[rtems commit] main_edit.c: Do not reference beyond end of array

[Joel Sherril]

Module:    rtems
Branch:    master
Commit:    3bd0cd1ad574ead8fe5c5bc58d62089652a02606
Changeset: http://git.rtems.org/rtems/commit/?id=3bd0cd1ad574ead8fe5c5bc58d62089652a02606

Author:    Joel Sherrill <joel.sherrill at oarcorp.com>
Date:      Mon Nov 24 13:54:26 2014 -0600

main_edit.c: Do not reference beyond end of array

---

 cpukit/libmisc/shell/main_edit.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cpukit/libmisc/shell/main_edit.c b/cpukit/libmisc/shell/main_edit.c
index 212b212..2ede21b 100644
--- a/cpukit/libmisc/shell/main_edit.c
+++ b/cpukit/libmisc/shell/main_edit.c
@@ -815,6 +815,11 @@ static int getachar(void)
 #if KEY_HISTORY
   if (key_history_in < sizeof(key_history)) {
       key_history[key_history_in++] = ch;
+#if defined(__rtems__)
+  } if (key_history_in > sizeof(key_history)) {
+    /* eliminate possibility of using index above array bounds */
+   assert( key_history_in > sizeof(key_history));
+#endif
   } else {
     memmove(&key_history[0], &key_history[1], sizeof(key_history) - sizeof(key_history[0]));
     key_history[key_history_in - 1] = ch;