[PATCH 6.1.y] Fix memory leak in io_wq_create() on success path

[Chen Xiaokun]

The commit 657ca82526d0 introduced a temporary allowed_mask cpumask in
io_wq_create(), which was freed only on the error path.  This caused a
memory leak of cpumask_size() bytes on every successful io_wq_create().

Fixes: 657ca82526d0 ("io_uring/io-wq: inherit cpuset of cgroup in io worker")
Signed-off-by: Chen Xiaokun <shinnkka1@xxxxxxxxx>
---
 io_uring/io-wq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c
index 66fdd69fd6cb..34a1a9067cc2 100644
--- a/io_uring/io-wq.c
+++ b/io_uring/io-wq.c
@@ -1218,6 +1218,7 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
 	wq->task = get_task_struct(data->task);
 	atomic_set(&wq->worker_refs, 1);
 	init_completion(&wq->worker_done);
+	free_cpumask_var(allowed_mask);
 	return wq;
 err:
 	io_wq_put_hash(data->hash);
-- 
2.55.0