From: Pavel Begunkov <asml.silence@xxxxxxxxx> commit 9c6882608bce249a8918744ecdb65748534e3f17 upstream. When we use delayed_work for fallback execution of requests, current will be not of the submitter task, and so checks in io_req_task_submit() may not behave as expected. Currently, it leaves inline completions not flushed, so making io_ring_exit_work() to hang. Use the submitter task for all those checks. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Link: https://lore.kernel.org/r/cb413c715bed0bc9c98b169059ea9c8a2c770715.1625881431.git.asml.silence@xxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2023,7 +2023,7 @@ static void __io_req_task_submit(struct /* ctx stays valid until unlock, even if we drop all ours ctx->refs */ mutex_lock(&ctx->uring_lock); - if (!(current->flags & PF_EXITING) && !current->in_execve) + if (!(req->task->flags & PF_EXITING) && !req->task->in_execve) __io_queue_sqe(req); else __io_req_task_cancel(req, -EFAULT);
