From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:49540 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731347AbeK3BZ6 (ORCPT ); Thu, 29 Nov 2018 20:25:58 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, aszlig , Milan Broz , Daniel Zatovic , Willy Tarreau Subject: [PATCH 4.4 79/86] tty: wipe buffer. Date: Thu, 29 Nov 2018 15:12:44 +0100 Message-Id: <20181129140116.150266432@linuxfoundation.org> In-Reply-To: <20181129140109.832117862@linuxfoundation.org> References: <20181129140109.832117862@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Linus Torvalds commit c9a8e5fce009e3c601a43c49ea9dbcb25d1ffac5 upstream. 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 | 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; }