From 0f8da75b51ac863b9435368bd50691718cc454b0 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Tue, 12 Apr 2022 15:24:43 +0100 Subject: io_uring: fix assign file locking issue io-wq work cancellation path can't take uring_lock as how it's done on file assignment, we have to handle IO_WQ_WORK_CANCEL first, this fixes encountered hangs. Fixes: 6bf9c47a3989 ("io_uring: defer file assignment") Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/0d9b9f37841645518503f6a207e509d14a286aba.1649773463.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- fs/io_uring.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'fs') diff --git a/fs/io_uring.c b/fs/io_uring.c index 38e62b1c6297..8a931eb8a3a6 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7277,16 +7277,18 @@ static void io_wq_submit_work(struct io_wq_work *work) if (timeout) io_queue_linked_timeout(timeout); - if (!io_assign_file(req, issue_flags)) { - err = -EBADF; - work->flags |= IO_WQ_WORK_CANCEL; - } /* either cancelled or io-wq is dying, so don't touch tctx->iowq */ if (work->flags & IO_WQ_WORK_CANCEL) { +fail: io_req_task_queue_fail(req, err); return; } + if (!io_assign_file(req, issue_flags)) { + err = -EBADF; + work->flags |= IO_WQ_WORK_CANCEL; + goto fail; + } if (req->flags & REQ_F_FORCE_ASYNC) { bool opcode_poll = def->pollin || def->pollout; -- cgit v1.2.3