From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87638C43143 for ; Tue, 2 Oct 2018 17:17:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 554162064A for ; Tue, 2 Oct 2018 17:17:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 554162064A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727415AbeJCABo (ORCPT ); Tue, 2 Oct 2018 20:01:44 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:60094 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726679AbeJCABo (ORCPT ); Tue, 2 Oct 2018 20:01:44 -0400 Received: from localhost (unknown [64.124.202.226]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 1AD11EBA; Tue, 2 Oct 2018 17:17:19 +0000 (UTC) From: Greg Kroah-Hartman To: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org, jslaby@suse.com, aszlig@nix.build, gmazyland@gmail.com, torvalds@linux-foundation.org, w@1wt.eu, Greg Kroah-Hartman Subject: [PATCH 1/2] tty: wipe buffer. Date: Tue, 2 Oct 2018 10:17:07 -0700 Message-Id: <20181002171708.1311-2-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20181002171708.1311-1-gregkh@linuxfoundation.org> References: <20181002171708.1311-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Linus Torvalds After we are done with the tty buffer, zero it out. Reported-by: aszlig Tested-by: Milan Broz 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(-) 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