1 files changed, 16 insertions, 0 deletions

diff --git a/tests/userprog/write-bad-ptr.c b/tests/userprog/write-bad-ptr.c
new file mode 100644
index 0000000..5336479
--- /dev/null
+++ b/tests/userprog/write-bad-ptr.c
@@ -0,0 +1,16 @@
+/* Passes an invalid pointer to the write system call.
+   The process must be terminated with -1 exit code. */
+
+#include <syscall.h>
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void) 
+{
+  int handle;
+  CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
+
+  write (handle, (char *) 0x10123420, 123);
+  fail ("should have exited with -1");
+}