--- mmap.c	2003-12-05 09:39:09.000000000 +0800
+++ mmap.c.execproto	2003-12-31 11:25:12.000000000 +0800
@@ -17,6 +17,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/pgalloc.h>
+#include <linux/mount.h>
 
 /*
  * WARNING: the debugging will use recursive algorithms so never enable this
@@ -400,8 +401,13 @@ unsigned long do_mmap_pgoff(struct file 
 	int error;
 	rb_node_t ** rb_link, * rb_parent;
 
-	if (file && (!file->f_op || !file->f_op->mmap))
-		return -ENODEV;
+	if (file) {
+		if (!file->f_op || !file->f_op->mmap)
+			return -ENODEV;
+
+		if ((prot & PROT_EXEC) && (file->f_vfsmnt->mnt_flags & MNT_NOEXEC))
+			return -EPERM;
+	}
 
 	if (!len)
 		return addr;