The mv_u3d_build_trb_one() will return NULL when kzalloc() fails, fix
possible null-ptr-deref by add check for mv_u3d_build_trb_one().
Fixes: 3d4eb9dfa3e8 ("usb: gadget: mv: Add USB 3.0 device driver for Marvell PXA2128 chip.")
Signed-off-by: Yi Yang <yiyang13@xxxxxxxxxx>
---
drivers/usb/gadget/udc/mv_u3d_core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index 062f43e146aa..c882c377c4f4 100644
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -417,6 +417,8 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
*/
if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) {
trb = mv_u3d_build_trb_one(req, &count, &dma);
+ if (!trb)
+ return -ENOMEM;
list_add_tail(&trb->trb_list, &req->trb_list);
req->trb_head = trb;
req->trb_count = 1;
--
2.25.1
