tree 53822572d7d19e24aa59cce3d4bdce69075b3621
parent a79b13f24967b68b49aa23eda5fa9eb14d07b3a4
author Dylan Yudaken <dylany@meta.com> 1674317592 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1674541364 +0100

io_uring: fix async accept on O_NONBLOCK sockets

commit a73825ba70c93e1eb39a845bb3d9885a787f8ffe upstream.

Do not set REQ_F_NOWAIT if the socket is non blocking. When enabled this
causes the accept to immediately post a CQE with EAGAIN, which means you
cannot perform an accept SQE on a NONBLOCK socket asynchronously.

By removing the flag if there is no pending accept then poll is armed as
usual and when a connection comes in the CQE is posted.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220324143435.2875844-1-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>