Invalid read in _bfd_elf_get_symbol_version_string

	PR 20304
	* objdump.c (objdump_print_symname): Don't attempt to retrieve
	version info from synthetic symbols.

binutils/ChangeLog

+2016-06-28  Alan Modra  <amodra@gmail.com>
+
+	PR 20304
+	* objdump.c (objdump_print_symname): Don't attempt to retrieve
+	version info from synthetic symbols.
+
 2016-06-24  Alan Modra  <amodra@gmail.com>
 
 	* objcopy.c (find_section_rename): Forward declare.  Remove

binutils/objdump.c

@@ -823,7 +823,8 @@ objdump_print_symname (bfd *abfd, struct disassemble_info *inf,
 	name = alloc;
     }
 
-  version_string = bfd_get_symbol_version_string (abfd, sym, &hidden);
+  if ((sym->flags & BSF_SYNTHETIC) == 0)
+    version_string = bfd_get_symbol_version_string (abfd, sym, &hidden);
 
   if (bfd_is_und_section (bfd_get_section (sym)))
     hidden = TRUE;