The function driver may try to enable an unconfigured endpoint. This
check make sure that we do not attempt to access a NULL descriptor and
crash.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Thinh Nguyen <thinhn@xxxxxxxxxxxx>
---
drivers/usb/dwc3/gadget.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 7f97856e6b20..00f8f079bbf2 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -619,6 +619,9 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
u32 reg;
int ret;
+ if (!desc)
+ return -EINVAL;
+
if (!(dep->flags & DWC3_EP_ENABLED)) {
ret = dwc3_gadget_start_config(dep);
if (ret)
--
2.11.0
