Check for partial read/write (#4033)

src/ngraph/runtime/host_tensor.cpp

@@ -99,9 +99,9 @@ void runtime::HostTensor::write(const void* source, size_t n)
 {
     runtime::event::Duration d1("write", "HostTensor");
 
-    if (n > m_buffer_size)
+    if (n != m_buffer_size)
     {
-        throw out_of_range("write access past end of tensor");
+        throw out_of_range("partial tensor write not supported");
     }
     char* target = get_data_ptr();
     memcpy(target, source, n);
@@ -110,9 +110,9 @@ void runtime::HostTensor::write(const void* source, size_t n)
 void runtime::HostTensor::read(void* target, size_t n) const
 {
     runtime::event::Duration d1("read", "HostTensor");
-    if (n > m_buffer_size)
+    if (n != m_buffer_size)
     {
-        throw out_of_range("read access past end of tensor");
+        throw out_of_range("partial tensor read access not supported");
     }
     const char* source = get_data_ptr();
     memcpy(target, source, n);