[GIT PULL] io_uring followup fixes for 5.12-rc4

[Jens Axboe <axboe@kernel.dk>]

Hi Linus,

Was planning on holding these for -rc5, but I think we may as well
flush them out. In this pull request:

- The SIGSTOP change from Eric, so we properly ignore that for
  PF_IO_WORKER threads.

- Disallow sending signals to PF_IO_WORKER threads in general, we're not
  interested in having them funnel back to the io_uring owning task.

- Stable fix from Stefan, ensuring we properly break links for short
  send/sendmsg recv/recvmsg if MSG_WAITALL is set.

- Catch and loop when needing to run task_work before a PF_IO_WORKER
  threads goes to sleep.

Please pull!


The following changes since commit de75a3d3f5a14c9ab3c4883de3471d3c92a8ee78:

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

are available in the Git repository at:

  git://git.kernel.dk/linux-block.git tags/io_uring-5.12-2021-03-21

for you to fetch changes up to 0031275d119efe16711cd93519b595e6f9b4b330:

  io_uring: call req_set_fail_links() on short send[msg]()/recv[msg]() with MSG_WAITALL (2021-03-21 09:41:14 -0600)

----------------------------------------------------------------
io_uring-5.12-2021-03-21

----------------------------------------------------------------
Eric W. Biederman (1):
      signal: don't allow STOP on PF_IO_WORKER threads

Jens Axboe (2):
      signal: don't allow sending any signals to PF_IO_WORKER threads
      io-wq: ensure task is running before processing task_work

Stefan Metzmacher (1):
      io_uring: call req_set_fail_links() on short send[msg]()/recv[msg]() with MSG_WAITALL

 fs/io-wq.c      |  8 ++++++--
 fs/io_uring.c   | 24 ++++++++++++++++++++----
 kernel/signal.c |  6 +++++-
 3 files changed, 31 insertions(+), 7 deletions(-)

-- 
Jens Axboe