4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> commit c9a8e5fce009e3c601a43c49ea9dbcb25d1ffac5 upstream. After we are done with the tty buffer, zero it out. Reported-by: aszlig <aszlig@nix.build> Tested-by: Milan Broz <gmazyland@xxxxxxxxx> Tested-by: Daniel Zatovic <daniel.zatovic@xxxxxxxxx> Tested-by: aszlig <aszlig@nix.build> Cc: Willy Tarreau <w@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/tty/tty_buffer.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -454,6 +454,8 @@ receive_buf(struct tty_struct *tty, stru if (count && disc->ops->receive_buf) disc->ops->receive_buf(tty, p, f, count); } + if (count > 0) + memset(p, 0, count); return count; }
