io_uring: fix task leak issue in io_wq_create()

Add missing put_task_struct() in the error path

Cc: stable@vger.kernel.org
Fixes: 0f8baa3 ("io-wq: fully initialize wqe before calling cpuhp_state_add_instance_nocalls()")
Signed-off-by: Penglei Jiang <superman.xpt@gmail.com>
Link: https://lore.kernel.org/r/20250615163906.2367-1-superman.xpt@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: superman-xpt

io_uring/io-wq.c

@@ -1259,8 +1259,10 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
 	atomic_set(&wq->worker_refs, 1);
 	init_completion(&wq->worker_done);
 	ret = cpuhp_state_add_instance_nocalls(io_wq_online, &wq->cpuhp_node);
-	if (ret)
+	if (ret) {
+		put_task_struct(wq->task);
 		goto err;
+	}
 
 	return wq;
 err: