If cdns3_gadget_ep_alloc_request() fails, a null pointer dereference occurs. Add a check to prevent it.

Found by code review and compiled on ubuntu 20.04.

Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li lihaoxiang@isrc.iscas.ac.cn --- drivers/usb/cdns3/cdns3-gadget.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 168707213ed9..cc2421a34588 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2659,6 +2659,8 @@ 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) + return -ENOMEM; zlp_request->buf = priv_dev->zlp_buf; zlp_request->length = 0;