From c9a8e5fce009e3c601a43c49ea9dbcb25d1ffac5 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Thu, 4 Oct 2018 11:06:13 -0700 Subject: tty: wipe buffer. After we are done with the tty buffer, zero it out. Reported-by: aszlig Tested-by: Milan Broz Tested-by: Daniel Zatovic Tested-by: aszlig Cc: Willy Tarreau Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_buffer.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/tty/tty_buffer.c') diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index 76151c002858..77070c2d1240 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -473,11 +473,15 @@ 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; } /** -- cgit v1.2.3