Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / usb / usbip / usbip_common.c

diff --git a/kernel/drivers/usb/usbip/usbip_common.c b/kernel/drivers/usb/usbip/usbip_common.c
index facaaf0..e40da77 100644 (file)
--- a/kernel/drivers/usb/usbip/usbip_common.c
+++ b/kernel/drivers/usb/usbip/usbip_common.c
@@ -741,6 +741,17 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
        if (!(size > 0))
                return 0;
 
+       if (size > urb->transfer_buffer_length) {
+               /* should not happen, probably malicious packet */
+               if (ud->side == USBIP_STUB) {
+                       usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+                       return 0;
+               } else {
+                       usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+                       return -EPIPE;
+               }
+       }
+
        ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
        if (ret != size) {
                dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);