--- linux-cjktty-4.9.patch	2018-09-07 17:30:30.000000000 +0800
+++ linux-cjktty-4.9.112.patch	2018-09-07 22:55:12.000000000 +0800
@@ -134,8 +134,8 @@
  	if (!*vc->vc_uni_pagedir_loc)
  		con_set_default_unimap(vc);
  
--	vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
-+	vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size * 2, GFP_KERNEL);
+-	vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL);
++	vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size * 2, GFP_KERNEL);
  	if (!vc->vc_screenbuf)
  		goto err_free;
  
@@ -159,9 +159,9 @@
  
  	if (new_screen_size > (4 << 20))
  		return -EINVAL;
--	newscreen = kmalloc(new_screen_size, GFP_USER);
+-	newscreen = kzalloc(new_screen_size, GFP_USER);
 +
-+	newscreen = kmalloc(new_screen_size * 2, GFP_USER);
++	newscreen = kzalloc(new_screen_size * 2, GFP_USER);
 +
  	if (!newscreen)
  		return -ENOMEM;