DM USB: fix potential crash risk due to null pointer
Fix potential risk to crash due to null pointer.
Acked-by: Yu Wang
@@ -962,6 +962,11 @@ usb_dev_request(void *pdata, struct usb_data_xfer *xfer)
blk = usb_dev_prepare_ctrl_xfer(xfer);
data = blk ? blk->buf : NULL;
+ if (data == NULL) {
+ xfer->status = USB_ERR_IOERROR;
+ UPRINTF(LFTL, "%s unexpected NULL data\r\n", __func__);
+ goto out;
+ }
UPRINTF(LDBG, "%d-%s: urb: type 0x%x req 0x%x val 0x%x idx %d len %d "
"data %d\r\n", udev->info.path.bus,
