| From c9a8e5fce009e3c601a43c49ea9dbcb25d1ffac5 Mon Sep 17 00:00:00 2001 |
| From: Linus Torvalds <torvalds@linux-foundation.org> |
| Date: Thu, 4 Oct 2018 11:06:13 -0700 |
| Subject: tty: wipe buffer. |
| |
| From: Linus Torvalds <torvalds@linux-foundation.org> |
| |
| 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@gmail.com> |
| Tested-by: Daniel Zatovic <daniel.zatovic@gmail.com> |
| Tested-by: aszlig <aszlig@nix.build> |
| Cc: Willy Tarreau <w@1wt.eu> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/tty/tty_buffer.c | 6 +++++- |
| 1 file changed, 5 insertions(+), 1 deletion(-) |
| |
| --- a/drivers/tty/tty_buffer.c |
| +++ b/drivers/tty/tty_buffer.c |
| @@ -468,11 +468,15 @@ receive_buf(struct tty_port *port, struc |
| { |
| 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; |
| } |
| |
| /** |
