4.9-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 @@ -458,6 +458,8 @@ int tty_ldisc_receive_buf(struct tty_ldi if (count && ld->ops->receive_buf) ld->ops->receive_buf(ld->tty, p, f, count); } + if (count > 0) + memset(p, 0, count); return count; } EXPORT_SYMBOL_GPL(tty_ldisc_receive_buf);
