From 693aa38472d90f55d2efd7807052c527032513a6 Mon Sep 17 00:00:00 2001
From: Viktor Gal <viktor.gal@maeth.com>
Date: Sat, 16 Mar 2019 07:40:59 +0100
Subject: [PATCH] Check whether the file descriptor is valid calling
 PosixWritableFile::Close twice should not cause segfaults

---
 tensorflow/core/platform/posix/posix_file_system.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tensorflow/core/platform/posix/posix_file_system.cc b/tensorflow/core/platform/posix/posix_file_system.cc
index 083284c5ff9..db54ded8a83 100644
--- a/tensorflow/core/platform/posix/posix_file_system.cc
+++ b/tensorflow/core/platform/posix/posix_file_system.cc
@@ -105,6 +105,9 @@ class PosixWritableFile : public WritableFile {
   }
 
   Status Close() override {
+    if (file_ == nullptr) {
+      return IOError(filename_, EBADF);
+    }
     Status result;
     if (fclose(file_) != 0) {
       result = IOError(filename_, errno);