Check return code of fwrite in raw image writing code.

data_layout.c

 /**
  * Copyright (c) 2011 NVIDIA Corporation.  All rights reserved.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
@@ skipping 999 matching lines @@
                         if (empty_blk == NULL) {
                                 empty_blk = malloc(context->block_size);
                                 if (!empty_blk)
                                         return -ENOMEM;
                                 memset(empty_blk, 0, context->block_size);
                         }
                         pages_to_write = context->pages_per_blk;
                         data = empty_blk;
                 }
                 /* Write the data */
-                fwrite(data, 1,
-                        pages_to_write * context->page_size,
-                        context->raw_file);
+                {
+                        size_t bytes = pages_to_write * context->page_size;
+
+                        if (fwrite(data, 1, bytes, context->raw_file) != bytes)
+                                return -1;
+                }
         }
 
         free(empty_blk);
         return 0;
 }