Merge pull request #4069 from bryongloden/patch-1

close opened file descriptors properly

tensorflow/stream_executor/cuda/cuda_gpu_executor.cc

@@ -925,8 +925,10 @@ static int TryToReadNumaNode(const string &pci_bus_id, int device_ordinal) {
       LOG(INFO) << "successful NUMA node read from SysFS had negative value ("
                 << value << "), but there must be at least one NUMA node"
                             ", so returning NUMA node zero";
+      fclose(file);
       return 0;
     }
+    fclose(file);
     return value;
   }
 
@@ -934,6 +936,7 @@ static int TryToReadNumaNode(const string &pci_bus_id, int device_ordinal) {
       << "could not convert SysFS file contents to integral NUMA node value: "
       << content;
 
+  fclose(file);
   return kUnknownNumaNode;
 #endif
 }