From: Linus Torvalds <[email protected]> After we are done with the tty buffer, zero it out.
Reported-by: aszlig <[email protected]> Tested-by: Milan Broz <[email protected]> Tested-by: aszlig <[email protected]> Cc: Willy Tarreau <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/tty/tty_buffer.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index c996b6859c5e..ae3ce330200e 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -468,11 +468,15 @@ receive_buf(struct tty_port *port, struct tty_buffer *head, int count) { unsigned char *p = char_buf_ptr(head, head->read); char *f = NULL; + int n; if (~head->flags & TTYB_NORMAL) f = flag_buf_ptr(head, head->read); - return port->client_ops->receive_buf(port, p, f, count); + n = port->client_ops->receive_buf(port, p, f, count); + if (n > 0) + memset(p, 0, n); + return n; } /** -- 2.19.0
