1 files changed, 13 insertions, 0 deletions
diff --git a/src/tests/userprog/bad-read.c b/src/tests/userprog/bad-read.c
new file mode 100644
index 0000000..904c278
--- /dev/null
+++ b/src/tests/userprog/bad-read.c
@@ -0,0 +1,13 @@
+/* This program attempts to read memory at an address that is not mapped.
+   This should terminate the process with a -1 exit code. */
+
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void) 
+{
+  msg ("Congratulations - you have successfully dereferenced NULL: %d", 
+        *(int *)NULL);
+  fail ("should have exited with -1");
+}