io_uring fixes for 6.12-stable

Hi Greg,

Here are io_uring fixes for 6.12-stable. They were waiting on the io_uring pull for 7.4-rc, which Linus has now merged.

They apply on top of v6.12.116 with the current queue-6.12 applied (stable-queue 0ae08d01c389). They don't depend on anything in the queue, and apply to v6.12.116 alone as well.

The io_uring series I sent earlier this week is already in queue-6.12, these go on top of that.

Please take patches 1-3 together. Patch 2 closes a race that patch 1 opens up, and patch 3 fixes a WARN_ON_ONCE() that patch 2 introduces on SQPOLL thread exit.

Patches 1, 6, 8 and 9 needed changes to apply to 6.12, the [axboe: ...] note at the end of each says what was changed.

Chris Mason (1):
io_uring/cancel: drop sqd->lock while SQPOLL waits

Jens Axboe (3):
io_uring/sqpoll: don't attach to a thread that is canceling io_uring/poll: don't poll a writer for a read side hangup io_uring/poll: don't poll a writer for urgent data

Shakeel Butt (1):
io_uring/sqpoll: do the return-to-userspace work in the SQPOLL thread

Shang En Sim (2):
io_uring/cancel: count all requests that a CANCEL_ALL cancels io_uring/poll: cancel all matching requests in one pass

Shuai Liu (1):
io_uring/sqpoll: don't set IO_SQ_THREAD_SHOULD_STOP on thread exit

Yuansheng Yang (1):
io_uring/rsrc: hold uring_lock across index-alloc put_user

 io_uring/cancel.c   |  3 +-
 io_uring/io_uring.c | 23 +++++++++++++-
 io_uring/poll.c     | 77 +++++++++++++++++++++++++++++++++++++++------
 io_uring/rsrc.c     | 21 ++++++++++---
 io_uring/sqpoll.c   | 26 ++++++++++++++-
 5 files changed, 132 insertions(+), 18 deletions(-)

2.56.0