From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161031Ab2JSDVi (ORCPT ); Thu, 18 Oct 2012 23:21:38 -0400 Received: from mail.kernel.org ([198.145.19.201]:54588 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758055Ab2JSDRk (ORCPT ); Thu, 18 Oct 2012 23:17:40 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Patrick McHardy , Pablo Neira Ayuso , David Miller Subject: [ 25/37] netfilter: nf_nat_sip: fix via header translation with multiple parameters Date: Thu, 18 Oct 2012 20:16:48 -0700 Message-Id: <20121019031306.903770211@linuxfoundation.org> X-Mailer: git-send-email 1.8.0.rc0.18.gf84667d In-Reply-To: <20121019031302.789593147@linuxfoundation.org> References: <20121019031302.789593147@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Patrick McHardy commit f22eb25cf5b1157b29ef88c793b71972efc47143 upstream. Via-headers are parsed beginning at the first character after the Via-address. When the address is translated first and its length decreases, the offset to start parsing at is incorrect and header parameters might be missed. Update the offset after translating the Via-address to fix this. Signed-off-by: Patrick McHardy Signed-off-by: Pablo Neira Ayuso Acked-by: David Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/netfilter/nf_nat_sip.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/net/ipv4/netfilter/nf_nat_sip.c +++ b/net/ipv4/netfilter/nf_nat_sip.c @@ -148,7 +148,7 @@ static unsigned int ip_nat_sip(struct sk if (ct_sip_parse_header_uri(ct, *dptr, NULL, *datalen, hdr, NULL, &matchoff, &matchlen, &addr, &port) > 0) { - unsigned int matchend, poff, plen, buflen, n; + unsigned int olen, matchend, poff, plen, buflen, n; char buffer[sizeof("nnn.nnn.nnn.nnn:nnnnn")]; /* We're only interested in headers related to this @@ -163,11 +163,12 @@ static unsigned int ip_nat_sip(struct sk goto next; } + olen = *datalen; if (!map_addr(skb, dataoff, dptr, datalen, matchoff, matchlen, &addr, port)) return NF_DROP; - matchend = matchoff + matchlen; + matchend = matchoff + matchlen + *datalen - olen; /* The maddr= parameter (RFC 2361) specifies where to send * the reply. */