From: Chen Ridong <chenridong@xxxxxxxxxx>
The cdns3_gadget_ep_alloc_request functions may return NULL
when memory is out of use. To void possible null_ptr_deref,
return ENOMEM when cdns3_gadget_ep_alloc_request returns NULL.
Signed-off-by: Chen Ridong <chenridong@xxxxxxxxxx>
---
drivers/usb/cdns3/cdns3-gadget.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index fd1beb10bba7..982e8e0759e8 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -2657,6 +2657,10 @@ static int cdns3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,
struct cdns3_request *priv_req;
zlp_request = cdns3_gadget_ep_alloc_request(ep, GFP_ATOMIC);
+ if (!zlp_request) {
+ spin_unlock_irqrestore(&priv_dev->lock, flags);
+ return -ENOMEM;
+ }
zlp_request->buf = priv_dev->zlp_buf;
zlp_request->length = 0;
--
2.34.1
