random cleanup

src/platform/vboot_reference/vkernel/kernel_image.c

Index: src/platform/vboot_reference/vkernel/kernel_image.c
diff --git a/src/platform/vboot_reference/vkernel/kernel_image.c b/src/platform/vboot_reference/vkernel/kernel_image.c
index e0b7a55d79c6bba2778e48bf228773aa0077e1e6..bda016553609cc23e8a8d7640f063af8d6997594 100644
--- a/src/platform/vboot_reference/vkernel/kernel_image.c
+++ b/src/platform/vboot_reference/vkernel/kernel_image.c
@@ -333,7 +333,7 @@ int WriteKernelImage(const char* output_file,
 
   if (!image)
     return 0;
-  if (-1 == (fd = creat(output_file, S_IRWXU))) {
+  if (-1 == (fd = creat(output_file, 0666))) {
     debug("Couldn't open file for writing kernel image: %s\n",
             output_file);
     return 0;
@@ -669,8 +669,11 @@ uint8_t* GenerateKernelBlob(const char* kernel_file,
   config_buf = BufferFromFile(config_file, &config_size);
   if (!config_buf)
     goto done1;
-  if (config_size < CROS_CONFIG_SIZE) // need room for trailing '\0'
+  if (config_size >= CROS_CONFIG_SIZE) { // need room for trailing '\0'
+    error("config file %s is too large (>= %d bytes)\n",
+          config_file, CROS_CONFIG_SIZE);
     goto done1;
+  }
 
   // Replace any newlines with spaces in the config file.
   for (i=0; i < config_size; i++)
@@ -695,8 +698,10 @@ uint8_t* GenerateKernelBlob(const char* kernel_file,
     CROS_PARAMS_SIZE +
     roundup(bootloader_size, CROS_ALIGN);
   blob = (uint8_t *)Malloc(blob_size);
-  if (!blob)
+  if (!blob) {
+    error("Couldn't allocate %ld bytes.\n", blob_size);
     goto done3;
+  }
   Memset(blob, 0, blob_size);
   now = 0;