diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index efce68e9a8e038557bdc36c8263bad03cef7e108..a03aec574f64a1375be3ccad9a8cc2a5dbe3913d 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -798,6 +799,14 @@ int usb_gadget_map_request_by_dev(struct device *dev, req->num_mapped_sgs = mapped; } else { + if (is_vmalloc_addr(req->buf)) { + dev_err(dev, "buffer is not dma capable\n"); + return -EFAULT; + } else if (object_is_on_stack(req->buf)) { + dev_err(dev, "buffer is on stack\n"); + return -EFAULT; + } + req->dma = dma_map_single(dev, req->buf, req->length, is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);