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| author |   Alan Cox <alan@lxorguk.ukuu.org.uk> | 2006-08-27 01:24:02 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-27 11:01:34 -0700 |
| commit | 01da5fd83d6b2c5e36b77539f6cbdd8f49849225 (patch) | |
| tree | 70c1f1cb8325fe4801b952346bd2ef79d08882b5 /include | |
| parent | [PATCH] tty layer comment the locking assumptions and functions somewhat (diff) | |
| download | linux-dev-01da5fd83d6b2c5e36b77539f6cbdd8f49849225.tar.xz linux-dev-01da5fd83d6b2c5e36b77539f6cbdd8f49849225.zip | |
[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 <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tty.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index e421d5e34818..04827ca65781 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 |