Index: firmware/usbstack/usb_storage.c
===================================================================
--- firmware/usbstack/usb_storage.c	(Revision 21324)
+++ firmware/usbstack/usb_storage.c	(Arbeitskopie)
@@ -472,6 +472,7 @@
                 if((unsigned int)length!=(SECTOR_SIZE* cur_cmd.count)
                   && (unsigned int)length!=WRITE_BUFFER_SIZE) {
                     logf("unexpected length :%d",length);
+                    break;
                 }
 
                 unsigned int next_sector = cur_cmd.sector +