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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 E5830C4CEC9 for ; Wed, 18 Sep 2019 06:24:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC12221920 for ; Wed, 18 Sep 2019 06:24:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568787849; bh=pAUTJC5wqLfsT9L0OAx6PZQXQLHUTTEDnyAZBYt62T8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yIXXFS0pZrHb9jNXdQP6dEKnKgzbsrvZy2gq/l4/RRTkkPyU17DePFf5byF3qerGA WeLlbX7h0IJFKtpG5WD3zJiS3yU3PFen+dAuu/Oee63zKKbvCrBjGqtBtqUNqP3gHv 5yuF6Xw9kr/VaVvVL7D3WHxMWBPm23gHaAsF3764= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729772AbfIRGYJ (ORCPT ); Wed, 18 Sep 2019 02:24:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:44420 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727496AbfIRGYE (ORCPT ); Wed, 18 Sep 2019 02:24:04 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6B08821928; Wed, 18 Sep 2019 06:24:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568787842; bh=pAUTJC5wqLfsT9L0OAx6PZQXQLHUTTEDnyAZBYt62T8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=finSDRgsTVX9vnT50TfxHJEJAenf8U1Heu963rvLAGCyyV0NQRqzW8E42bMMmvpkC 9TfVhE+VrIIIVEDI3HvxOVzYQoobBbW2MmCPgTRM3RzvN6AsRqAxWXgHb+TJ3a+qIc AwUDxNOYsmgCU5jm7cEpv/9M1PZmKQx8pHAd0SYY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kent Gibson , Bartosz Golaszewski Subject: [PATCH 4.19 31/50] gpio: fix line flag validation in lineevent_create Date: Wed, 18 Sep 2019 08:19:14 +0200 Message-Id: <20190918061226.681398811@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190918061223.116178343@linuxfoundation.org> References: <20190918061223.116178343@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kent Gibson commit 5ca2f54b597c816df54ff1b28eb99cf7262b955d upstream. lineevent_create should not allow any of GPIOHANDLE_REQUEST_OUTPUT, GPIOHANDLE_REQUEST_OPEN_DRAIN or GPIOHANDLE_REQUEST_OPEN_SOURCE to be set. Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines") Cc: stable Signed-off-by: Kent Gibson Signed-off-by: Bartosz Golaszewski Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpiolib.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -924,7 +924,9 @@ static int lineevent_create(struct gpio_ } /* This is just wrong: we don't look for events on output lines */ - if (lflags & GPIOHANDLE_REQUEST_OUTPUT) { + if ((lflags & GPIOHANDLE_REQUEST_OUTPUT) || + (lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN) || + (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE)) { ret = -EINVAL; goto out_free_label; } @@ -938,10 +940,6 @@ static int lineevent_create(struct gpio_ if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW) set_bit(FLAG_ACTIVE_LOW, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN) - set_bit(FLAG_OPEN_DRAIN, &desc->flags); - if (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE) - set_bit(FLAG_OPEN_SOURCE, &desc->flags); ret = gpiod_direction_input(desc); if (ret)