1 files changed, 21 insertions, 0 deletions
diff --git a/src/tests/userprog/read-bad-fd.c b/src/tests/userprog/read-bad-fd.c
new file mode 100644
index 0000000..a8b190d
--- /dev/null
+++ b/src/tests/userprog/read-bad-fd.c
@@ -0,0 +1,21 @@
+/* Tries to read from an invalid fd,
+   which must either fail silently or terminate the process with
+   exit code -1. */
+
+#include <limits.h>
+#include <syscall.h>
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void) 
+{
+  char buf;
+  read (0x20101234, &buf, 1);
+  read (5, &buf, 1);
+  read (1234, &buf, 1);
+  read (-1, &buf, 1);
+  read (-1024, &buf, 1);
+  read (INT_MIN, &buf, 1);
+  read (INT_MAX, &buf, 1);
+}