Patch "tty: limit terminal size to 4M chars" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

tty: limit terminal size to 4M chars

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
tty-limit-terminal-size-to-4m-chars.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dmitry Vyukov <[email protected]>
Date: Fri, 14 Oct 2016 15:18:28 +0200
Subject: tty: limit terminal size to 4M chars

From: Dmitry Vyukov <[email protected]>

commit 32b2921e6a7461fe63b71217067a6cf4bddb132f upstream.

Size of kmalloc() in vc_do_resize() is controlled by user. Too large kmalloc() size triggers WARNING message on console. Put a reasonable upper bound on terminal size to prevent WARNINGs.

---
 drivers/tty/vt/vt.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -872,6 +872,8 @@ static int vc_do_resize(struct tty_struc
 	if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
 		return 0;
 
+	if (new_screen_size > (4 << 20))
+		return -EINVAL;
 	newscreen = kmalloc(new_screen_size, GFP_USER);
 	if (!newscreen)
 		return -ENOMEM;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/tty-limit-terminal-size-to-4m-chars.patch queue-4.4/vt-clear-selection-before-resizing.patch