* grub-core/loader/xnu_resume.c (grub_xnu_resume): Reject empty images.

ChangeLog

@@ -1,3 +1,7 @@
+2013-10-28  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/loader/xnu_resume.c (grub_xnu_resume): Reject empty images.
+
 2013-10-28  Francesco Lavra  <francescolavra.fl@gmail.com>
 
 	* grub-core/lib/fdt.c: Fix miscellaneous bugs.

grub-core/loader/xnu_resume.c

@@ -83,6 +83,13 @@ grub_xnu_resume (char *imagename)
 			 "encrypted images aren't supported yet");
     }
 
+  if (hibhead.image_size == 0)
+    {
+      grub_file_close (file);
+      return grub_error (GRUB_ERR_BAD_OS,
+			 "hibernate image is empty");
+    }
+
   codedest = hibhead.launchcode_target_page;
   codedest *= GRUB_XNU_PAGESIZE;
   codesize = hibhead.launchcode_numpages;