From patchwork Wed May 12 14:45:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 437960 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 F0C09C2D0D4 for ; Wed, 12 May 2021 16:45:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D5F4C611BE for ; Wed, 12 May 2021 16:45:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235202AbhELQqR (ORCPT ); Wed, 12 May 2021 12:46:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:34162 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241841AbhELQju (ORCPT ); Wed, 12 May 2021 12:39:50 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BD69661E37; Wed, 12 May 2021 16:03:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835420; bh=k+qBMd34yBZOoIMBBWJDR/+weETcK7DMKs8guJ02oy4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l1nQEC/toBtNiqc3LLyqjkV/J0mrNEWJNFpZCGy8/cR7FL3B/7QLtAnqDSKPaNSow 9/vD2aZaiObSOM0eHhpPOYHvCwW6h0Gh9oSFFxMOqG8IZrgsMX439e5csLgx9KP1Lp ChK8I32eD2Hffo2TzoY6Qex4FcnuRM9bZ9d7EA8A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold , Sasha Levin Subject: [PATCH 5.12 303/677] tty: fix return value for unsupported termiox ioctls Date: Wed, 12 May 2021 16:45:49 +0200 Message-Id: <20210512144847.274218766@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@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 [ Upstream commit 8871de06ff78e9333d86c87d7071452b690e7c9b ] Drivers should return -ENOTTY ("Inappropriate I/O control operation") when an ioctl isn't supported, while -EINVAL is used for invalid arguments. Support for termiox was added by commit 1d65b4a088de ("tty: Add termiox") in 2008 but no driver support ever followed and it was recently ripped out by commit e0efb3168d34 ("tty: Remove dead termiox code"). Fix the return value for the unsupported termiox ioctls, which have always returned -EINVAL, by explicitly returning -ENOTTY rather than removing them completely and falling back to the default unrecognised- ioctl handling. Fixes: 1d65b4a088de ("tty: Add termiox") Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20210407095208.31838-4-johan@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/tty_ioctl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index 4de1c6ddb8ff..803da2d111c8 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -774,8 +774,8 @@ int tty_mode_ioctl(struct tty_struct *tty, struct file *file, case TCSETX: case TCSETXW: case TCSETXF: - return -EINVAL; -#endif + return -ENOTTY; +#endif case TIOCGSOFTCAR: copy_termios(real_tty, &kterm); ret = put_user((kterm.c_cflag & CLOCAL) ? 1 : 0,