From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-3641323-1519411391-5-11156688859931891294 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES enrosk.us-ascii, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1519411390; b=GlaX8Eu2f4jeUtHn3z+UsM2WT/XnCTb1AS3pn+mD/2V2D8b WUvms4JOhLzN6ahkPfgluNKNw9w1Fr2MWvrX6QjEv+IxPt4WwCLA+KuuF8wsVtAD 0Zq42vn9diNSlrsWamGuGl86GBhbHwFpgInsk4pWL8Ofn8tVOSy9ihWuPfthzqsx DusxoR9EUem16yNmHI6CANa+G3I5PS/7j6ZAOdUUos9SRK7G1Max5PGbAX+ZiQqT +GHdIrYHlusiDt3lnPLUSRWzHOh3xEkiLe+r6wkcFv/M7+iFI75Wyv1BMg1K6X6o llkhRznkyg/vmsq2ZtR3r/J4NVgDy41qn/vAPhw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1519411390; bh=9tUOxvRSq3HUDh/VSXYrJI6yFI jFhg8GBGXKxxp7zzY=; b=kIPZMFzcG30XWpQw27JrYQ7G42u0Hul9kAQgRWrRwG bzV5C2PA7AWn43pJ/fZCJNuyuDfUbSqXlfY8wrda23RFQqKuRnAvnsPfYAC9CyTu 8h4o9baD8DrPJa6KOhGbbarLdPLluNGISH008do/TL3vb3IkDcCKmx3JCi/vvEU/ 3u+seqc4cujymjsLCclvCX2Gx6E14n9W/Cvcg3yR4VVdr9E6or8vYsxcA0j8uegj A5z464Fv9fILwCOgt4agb5sTQGeEpn9fMQxkCKKl5EkPJMY3u6Ckcbteqij4R7Sj LSe8/pLr50544Evz6wbm/GBp+FMeVvQnp9XVFtuHqllw== ARC-Authentication-Results: i=1; mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Authentication-Results: mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932159AbeBWSnG (ORCPT ); Fri, 23 Feb 2018 13:43:06 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:42042 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932515AbeBWSnE (ORCPT ); Fri, 23 Feb 2018 13:43:04 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Vyukov , syzbot , Pablo Neira Ayuso Subject: [PATCH 4.9 024/145] netfilter: ipt_CLUSTERIP: fix out-of-bounds accesses in clusterip_tg_check() Date: Fri, 23 Feb 2018 19:25:30 +0100 Message-Id: <20180223170727.895360268@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180223170724.669759283@linuxfoundation.org> References: <20180223170724.669759283@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Vyukov commit 1a38956cce5eabd7b74f94bab70265e4df83165e upstream. Commit 136e92bbec0a switched local_nodes from an array to a bitmask but did not add proper bounds checks. As the result clusterip_config_init_nodelist() can both over-read ipt_clusterip_tgt_info.local_nodes and over-write clusterip_config.local_nodes. Add bounds checks for both. Fixes: 136e92bbec0a ("[NETFILTER] CLUSTERIP: use a bitmap to store node responsibility data") Signed-off-by: Dmitry Vyukov Reported-by: syzbot Signed-off-by: Pablo Neira Ayuso Signed-off-by: Greg Kroah-Hartman --- net/ipv4/netfilter/ipt_CLUSTERIP.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) --- a/net/ipv4/netfilter/ipt_CLUSTERIP.c +++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c @@ -365,7 +365,7 @@ static int clusterip_tg_check(const stru struct ipt_clusterip_tgt_info *cipinfo = par->targinfo; const struct ipt_entry *e = par->entryinfo; struct clusterip_config *config; - int ret; + int ret, i; if (par->nft_compat) { pr_err("cannot use CLUSTERIP target from nftables compat\n"); @@ -384,8 +384,18 @@ static int clusterip_tg_check(const stru pr_info("Please specify destination IP\n"); return -EINVAL; } - - /* FIXME: further sanity checks */ + if (cipinfo->num_local_nodes > ARRAY_SIZE(cipinfo->local_nodes)) { + pr_info("bad num_local_nodes %u\n", cipinfo->num_local_nodes); + return -EINVAL; + } + for (i = 0; i < cipinfo->num_local_nodes; i++) { + if (cipinfo->local_nodes[i] - 1 >= + sizeof(config->local_nodes) * 8) { + pr_info("bad local_nodes[%d] %u\n", + i, cipinfo->local_nodes[i]); + return -EINVAL; + } + } config = clusterip_config_find_get(par->net, e->ip.dst.s_addr, 1); if (!config) {