The cdns2_gadget_ep_alloc_request() will return NULL when kzalloc() fails,
fix possible null-ptr-deref by check return value.
Fixes: 3eb1f1efe204 ("usb: cdns2: Add main part of Cadence USBHS driver")
Signed-off-by: Yi Yang <yiyang13@xxxxxxxxxx>
---
drivers/usb/gadget/udc/cdns2/cdns2-gadget.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c
index 62fce42ef2da..c06a50af268e 100644
--- a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c
+++ b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c
@@ -1724,6 +1724,10 @@ static int cdns2_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,
struct cdns2_request *preq;
zlp_request = cdns2_gadget_ep_alloc_request(ep, GFP_ATOMIC);
+ if (!zlp_request) {
+ spin_unlock_irqrestore(&pdev->lock, flags);
+ return -ENOMEM;
+ }
zlp_request->buf = pdev->zlp_buf;
zlp_request->length = 0;
--
2.25.1
