[PATCH] usb: dwc3: gadget: Check for NULL descriptor

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@vger.kernel.org Signed-off-by: Thinh Nguyen thinhn@synopsys.com --- 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)