the freezer not send them
  fake signals. Make them freezable by default.

- Like we did for personalities, move the buffer IDR to xarray. Kills
  some code and avoids a use-after-free on teardown.

- SQPOLL cleanups and fixes (Pavel)

- Fix linked timeout race (Pavel)

- Fix potential completion post use-after-free (Pavel)

- Cleanup and move internal structures outside of general kernel view
  (Stefan)

- Use MSG_SIGNAL for send/recv from io_uring (Stefan)

Please pull!


The following changes since commit 58f99373834151e1ca7edc49bc5578d9d40db099:

  io_uring: fix OP_ASYNC_CANCEL across tasks (2021-03-12 09:42:56 -0700)

are available in the Git repository at:

  git://git.kernel.dk/linux-block.git tags/io_uring-5.12-2021-03-19

for you to fetch changes up to de75a3d3f5a14c9ab3c4883de3471d3c92a8ee78:

  io_uring: don't leak creds on SQO attach error (2021-03-18 09:44:35 -0600)

----------------------------------------------------------------
io_uring-5.12-2021-03-19

----------------------------------------------------------------
Jens Axboe (3):
      kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing
      io_uring: allow IO worker threads to be frozen
      io_uring: convert io_buffer_idr to XArray

Pavel Begunkov (8):
      io_uring: fix ->flags races by linked timeouts
      io_uring: fix complete_post use ctx after free
      io_uring: replace sqd rw_semaphore with mutex
      io_uring: halt SQO submission on ctx exit
      io_uring: fix concurrent parking
      io_uring: add generic callback_head helpers
      io_uring: fix sqpoll cancellation via task_work
      io_uring: don't leak creds on SQO attach error

Stefan Metzmacher (3):
      io_uring: imply MSG_NOSIGNAL for send[msg]()/recv[msg]() calls
      io_uring: remove structures from include/linux/io_uring.h
      io_uring: use typesafe pointers in io_uring_task

 fs/io-wq.c               |   6 +-
 fs/io-wq.h               |  10 ++-
 fs/io_uring.c            | 228 ++++++++++++++++++++++++++---------------------
 include/linux/io_uring.h |  25 ------
 kernel/fork.c            |   1 -
 kernel/freezer.c         |   2 +-
 6 files changed, 142 insertions(+), 130 deletions(-)

-- 
Jens Axboe