HID: nintendo: check the return value of alloc_workqueue()

The function alloc_workqueue() in nintendo_hid_probe() can fail, but
there is no check of its return value. To fix this bug, its return value
should be checked with new error handling code.

Fixes: c4eae84feff3e ("HID: nintendo: add rumble support")
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Silvan Jegen <s.jegen@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
index b6a9a0f..2204de8 100644 (file)
--- a/drivers/hid/hid-nintendo.c
+++ b/drivers/hid/hid-nintendo.c
@@ -2128,6 +2128,10 @@ static int nintendo_hid_probe(struct hid_device *hdev,
        spin_lock_init(&ctlr->lock);
        ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq",
                                             WQ_FREEZABLE | WQ_MEM_RECLAIM, 0);
+       if (!ctlr->rumble_queue) {
+               ret = -ENOMEM;
+               goto err;
+       }
        INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker);
 
        ret = hid_parse(hdev);