diff --git a/mm/util.c b/mm/util.c
index ab1424d..86e8e92 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -89,6 +89,8 @@ void *memdup_user(const void __user *src, size_t len)
 {
 	void *p;
 
+	printk(KERN_ERR "memdup_user: %i\n", len);
+
 	/*
 	 * Always use GFP_KERNEL, since copy_from_user() can sleep and
 	 * cause pagefault, which makes it pointless to use GFP_NOFS