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 4ECFCC3A59E for ; Mon, 2 Sep 2019 16:44:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B43B21744 for ; Mon, 2 Sep 2019 16:44:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726457AbfIBQom (ORCPT ); Mon, 2 Sep 2019 12:44:42 -0400 Received: from orbyte.nwl.cc ([151.80.46.58]:46130 "EHLO orbyte.nwl.cc" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726443AbfIBQol (ORCPT ); Mon, 2 Sep 2019 12:44:41 -0400 Received: from localhost ([::1]:59220 helo=tatos) by orbyte.nwl.cc with esmtp (Exim 4.91) (envelope-from ) id 1i4pRY-0001LU-D4; Mon, 02 Sep 2019 18:44:40 +0200 From: Phil Sutter To: Pablo Neira Ayuso Cc: netfilter-devel@vger.kernel.org Subject: [conntrack-tools PATCH] conntrack: Fix CIDR to mask conversion on Big Endian Date: Mon, 2 Sep 2019 18:44:31 +0200 Message-Id: <20190902164431.18398-1-phil@nwl.cc> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Code assumed host architecture to be Little Endian. Instead produce a proper mask by pushing the set bits into most significant position and apply htonl() on the result. Fixes: 3f6a2e90936bb ("conntrack: add support for CIDR notation") Signed-off-by: Phil Sutter --- src/conntrack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/conntrack.c b/src/conntrack.c index c980a13f33d2c..baafcbd869c12 100644 --- a/src/conntrack.c +++ b/src/conntrack.c @@ -2210,7 +2210,7 @@ nfct_build_netmask(uint32_t *dst, int b, int n) dst[i] = 0xffffffff; b -= 32; } else if (b > 0) { - dst[i] = (1 << b) - 1; + dst[i] = htonl(((1 << b) - 1) << (32 - b)); b = 0; } else { dst[i] = 0; -- 2.22.0