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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,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 AC7F3CA9EC0 for ; Mon, 28 Oct 2019 13:48:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7525820862 for ; Mon, 28 Oct 2019 13:48:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725905AbfJ1Nsx (ORCPT ); Mon, 28 Oct 2019 09:48:53 -0400 Received: from correo.us.es ([193.147.175.20]:36936 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725774AbfJ1Nsx (ORCPT ); Mon, 28 Oct 2019 09:48:53 -0400 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id 2BE7C117735 for ; Mon, 28 Oct 2019 14:48:48 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 1D6B7DA8E8 for ; Mon, 28 Oct 2019 14:48:48 +0100 (CET) Received: by antivirus1-rhel7.int (Postfix, from userid 99) id 13233DA801; Mon, 28 Oct 2019 14:48:48 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 34874B7FF2 for ; Mon, 28 Oct 2019 14:48:46 +0100 (CET) Received: from 192.168.1.97 (192.168.1.97) by antivirus1-rhel7.int (F-Secure/fsigk_smtp/550/antivirus1-rhel7.int); Mon, 28 Oct 2019 14:48:46 +0100 (CET) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/antivirus1-rhel7.int) Received: from salvia.here (sys.soleta.eu [212.170.55.40]) (Authenticated sender: pneira@us.es) by entrada.int (Postfix) with ESMTPA id 101F242EE39A for ; Mon, 28 Oct 2019 14:48:46 +0100 (CET) X-SMTPAUTHUS: auth mail.us.es From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Subject: [PATCH nf] netfilter: nft_cmp: check for register data length mismatches Date: Mon, 28 Oct 2019 14:48:45 +0100 Message-Id: <20191028134845.6389-1-pablo@netfilter.org> X-Mailer: git-send-email 2.11.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Make sure register data length does not mismatch data length in the comparison, otherwise hit EOPNOTSUPP. Fixes: c9626a2cbdb2 ("netfilter: nf_tables: add hardware offload support") Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_cmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/nft_cmp.c b/net/netfilter/nft_cmp.c index bd173b1824c6..0744b2bb46da 100644 --- a/net/netfilter/nft_cmp.c +++ b/net/netfilter/nft_cmp.c @@ -116,7 +116,7 @@ static int __nft_cmp_offload(struct nft_offload_ctx *ctx, u8 *mask = (u8 *)&flow->match.mask; u8 *key = (u8 *)&flow->match.key; - if (priv->op != NFT_CMP_EQ) + if (priv->op != NFT_CMP_EQ || reg->len != priv->len) return -EOPNOTSUPP; memcpy(key + reg->offset, &priv->data, priv->len); -- 2.11.0