[PATCH 3/4] sapi: Add check for null extensions.

[Jennifer Averett]

---
 cpukit/sapi/src/extensioncreate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cpukit/sapi/src/extensioncreate.c b/cpukit/sapi/src/extensioncreate.c
index 8442096..59d37e6 100644
--- a/cpukit/sapi/src/extensioncreate.c
+++ b/cpukit/sapi/src/extensioncreate.c
@@ -39,6 +39,9 @@ rtems_status_code rtems_extension_create(
   if ( !rtems_is_name_valid( name ) )
     return RTEMS_INVALID_NAME;
 
+  if (! _User_extensions_Is_valid( extension_table ))
+    return RTEMS_INVALID_ADDRESS;
+
   the_extension = _Extension_Allocate();
 
   if ( !the_extension ) {
-- 
1.8.1.4