]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
io_uring: pin context while queueing deferred tw
authorPavel Begunkov <asml.silence@gmail.com>
Wed, 4 Jan 2023 01:34:02 +0000 (01:34 +0000)
committerJens Axboe <axboe@kernel.dk>
Wed, 4 Jan 2023 02:03:28 +0000 (19:03 -0700)
commit9ffa13ff78a0a55df968a72d6f0ebffccee5c9f4
tree3576e12a99775bf257075621191860613552fd4b
parentaf82425c6a2d2f347c79b63ce74fca6dc6be157f
io_uring: pin context while queueing deferred tw

Unlike normal tw, nothing prevents deferred tw to be executed right
after an tw item added to ->work_llist in io_req_local_work_add(). For
instance, the waiting task may get waken up by CQ posting or a normal
tw. Thus we need to pin the ring for the rest of io_req_local_work_add()

Cc: stable@vger.kernel.org
Fixes: c0e0d6ba25f18 ("io_uring: add IORING_SETUP_DEFER_TASKRUN")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1a79362b9c10b8523ef70b061d96523650a23344.1672795998.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
io_uring/io_uring.c