diff --git a/fs/char_dev.c b/fs/char_dev.c
index a279c58fe3606224df4c7c441090ed07f98d15b9..8a63cfa2900533c882a800d34f568b4cc760b83a 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -159,6 +159,12 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
 			ret = -EBUSY;
 			goto out;
 		}
+
+		if (new_min < old_min && new_max > old_max) {
+			ret = -EBUSY;
+			goto out;
+		}
+
 	}
 
 	cd->next = *cp;