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,URIBL_BLOCKED,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 19F2EC433E0 for ; Mon, 18 May 2020 18:03:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E6AB120884 for ; Mon, 18 May 2020 18:03:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589824981; bh=eFQQvsJSP8uxgMOZ03eQ+NJeSwU57IPsCyxr1Z5fU5I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Rut9F+uMjokYRzxt4onVBgeoGGP82fGy1mmHJr80aJH00+PxpxZmylW6rIzybj74a dzHd3lw7gGo7q/JeC/5uzGg2Ic0rJFbWYN2IpuY1Lk1SCT73edIiCw1m+tADxAu+Eb fMzw7C6eHap1sxi0q6j6rcsj4Eq8x35Y8vR5uGG0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732593AbgERSDA (ORCPT ); Mon, 18 May 2020 14:03:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:47768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732573AbgERSCy (ORCPT ); Mon, 18 May 2020 14:02:54 -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 32E2B207D3; Mon, 18 May 2020 18:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589824973; bh=eFQQvsJSP8uxgMOZ03eQ+NJeSwU57IPsCyxr1Z5fU5I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MwvlO635+yFOlZv0xsG30MZPhKG+xeeP4ipWeC2fuow/EEqJYCr3TdNC8nWo6ndj/ 42H2FTPFnXhfRG5O65aYcKE7RQy81CH9tkB46Xxw/PGMTkjewQZjKafoY7hFKHH8MF D3X5bEIPIdnQQe9plKnM5Xl2QWDLeIg3RBqvoKTE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Jakub Kicinski Subject: [PATCH 5.6 041/194] dpaa2-eth: prevent array underflow in update_cls_rule() Date: Mon, 18 May 2020 19:35:31 +0200 Message-Id: <20200518173535.175349187@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200518173531.455604187@linuxfoundation.org> References: <20200518173531.455604187@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: Dan Carpenter [ Upstream commit 6d32a5119811d2e9b5caa284181944c6f1f192ed ] The "location" is controlled by the user via the ethtool_set_rxnfc() function. This update_cls_rule() function checks for array overflows but it doesn't check if the value is negative. I have changed the type to unsigned to prevent array underflows. Fixes: afb90dbb5f78 ("dpaa2-eth: Add ethtool support for flow classification") Signed-off-by: Dan Carpenter Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c @@ -625,7 +625,7 @@ static int num_rules(struct dpaa2_eth_pr static int update_cls_rule(struct net_device *net_dev, struct ethtool_rx_flow_spec *new_fs, - int location) + unsigned int location) { struct dpaa2_eth_priv *priv = netdev_priv(net_dev); struct dpaa2_eth_cls_rule *rule;