1 files changed, 13 insertions, 2 deletions
diff --git a/cpukit/libcsupport/src/mknod.c b/cpukit/libcsupport/src/mknod.c
index c786c6d756..c2c86e7afe 100644
--- a/cpukit/libcsupport/src/mknod.c
+++ b/cpukit/libcsupport/src/mknod.c
@@ -40,8 +40,19 @@ int mknod(
   const char                         *name_start;
   int                                 result;
 
-  if ( !(mode & (S_IFREG|S_IFCHR|S_IFBLK|S_IFIFO) ) )
-    rtems_set_errno_and_return_minus_one( EINVAL );
+  /*
+   * The file type is field within the mode. Check we have a sane mode set.
+   */
+  switch (mode & S_IFMT) {
+    case S_IFDIR:
+    case S_IFCHR:
+    case S_IFBLK:
+    case S_IFREG:
+    case S_IFIFO:
+      break;
+    default:
+      rtems_set_errno_and_return_minus_one( EINVAL );
+  }
 
   if ( S_ISFIFO(mode) )
     rtems_set_errno_and_return_minus_one( ENOTSUP );