From patchwork Wed May 12 14:41:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 438409 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 3D3EBC43616 for ; Wed, 12 May 2021 15:56:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1E062613C5 for ; Wed, 12 May 2021 15:56:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234686AbhELPx6 (ORCPT ); Wed, 12 May 2021 11:53:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:51532 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235876AbhELPti (ORCPT ); Wed, 12 May 2021 11:49:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0E505619CD; Wed, 12 May 2021 15:25:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620833137; bh=K08fhwKVxiFMdIbcPy6DqeaAO5mzbxQk0ABuoa2iwtE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yEcZKXz/u20ut5BRp2ipbjrfKYWNBlmJPBjCsMDkNlMebtf4r/H7tWQIAVuY0U4Xr Gr4gvlvFtQoNJO/orPA6HA03AsgzZ27z0aRegD0N3gL0TZONY2XXuHl3xq151UFg/r NzRkjT0dndLXlGqscIyaIrrpd7im1CwuiHh24MYs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 5.11 008/601] tty: amiserial: fix TIOCSSERIAL permission check Date: Wed, 12 May 2021 16:41:25 +0200 Message-Id: <20210512144828.098505937@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold commit 1d31a831cc04f5f942de3e7d91edaa52310d3c99 upstream. Changing the port closing_wait parameter is a privileged operation. Add the missing check to TIOCSSERIAL so that -EPERM is returned in case an unprivileged user tries to change the closing-wait setting. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20210407102334.32361-9-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -970,6 +970,7 @@ static int set_serial_info(struct tty_st if (!serial_isroot()) { if ((ss->baud_base != state->baud_base) || (ss->close_delay != port->close_delay) || + (ss->closing_wait != port->closing_wait) || (ss->xmit_fifo_size != state->xmit_fifo_size) || ((ss->flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) {