From 01da5fd83d6b2c5e36b77539f6cbdd8f49849225 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sun, 27 Aug 2006 01:24:02 -0700 Subject: [PATCH] Fix tty layer DoS and comment relevant code Unlike the other tty comment patch this one has code changes. Specifically it limits the queue size for a tty to 64K characters (128Kbytes) worst case even if the tty is ignoring tty->throttle. This is because certain drivers don't honour the throttle value correctly, although it is a useful safeguard anyway. Signed-off-by: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/tty.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/tty.h') diff --git a/include/linux/tty.h b/include/linux/tty.h index e421d5e3481..04827ca6578 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -59,6 +59,7 @@ struct tty_bufhead { struct tty_buffer *head; /* Queue head */ struct tty_buffer *tail; /* Active buffer */ struct tty_buffer *free; /* Free queue head */ + int memory_used; /* Buffer space used excluding free queue */ }; /* * The pty uses char_buf and flag_buf as a contiguous buffer -- cgit v1.2.3