From: Pavel Begunkov asml.silence@gmail.com
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@vger.kernel.org Signed-off-by: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/cb413c715bed0bc9c98b169059ea9c8a2c770715.162588143... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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);