From patchwork Wed May 13 09:44:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 225999 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=-6.9 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=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 E16EACA90AF for ; Wed, 13 May 2020 09:53:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB6EF20769 for ; Wed, 13 May 2020 09:53:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363606; bh=EnnBG/aX6Kg6Mk78SEPquxSEbjde6dpFg9+8Mqr0Sik=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AbhSf+wX70HovG+bPRIBrfJzUgIJ3vm5j2WzqHwkgPc6n8NcXbKLs05TRqlZJ8OZ4 JjJzKlcqFJLYqU9unqy+YcsUGer2Y+0FyEXYiK3JPA86vxh09lkcY7vvRE2Dty7qej oH4/ffn11u52ZnP5dJiZYzJyu1XWBRSfNtQuVSMM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387947AbgEMJxZ (ORCPT ); Wed, 13 May 2020 05:53:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:55422 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732590AbgEMJxY (ORCPT ); Wed, 13 May 2020 05:53:24 -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 0D68C2312A; Wed, 13 May 2020 09:53:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363604; bh=EnnBG/aX6Kg6Mk78SEPquxSEbjde6dpFg9+8Mqr0Sik=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IvQ3aA2+YBUt8wkzZWP6i0SGWhzM6snfYvRZrxs9Zw9CrYBm9bTe+ToJGVXjAALOx pPz6tk2XuTyM7o2s32ENnk0Iw7J3dVpW3DDI/CpXSTIxLRlEoByDt2CuIdMMaXc7NP 4QFBRuivNiFKwbjFbZRTcgbWWsyxRuQdfUj7ffvk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , "David S. Miller" Subject: [PATCH 5.6 051/118] net: mvpp2: cls: Prevent buffer overflow in mvpp2_ethtool_cls_rule_del() Date: Wed, 13 May 2020 11:44:30 +0200 Message-Id: <20200513094421.611319013@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513094417.618129545@linuxfoundation.org> References: <20200513094417.618129545@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter [ Upstream commit 722c0f00d4feea77475a5dc943b53d60824a1e4e ] The "info->fs.location" is a u32 that comes from the user via the ethtool_set_rxnfc() function. We need to check for invalid values to prevent a buffer overflow. I copy and pasted this check from the mvpp2_ethtool_cls_rule_ins() function. Fixes: 90b509b39ac9 ("net: mvpp2: cls: Add Classification offload support") Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c @@ -1422,6 +1422,9 @@ int mvpp2_ethtool_cls_rule_del(struct mv struct mvpp2_ethtool_fs *efs; int ret; + if (info->fs.location >= MVPP2_N_RFS_ENTRIES_PER_FLOW) + return -EINVAL; + efs = port->rfs_rules[info->fs.location]; if (!efs) return -EINVAL;