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=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 EB714C43331 for ; Mon, 11 Nov 2019 18:30:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B911F21872 for ; Mon, 11 Nov 2019 18:30:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573497010; bh=jlnTzvoyGLFnWfdd3rhWLJ0o0stvG4YQ6aaLNBAKQag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DMVjguv12jtJ17W3U5DkpIHA6EPLd8fId2eZYRRcqhVzYwMsQYCaOFvUNqqcL4Tp8 3aDqqPEzoPcDuGVhlkGIC0LuXe5Cj+XRNl38QreT6Tmxum5flAmz2vIhkci68XY7/o /hVOXD8qc3mOaKtDNnNV5Pdj4sy22yaIZc4IpJB4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727151AbfKKSaK (ORCPT ); Mon, 11 Nov 2019 13:30:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:46376 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727164AbfKKSaJ (ORCPT ); Mon, 11 Nov 2019 13:30:09 -0500 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 9F4B921783; Mon, 11 Nov 2019 18:30:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573497009; bh=jlnTzvoyGLFnWfdd3rhWLJ0o0stvG4YQ6aaLNBAKQag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F1h/qXSmphk+5uua7dZ5bpwkPpaZwkEle+gwMU0oRBbTsAH0cIJYg94MtaJugpMDu YeIGdpJOM+C7a8atXx09KmuHxI6DgpDqCbAkhwpxDP9q9RvBUDD68TnVxie68K8f+4 /QZ26/ptbnsmhNhj1ghmNYAtIQe93olwPaTfFNqM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexandru Ardelean , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 4.4 15/43] iio: imu: adis16480: make sure provided frequency is positive Date: Mon, 11 Nov 2019 19:28:29 +0100 Message-Id: <20191111181305.391419048@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191111181246.772983347@linuxfoundation.org> References: <20191111181246.772983347@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexandru Ardelean commit 24e1eb5c0d78cfb9750b690bbe997d4d59170258 upstream. It could happen that either `val` or `val2` [provided from userspace] is negative. In that case the computed frequency could get a weird value. Fix this by checking that neither of the 2 variables is negative, and check that the computed result is not-zero. Fixes: e4f959390178 ("iio: imu: adis16480 switch sampling frequency attr to core support") Signed-off-by: Alexandru Ardelean Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/imu/adis16480.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/iio/imu/adis16480.c +++ b/drivers/iio/imu/adis16480.c @@ -266,8 +266,11 @@ static int adis16480_set_freq(struct iio struct adis16480 *st = iio_priv(indio_dev); unsigned int t; + if (val < 0 || val2 < 0) + return -EINVAL; + t = val * 1000 + val2 / 1000; - if (t <= 0) + if (t == 0) return -EINVAL; t = 2460000 / t;